diff --git a/lib/vue.js b/lib/vue.js
index 7ae9589..d800532 100644
--- a/lib/vue.js
+++ b/lib/vue.js
@@ -1,307 +1,500 @@
 /*!
- * Vue.js v1.0.26
- * (c) 2016 Evan You
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
  * Released under the MIT License.
  */
 (function (global, factory) {
   typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
   typeof define === 'function' && define.amd ? define(factory) :
-  (global.Vue = factory());
+  (global = global || self, global.Vue = factory());
 }(this, function () { 'use strict';
 
-  function set(obj, key, val) {
-    if (hasOwn(obj, key)) {
-      obj[key] = val;
-      return;
-    }
-    if (obj._isVue) {
-      set(obj._data, key, val);
-      return;
-    }
-    var ob = obj.__ob__;
-    if (!ob) {
-      obj[key] = val;
-      return;
-    }
-    ob.convert(key, val);
-    ob.dep.notify();
-    if (ob.vms) {
-      var i = ob.vms.length;
-      while (i--) {
-        var vm = ob.vms[i];
-        vm._proxy(key);
-        vm._digest();
-      }
-    }
-    return val;
+  /*  */
+
+  var emptyObject = Object.freeze({});
+
+  // These helpers produce better VM code in JS engines due to their
+  // explicitness and function inlining.
+  function isUndef (v) {
+    return v === undefined || v === null
+  }
+
+  function isDef (v) {
+    return v !== undefined && v !== null
+  }
+
+  function isTrue (v) {
+    return v === true
+  }
+
+  function isFalse (v) {
+    return v === false
   }
 
   /**
-   * Delete a property and trigger change if necessary.
-   *
-   * @param {Object} obj
-   * @param {String} key
+   * Check if value is primitive.
    */
-
-  function del(obj, key) {
-    if (!hasOwn(obj, key)) {
-      return;
-    }
-    delete obj[key];
-    var ob = obj.__ob__;
-    if (!ob) {
-      if (obj._isVue) {
-        delete obj._data[key];
-        obj._digest();
-      }
-      return;
-    }
-    ob.dep.notify();
-    if (ob.vms) {
-      var i = ob.vms.length;
-      while (i--) {
-        var vm = ob.vms[i];
-        vm._unproxy(key);
-        vm._digest();
-      }
-    }
-  }
-
-  var hasOwnProperty = Object.prototype.hasOwnProperty;
-  /**
-   * Check whether the object has the property.
-   *
-   * @param {Object} obj
-   * @param {String} key
-   * @return {Boolean}
-   */
-
-  function hasOwn(obj, key) {
-    return hasOwnProperty.call(obj, key);
-  }
-
-  /**
-   * Check if an expression is a literal value.
-   *
-   * @param {String} exp
-   * @return {Boolean}
-   */
-
-  var literalValueRE = /^\s?(true|false|-?[\d\.]+|'[^']*'|"[^"]*")\s?$/;
-
-  function isLiteral(exp) {
-    return literalValueRE.test(exp);
-  }
-
-  /**
-   * Check if a string starts with $ or _
-   *
-   * @param {String} str
-   * @return {Boolean}
-   */
-
-  function isReserved(str) {
-    var c = (str + '').charCodeAt(0);
-    return c === 0x24 || c === 0x5F;
-  }
-
-  /**
-   * Guard text output, make sure undefined outputs
-   * empty string
-   *
-   * @param {*} value
-   * @return {String}
-   */
-
-  function _toString(value) {
-    return value == null ? '' : value.toString();
-  }
-
-  /**
-   * Check and convert possible numeric strings to numbers
-   * before setting back to data
-   *
-   * @param {*} value
-   * @return {*|Number}
-   */
-
-  function toNumber(value) {
-    if (typeof value !== 'string') {
-      return value;
-    } else {
-      var parsed = Number(value);
-      return isNaN(parsed) ? value : parsed;
-    }
-  }
-
-  /**
-   * Convert string boolean literals into real booleans.
-   *
-   * @param {*} value
-   * @return {*|Boolean}
-   */
-
-  function toBoolean(value) {
-    return value === 'true' ? true : value === 'false' ? false : value;
-  }
-
-  /**
-   * Strip quotes from a string
-   *
-   * @param {String} str
-   * @return {String | false}
-   */
-
-  function stripQuotes(str) {
-    var a = str.charCodeAt(0);
-    var b = str.charCodeAt(str.length - 1);
-    return a === b && (a === 0x22 || a === 0x27) ? str.slice(1, -1) : str;
-  }
-
-  /**
-   * Camelize a hyphen-delmited string.
-   *
-   * @param {String} str
-   * @return {String}
-   */
-
-  var camelizeRE = /-(\w)/g;
-
-  function camelize(str) {
-    return str.replace(camelizeRE, toUpper);
-  }
-
-  function toUpper(_, c) {
-    return c ? c.toUpperCase() : '';
-  }
-
-  /**
-   * Hyphenate a camelCase string.
-   *
-   * @param {String} str
-   * @return {String}
-   */
-
-  var hyphenateRE = /([a-z\d])([A-Z])/g;
-
-  function hyphenate(str) {
-    return str.replace(hyphenateRE, '$1-$2').toLowerCase();
-  }
-
-  /**
-   * Converts hyphen/underscore/slash delimitered names into
-   * camelized classNames.
-   *
-   * e.g. my-component => MyComponent
-   *      some_else    => SomeElse
-   *      some/comp    => SomeComp
-   *
-   * @param {String} str
-   * @return {String}
-   */
-
-  var classifyRE = /(?:^|[-_\/])(\w)/g;
-
-  function classify(str) {
-    return str.replace(classifyRE, toUpper);
-  }
-
-  /**
-   * Simple bind, faster than native
-   *
-   * @param {Function} fn
-   * @param {Object} ctx
-   * @return {Function}
-   */
-
-  function bind(fn, ctx) {
-    return function (a) {
-      var l = arguments.length;
-      return l ? l > 1 ? fn.apply(ctx, arguments) : fn.call(ctx, a) : fn.call(ctx);
-    };
-  }
-
-  /**
-   * Convert an Array-like object to a real Array.
-   *
-   * @param {Array-like} list
-   * @param {Number} [start] - start index
-   * @return {Array}
-   */
-
-  function toArray(list, start) {
-    start = start || 0;
-    var i = list.length - start;
-    var ret = new Array(i);
-    while (i--) {
-      ret[i] = list[i + start];
-    }
-    return ret;
-  }
-
-  /**
-   * Mix properties into target object.
-   *
-   * @param {Object} to
-   * @param {Object} from
-   */
-
-  function extend(to, from) {
-    var keys = Object.keys(from);
-    var i = keys.length;
-    while (i--) {
-      to[keys[i]] = from[keys[i]];
-    }
-    return to;
+  function isPrimitive (value) {
+    return (
+      typeof value === 'string' ||
+      typeof value === 'number' ||
+      // $flow-disable-line
+      typeof value === 'symbol' ||
+      typeof value === 'boolean'
+    )
   }
 
   /**
    * Quick object check - this is primarily used to tell
    * Objects from primitive values when we know the value
    * is a JSON-compliant type.
-   *
-   * @param {*} obj
-   * @return {Boolean}
    */
+  function isObject (obj) {
+    return obj !== null && typeof obj === 'object'
+  }
 
-  function isObject(obj) {
-    return obj !== null && typeof obj === 'object';
+  /**
+   * Get the raw type string of a value, e.g., [object Object].
+   */
+  var _toString = Object.prototype.toString;
+
+  function toRawType (value) {
+    return _toString.call(value).slice(8, -1)
   }
 
   /**
    * Strict object type check. Only returns true
    * for plain JavaScript objects.
-   *
-   * @param {*} obj
-   * @return {Boolean}
    */
+  function isPlainObject (obj) {
+    return _toString.call(obj) === '[object Object]'
+  }
 
-  var toString = Object.prototype.toString;
-  var OBJECT_STRING = '[object Object]';
-
-  function isPlainObject(obj) {
-    return toString.call(obj) === OBJECT_STRING;
+  function isRegExp (v) {
+    return _toString.call(v) === '[object RegExp]'
   }
 
   /**
-   * Array type check.
-   *
-   * @param {*} obj
-   * @return {Boolean}
+   * Check if val is a valid array index.
+   */
+  function isValidArrayIndex (val) {
+    var n = parseFloat(String(val));
+    return n >= 0 && Math.floor(n) === n && isFinite(val)
+  }
+
+  function isPromise (val) {
+    return (
+      isDef(val) &&
+      typeof val.then === 'function' &&
+      typeof val.catch === 'function'
+    )
+  }
+
+  /**
+   * Convert a value to a string that is actually rendered.
+   */
+  function toString (val) {
+    return val == null
+      ? ''
+      : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+        ? JSON.stringify(val, null, 2)
+        : String(val)
+  }
+
+  /**
+   * Convert an input value to a number for persistence.
+   * If the conversion fails, return original string.
+   */
+  function toNumber (val) {
+    var n = parseFloat(val);
+    return isNaN(n) ? val : n
+  }
+
+  /**
+   * Make a map and return a function for checking if a key
+   * is in that map.
+   */
+  function makeMap (
+    str,
+    expectsLowerCase
+  ) {
+    var map = Object.create(null);
+    var list = str.split(',');
+    for (var i = 0; i < list.length; i++) {
+      map[list[i]] = true;
+    }
+    return expectsLowerCase
+      ? function (val) { return map[val.toLowerCase()]; }
+      : function (val) { return map[val]; }
+  }
+
+  /**
+   * Check if a tag is a built-in tag.
+   */
+  var isBuiltInTag = makeMap('slot,component', true);
+
+  /**
+   * Check if an attribute is a reserved attribute.
+   */
+  var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+
+  /**
+   * Remove an item from an array.
+   */
+  function remove (arr, item) {
+    if (arr.length) {
+      var index = arr.indexOf(item);
+      if (index > -1) {
+        return arr.splice(index, 1)
+      }
+    }
+  }
+
+  /**
+   * Check whether an object has the property.
+   */
+  var hasOwnProperty = Object.prototype.hasOwnProperty;
+  function hasOwn (obj, key) {
+    return hasOwnProperty.call(obj, key)
+  }
+
+  /**
+   * Create a cached version of a pure function.
+   */
+  function cached (fn) {
+    var cache = Object.create(null);
+    return (function cachedFn (str) {
+      var hit = cache[str];
+      return hit || (cache[str] = fn(str))
+    })
+  }
+
+  /**
+   * Camelize a hyphen-delimited string.
+   */
+  var camelizeRE = /-(\w)/g;
+  var camelize = cached(function (str) {
+    return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+  });
+
+  /**
+   * Capitalize a string.
+   */
+  var capitalize = cached(function (str) {
+    return str.charAt(0).toUpperCase() + str.slice(1)
+  });
+
+  /**
+   * Hyphenate a camelCase string.
+   */
+  var hyphenateRE = /\B([A-Z])/g;
+  var hyphenate = cached(function (str) {
+    return str.replace(hyphenateRE, '-$1').toLowerCase()
+  });
+
+  /**
+   * Simple bind polyfill for environments that do not support it,
+   * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+   * since native bind is now performant enough in most browsers.
+   * But removing it would mean breaking code that was able to run in
+   * PhantomJS 1.x, so this must be kept for backward compatibility.
    */
 
-  var isArray = Array.isArray;
+  /* istanbul ignore next */
+  function polyfillBind (fn, ctx) {
+    function boundFn (a) {
+      var l = arguments.length;
+      return l
+        ? l > 1
+          ? fn.apply(ctx, arguments)
+          : fn.call(ctx, a)
+        : fn.call(ctx)
+    }
+
+    boundFn._length = fn.length;
+    return boundFn
+  }
+
+  function nativeBind (fn, ctx) {
+    return fn.bind(ctx)
+  }
+
+  var bind = Function.prototype.bind
+    ? nativeBind
+    : polyfillBind;
+
+  /**
+   * Convert an Array-like object to a real Array.
+   */
+  function toArray (list, start) {
+    start = start || 0;
+    var i = list.length - start;
+    var ret = new Array(i);
+    while (i--) {
+      ret[i] = list[i + start];
+    }
+    return ret
+  }
+
+  /**
+   * Mix properties into target object.
+   */
+  function extend (to, _from) {
+    for (var key in _from) {
+      to[key] = _from[key];
+    }
+    return to
+  }
+
+  /**
+   * Merge an Array of Objects into a single Object.
+   */
+  function toObject (arr) {
+    var res = {};
+    for (var i = 0; i < arr.length; i++) {
+      if (arr[i]) {
+        extend(res, arr[i]);
+      }
+    }
+    return res
+  }
+
+  /* eslint-disable no-unused-vars */
+
+  /**
+   * Perform no operation.
+   * Stubbing args to make Flow happy without leaving useless transpiled code
+   * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
+   */
+  function noop (a, b, c) {}
+
+  /**
+   * Always return false.
+   */
+  var no = function (a, b, c) { return false; };
+
+  /* eslint-enable no-unused-vars */
+
+  /**
+   * Return the same value.
+   */
+  var identity = function (_) { return _; };
+
+  /**
+   * Generate a string containing static keys from compiler modules.
+   */
+  function genStaticKeys (modules) {
+    return modules.reduce(function (keys, m) {
+      return keys.concat(m.staticKeys || [])
+    }, []).join(',')
+  }
+
+  /**
+   * Check if two values are loosely equal - that is,
+   * if they are plain objects, do they have the same shape?
+   */
+  function looseEqual (a, b) {
+    if (a === b) { return true }
+    var isObjectA = isObject(a);
+    var isObjectB = isObject(b);
+    if (isObjectA && isObjectB) {
+      try {
+        var isArrayA = Array.isArray(a);
+        var isArrayB = Array.isArray(b);
+        if (isArrayA && isArrayB) {
+          return a.length === b.length && a.every(function (e, i) {
+            return looseEqual(e, b[i])
+          })
+        } else if (a instanceof Date && b instanceof Date) {
+          return a.getTime() === b.getTime()
+        } else if (!isArrayA && !isArrayB) {
+          var keysA = Object.keys(a);
+          var keysB = Object.keys(b);
+          return keysA.length === keysB.length && keysA.every(function (key) {
+            return looseEqual(a[key], b[key])
+          })
+        } else {
+          /* istanbul ignore next */
+          return false
+        }
+      } catch (e) {
+        /* istanbul ignore next */
+        return false
+      }
+    } else if (!isObjectA && !isObjectB) {
+      return String(a) === String(b)
+    } else {
+      return false
+    }
+  }
+
+  /**
+   * Return the first index at which a loosely equal value can be
+   * found in the array (if value is a plain object, the array must
+   * contain an object of the same shape), or -1 if it is not present.
+   */
+  function looseIndexOf (arr, val) {
+    for (var i = 0; i < arr.length; i++) {
+      if (looseEqual(arr[i], val)) { return i }
+    }
+    return -1
+  }
+
+  /**
+   * Ensure a function is called only once.
+   */
+  function once (fn) {
+    var called = false;
+    return function () {
+      if (!called) {
+        called = true;
+        fn.apply(this, arguments);
+      }
+    }
+  }
+
+  var SSR_ATTR = 'data-server-rendered';
+
+  var ASSET_TYPES = [
+    'component',
+    'directive',
+    'filter'
+  ];
+
+  var LIFECYCLE_HOOKS = [
+    'beforeCreate',
+    'created',
+    'beforeMount',
+    'mounted',
+    'beforeUpdate',
+    'updated',
+    'beforeDestroy',
+    'destroyed',
+    'activated',
+    'deactivated',
+    'errorCaptured',
+    'serverPrefetch'
+  ];
+
+  /*  */
+
+
+
+  var config = ({
+    /**
+     * Option merge strategies (used in core/util/options)
+     */
+    // $flow-disable-line
+    optionMergeStrategies: Object.create(null),
+
+    /**
+     * Whether to suppress warnings.
+     */
+    silent: false,
+
+    /**
+     * Show production mode tip message on boot?
+     */
+    productionTip: "development" !== 'production',
+
+    /**
+     * Whether to enable devtools
+     */
+    devtools: "development" !== 'production',
+
+    /**
+     * Whether to record perf
+     */
+    performance: false,
+
+    /**
+     * Error handler for watcher errors
+     */
+    errorHandler: null,
+
+    /**
+     * Warn handler for watcher warns
+     */
+    warnHandler: null,
+
+    /**
+     * Ignore certain custom elements
+     */
+    ignoredElements: [],
+
+    /**
+     * Custom user key aliases for v-on
+     */
+    // $flow-disable-line
+    keyCodes: Object.create(null),
+
+    /**
+     * Check if a tag is reserved so that it cannot be registered as a
+     * component. This is platform-dependent and may be overwritten.
+     */
+    isReservedTag: no,
+
+    /**
+     * Check if an attribute is reserved so that it cannot be used as a component
+     * prop. This is platform-dependent and may be overwritten.
+     */
+    isReservedAttr: no,
+
+    /**
+     * Check if a tag is an unknown element.
+     * Platform-dependent.
+     */
+    isUnknownElement: no,
+
+    /**
+     * Get the namespace of an element
+     */
+    getTagNamespace: noop,
+
+    /**
+     * Parse the real tag name for the specific platform.
+     */
+    parsePlatformTagName: identity,
+
+    /**
+     * Check if an attribute must be bound using property, e.g. value
+     * Platform-dependent.
+     */
+    mustUseProp: no,
+
+    /**
+     * Perform updates asynchronously. Intended to be used by Vue Test Utils
+     * This will significantly reduce performance if set to false.
+     */
+    async: true,
+
+    /**
+     * Exposed for legacy reasons
+     */
+    _lifecycleHooks: LIFECYCLE_HOOKS
+  });
+
+  /*  */
+
+  /**
+   * unicode letters used for parsing html tags, component names and property paths.
+   * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+   * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+   */
+  var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+  /**
+   * Check if a string starts with $ or _
+   */
+  function isReserved (str) {
+    var c = (str + '').charCodeAt(0);
+    return c === 0x24 || c === 0x5F
+  }
 
   /**
    * Define a property.
-   *
-   * @param {Object} obj
-   * @param {String} key
-   * @param {*} val
-   * @param {Boolean} [enumerable]
    */
-
-  function def(obj, key, val, enumerable) {
+  function def (obj, key, val, enumerable) {
     Object.defineProperty(obj, key, {
       value: val,
       enumerable: !!enumerable,
@@ -311,1903 +504,477 @@
   }
 
   /**
-   * Debounce a function so it only gets called after the
-   * input stops arriving after the given wait period.
-   *
-   * @param {Function} func
-   * @param {Number} wait
-   * @return {Function} - the debounced function
+   * Parse simple path.
    */
-
-  function _debounce(func, wait) {
-    var timeout, args, context, timestamp, result;
-    var later = function later() {
-      var last = Date.now() - timestamp;
-      if (last < wait && last >= 0) {
-        timeout = setTimeout(later, wait - last);
-      } else {
-        timeout = null;
-        result = func.apply(context, args);
-        if (!timeout) context = args = null;
-      }
-    };
-    return function () {
-      context = this;
-      args = arguments;
-      timestamp = Date.now();
-      if (!timeout) {
-        timeout = setTimeout(later, wait);
-      }
-      return result;
-    };
-  }
-
-  /**
-   * Manual indexOf because it's slightly faster than
-   * native.
-   *
-   * @param {Array} arr
-   * @param {*} obj
-   */
-
-  function indexOf(arr, obj) {
-    var i = arr.length;
-    while (i--) {
-      if (arr[i] === obj) return i;
+  var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+  function parsePath (path) {
+    if (bailRE.test(path)) {
+      return
     }
-    return -1;
-  }
-
-  /**
-   * Make a cancellable version of an async callback.
-   *
-   * @param {Function} fn
-   * @return {Function}
-   */
-
-  function cancellable(fn) {
-    var cb = function cb() {
-      if (!cb.cancelled) {
-        return fn.apply(this, arguments);
+    var segments = path.split('.');
+    return function (obj) {
+      for (var i = 0; i < segments.length; i++) {
+        if (!obj) { return }
+        obj = obj[segments[i]];
       }
-    };
-    cb.cancel = function () {
-      cb.cancelled = true;
-    };
-    return cb;
+      return obj
+    }
   }
 
-  /**
-   * Check if two values are loosely equal - that is,
-   * if they are plain objects, do they have the same shape?
-   *
-   * @param {*} a
-   * @param {*} b
-   * @return {Boolean}
-   */
+  /*  */
 
-  function looseEqual(a, b) {
-    /* eslint-disable eqeqeq */
-    return a == b || (isObject(a) && isObject(b) ? JSON.stringify(a) === JSON.stringify(b) : false);
-    /* eslint-enable eqeqeq */
-  }
-
-  var hasProto = ('__proto__' in {});
+  // can we use __proto__?
+  var hasProto = '__proto__' in {};
 
   // Browser environment sniffing
-  var inBrowser = typeof window !== 'undefined' && Object.prototype.toString.call(window) !== '[object Object]';
+  var inBrowser = typeof window !== 'undefined';
+  var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+  var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+  var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+  var isIE = UA && /msie|trident/.test(UA);
+  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+  var isEdge = UA && UA.indexOf('edge/') > 0;
+  var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+  var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+  var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+  var isPhantomJS = UA && /phantomjs/.test(UA);
+  var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+  // Firefox has a "watch" function on Object.prototype...
+  var nativeWatch = ({}).watch;
+
+  var supportsPassive = false;
+  if (inBrowser) {
+    try {
+      var opts = {};
+      Object.defineProperty(opts, 'passive', ({
+        get: function get () {
+          /* istanbul ignore next */
+          supportsPassive = true;
+        }
+      })); // https://github.com/facebook/flow/issues/285
+      window.addEventListener('test-passive', null, opts);
+    } catch (e) {}
+  }
+
+  // this needs to be lazy-evaled because vue may be required before
+  // vue-server-renderer can set VUE_ENV
+  var _isServer;
+  var isServerRendering = function () {
+    if (_isServer === undefined) {
+      /* istanbul ignore if */
+      if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+        // detect presence of vue-server-renderer and avoid
+        // Webpack shimming the process
+        _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+      } else {
+        _isServer = false;
+      }
+    }
+    return _isServer
+  };
 
   // detect devtools
   var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
 
-  // UA sniffing for working around browser-specific quirks
-  var UA = inBrowser && window.navigator.userAgent.toLowerCase();
-  var isIE = UA && UA.indexOf('trident') > 0;
-  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
-  var isAndroid = UA && UA.indexOf('android') > 0;
-  var isIos = UA && /(iphone|ipad|ipod|ios)/i.test(UA);
-  var iosVersionMatch = isIos && UA.match(/os ([\d_]+)/);
-  var iosVersion = iosVersionMatch && iosVersionMatch[1].split('_');
-
-  // detecting iOS UIWebView by indexedDB
-  var hasMutationObserverBug = iosVersion && Number(iosVersion[0]) >= 9 && Number(iosVersion[1]) >= 3 && !window.indexedDB;
-
-  var transitionProp = undefined;
-  var transitionEndEvent = undefined;
-  var animationProp = undefined;
-  var animationEndEvent = undefined;
-
-  // Transition property/event sniffing
-  if (inBrowser && !isIE9) {
-    var isWebkitTrans = window.ontransitionend === undefined && window.onwebkittransitionend !== undefined;
-    var isWebkitAnim = window.onanimationend === undefined && window.onwebkitanimationend !== undefined;
-    transitionProp = isWebkitTrans ? 'WebkitTransition' : 'transition';
-    transitionEndEvent = isWebkitTrans ? 'webkitTransitionEnd' : 'transitionend';
-    animationProp = isWebkitAnim ? 'WebkitAnimation' : 'animation';
-    animationEndEvent = isWebkitAnim ? 'webkitAnimationEnd' : 'animationend';
+  /* istanbul ignore next */
+  function isNative (Ctor) {
+    return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
   }
 
-  /**
-   * Defer a task to execute it asynchronously. Ideally this
-   * should be executed as a microtask, so we leverage
-   * MutationObserver if it's available, and fallback to
-   * setTimeout(0).
-   *
-   * @param {Function} cb
-   * @param {Object} ctx
-   */
+  var hasSymbol =
+    typeof Symbol !== 'undefined' && isNative(Symbol) &&
+    typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
 
-  var nextTick = (function () {
-    var callbacks = [];
-    var pending = false;
-    var timerFunc;
-    function nextTickHandler() {
-      pending = false;
-      var copies = callbacks.slice(0);
-      callbacks = [];
-      for (var i = 0; i < copies.length; i++) {
-        copies[i]();
-      }
-    }
-
-    /* istanbul ignore if */
-    if (typeof MutationObserver !== 'undefined' && !hasMutationObserverBug) {
-      var counter = 1;
-      var observer = new MutationObserver(nextTickHandler);
-      var textNode = document.createTextNode(counter);
-      observer.observe(textNode, {
-        characterData: true
-      });
-      timerFunc = function () {
-        counter = (counter + 1) % 2;
-        textNode.data = counter;
-      };
-    } else {
-      // webpack attempts to inject a shim for setImmediate
-      // if it is used as a global, so we have to work around that to
-      // avoid bundling unnecessary code.
-      var context = inBrowser ? window : typeof global !== 'undefined' ? global : {};
-      timerFunc = context.setImmediate || setTimeout;
-    }
-    return function (cb, ctx) {
-      var func = ctx ? function () {
-        cb.call(ctx);
-      } : cb;
-      callbacks.push(func);
-      if (pending) return;
-      pending = true;
-      timerFunc(nextTickHandler, 0);
-    };
-  })();
-
-  var _Set = undefined;
-  /* istanbul ignore if */
-  if (typeof Set !== 'undefined' && Set.toString().match(/native code/)) {
+  var _Set;
+  /* istanbul ignore if */ // $flow-disable-line
+  if (typeof Set !== 'undefined' && isNative(Set)) {
     // use native Set when available.
     _Set = Set;
   } else {
     // a non-standard Set polyfill that only works with primitive keys.
-    _Set = function () {
-      this.set = Object.create(null);
-    };
-    _Set.prototype.has = function (key) {
-      return this.set[key] !== undefined;
-    };
-    _Set.prototype.add = function (key) {
-      this.set[key] = 1;
-    };
-    _Set.prototype.clear = function () {
-      this.set = Object.create(null);
-    };
-  }
-
-  function Cache(limit) {
-    this.size = 0;
-    this.limit = limit;
-    this.head = this.tail = undefined;
-    this._keymap = Object.create(null);
-  }
-
-  var p = Cache.prototype;
-
-  /**
-   * Put <value> into the cache associated with <key>.
-   * Returns the entry which was removed to make room for
-   * the new entry. Otherwise undefined is returned.
-   * (i.e. if there was enough room already).
-   *
-   * @param {String} key
-   * @param {*} value
-   * @return {Entry|undefined}
-   */
-
-  p.put = function (key, value) {
-    var removed;
-
-    var entry = this.get(key, true);
-    if (!entry) {
-      if (this.size === this.limit) {
-        removed = this.shift();
+    _Set = /*@__PURE__*/(function () {
+      function Set () {
+        this.set = Object.create(null);
       }
-      entry = {
-        key: key
+      Set.prototype.has = function has (key) {
+        return this.set[key] === true
       };
-      this._keymap[key] = entry;
-      if (this.tail) {
-        this.tail.newer = entry;
-        entry.older = this.tail;
-      } else {
-        this.head = entry;
-      }
-      this.tail = entry;
-      this.size++;
-    }
-    entry.value = value;
-
-    return removed;
-  };
-
-  /**
-   * Purge the least recently used (oldest) entry from the
-   * cache. Returns the removed entry or undefined if the
-   * cache was empty.
-   */
-
-  p.shift = function () {
-    var entry = this.head;
-    if (entry) {
-      this.head = this.head.newer;
-      this.head.older = undefined;
-      entry.newer = entry.older = undefined;
-      this._keymap[entry.key] = undefined;
-      this.size--;
-    }
-    return entry;
-  };
-
-  /**
-   * Get and register recent use of <key>. Returns the value
-   * associated with <key> or undefined if not in cache.
-   *
-   * @param {String} key
-   * @param {Boolean} returnEntry
-   * @return {Entry|*}
-   */
-
-  p.get = function (key, returnEntry) {
-    var entry = this._keymap[key];
-    if (entry === undefined) return;
-    if (entry === this.tail) {
-      return returnEntry ? entry : entry.value;
-    }
-    // HEAD--------------TAIL
-    //   <.older   .newer>
-    //  <--- add direction --
-    //   A  B  C  <D>  E
-    if (entry.newer) {
-      if (entry === this.head) {
-        this.head = entry.newer;
-      }
-      entry.newer.older = entry.older; // C <-- E.
-    }
-    if (entry.older) {
-      entry.older.newer = entry.newer; // C. --> E
-    }
-    entry.newer = undefined; // D --x
-    entry.older = this.tail; // D. --> E
-    if (this.tail) {
-      this.tail.newer = entry; // E. <-- D
-    }
-    this.tail = entry;
-    return returnEntry ? entry : entry.value;
-  };
-
-  var cache$1 = new Cache(1000);
-  var filterTokenRE = /[^\s'"]+|'[^']*'|"[^"]*"/g;
-  var reservedArgRE = /^in$|^-?\d+/;
-
-  /**
-   * Parser state
-   */
-
-  var str;
-  var dir;
-  var c;
-  var prev;
-  var i;
-  var l;
-  var lastFilterIndex;
-  var inSingle;
-  var inDouble;
-  var curly;
-  var square;
-  var paren;
-  /**
-   * Push a filter to the current directive object
-   */
-
-  function pushFilter() {
-    var exp = str.slice(lastFilterIndex, i).trim();
-    var filter;
-    if (exp) {
-      filter = {};
-      var tokens = exp.match(filterTokenRE);
-      filter.name = tokens[0];
-      if (tokens.length > 1) {
-        filter.args = tokens.slice(1).map(processFilterArg);
-      }
-    }
-    if (filter) {
-      (dir.filters = dir.filters || []).push(filter);
-    }
-    lastFilterIndex = i + 1;
-  }
-
-  /**
-   * Check if an argument is dynamic and strip quotes.
-   *
-   * @param {String} arg
-   * @return {Object}
-   */
-
-  function processFilterArg(arg) {
-    if (reservedArgRE.test(arg)) {
-      return {
-        value: toNumber(arg),
-        dynamic: false
+      Set.prototype.add = function add (key) {
+        this.set[key] = true;
       };
-    } else {
-      var stripped = stripQuotes(arg);
-      var dynamic = stripped === arg;
-      return {
-        value: dynamic ? arg : stripped,
-        dynamic: dynamic
-      };
-    }
-  }
-
-  /**
-   * Parse a directive value and extract the expression
-   * and its filters into a descriptor.
-   *
-   * Example:
-   *
-   * "a + 1 | uppercase" will yield:
-   * {
-   *   expression: 'a + 1',
-   *   filters: [
-   *     { name: 'uppercase', args: null }
-   *   ]
-   * }
-   *
-   * @param {String} s
-   * @return {Object}
-   */
-
-  function parseDirective(s) {
-    var hit = cache$1.get(s);
-    if (hit) {
-      return hit;
-    }
-
-    // reset parser state
-    str = s;
-    inSingle = inDouble = false;
-    curly = square = paren = 0;
-    lastFilterIndex = 0;
-    dir = {};
-
-    for (i = 0, l = str.length; i < l; i++) {
-      prev = c;
-      c = str.charCodeAt(i);
-      if (inSingle) {
-        // check single quote
-        if (c === 0x27 && prev !== 0x5C) inSingle = !inSingle;
-      } else if (inDouble) {
-        // check double quote
-        if (c === 0x22 && prev !== 0x5C) inDouble = !inDouble;
-      } else if (c === 0x7C && // pipe
-      str.charCodeAt(i + 1) !== 0x7C && str.charCodeAt(i - 1) !== 0x7C) {
-        if (dir.expression == null) {
-          // first filter, end of expression
-          lastFilterIndex = i + 1;
-          dir.expression = str.slice(0, i).trim();
-        } else {
-          // already has filter
-          pushFilter();
-        }
-      } else {
-        switch (c) {
-          case 0x22:
-            inDouble = true;break; // "
-          case 0x27:
-            inSingle = true;break; // '
-          case 0x28:
-            paren++;break; // (
-          case 0x29:
-            paren--;break; // )
-          case 0x5B:
-            square++;break; // [
-          case 0x5D:
-            square--;break; // ]
-          case 0x7B:
-            curly++;break; // {
-          case 0x7D:
-            curly--;break; // }
-        }
-      }
-    }
-
-    if (dir.expression == null) {
-      dir.expression = str.slice(0, i).trim();
-    } else if (lastFilterIndex !== 0) {
-      pushFilter();
-    }
-
-    cache$1.put(s, dir);
-    return dir;
-  }
-
-var directive = Object.freeze({
-    parseDirective: parseDirective
-  });
-
-  var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
-  var cache = undefined;
-  var tagRE = undefined;
-  var htmlRE = undefined;
-  /**
-   * Escape a string so it can be used in a RegExp
-   * constructor.
-   *
-   * @param {String} str
-   */
-
-  function escapeRegex(str) {
-    return str.replace(regexEscapeRE, '\\$&');
-  }
-
-  function compileRegex() {
-    var open = escapeRegex(config.delimiters[0]);
-    var close = escapeRegex(config.delimiters[1]);
-    var unsafeOpen = escapeRegex(config.unsafeDelimiters[0]);
-    var unsafeClose = escapeRegex(config.unsafeDelimiters[1]);
-    tagRE = new RegExp(unsafeOpen + '((?:.|\\n)+?)' + unsafeClose + '|' + open + '((?:.|\\n)+?)' + close, 'g');
-    htmlRE = new RegExp('^' + unsafeOpen + '((?:.|\\n)+?)' + unsafeClose + '$');
-    // reset cache
-    cache = new Cache(1000);
-  }
-
-  /**
-   * Parse a template text string into an array of tokens.
-   *
-   * @param {String} text
-   * @return {Array<Object> | null}
-   *               - {String} type
-   *               - {String} value
-   *               - {Boolean} [html]
-   *               - {Boolean} [oneTime]
-   */
-
-  function parseText(text) {
-    if (!cache) {
-      compileRegex();
-    }
-    var hit = cache.get(text);
-    if (hit) {
-      return hit;
-    }
-    if (!tagRE.test(text)) {
-      return null;
-    }
-    var tokens = [];
-    var lastIndex = tagRE.lastIndex = 0;
-    var match, index, html, value, first, oneTime;
-    /* eslint-disable no-cond-assign */
-    while (match = tagRE.exec(text)) {
-      /* eslint-enable no-cond-assign */
-      index = match.index;
-      // push text token
-      if (index > lastIndex) {
-        tokens.push({
-          value: text.slice(lastIndex, index)
-        });
-      }
-      // tag token
-      html = htmlRE.test(match[0]);
-      value = html ? match[1] : match[2];
-      first = value.charCodeAt(0);
-      oneTime = first === 42; // *
-      value = oneTime ? value.slice(1) : value;
-      tokens.push({
-        tag: true,
-        value: value.trim(),
-        html: html,
-        oneTime: oneTime
-      });
-      lastIndex = index + match[0].length;
-    }
-    if (lastIndex < text.length) {
-      tokens.push({
-        value: text.slice(lastIndex)
-      });
-    }
-    cache.put(text, tokens);
-    return tokens;
-  }
-
-  /**
-   * Format a list of tokens into an expression.
-   * e.g. tokens parsed from 'a {{b}} c' can be serialized
-   * into one single expression as '"a " + b + " c"'.
-   *
-   * @param {Array} tokens
-   * @param {Vue} [vm]
-   * @return {String}
-   */
-
-  function tokensToExp(tokens, vm) {
-    if (tokens.length > 1) {
-      return tokens.map(function (token) {
-        return formatToken(token, vm);
-      }).join('+');
-    } else {
-      return formatToken(tokens[0], vm, true);
-    }
-  }
-
-  /**
-   * Format a single token.
-   *
-   * @param {Object} token
-   * @param {Vue} [vm]
-   * @param {Boolean} [single]
-   * @return {String}
-   */
-
-  function formatToken(token, vm, single) {
-    return token.tag ? token.oneTime && vm ? '"' + vm.$eval(token.value) + '"' : inlineFilters(token.value, single) : '"' + token.value + '"';
-  }
-
-  /**
-   * For an attribute with multiple interpolation tags,
-   * e.g. attr="some-{{thing | filter}}", in order to combine
-   * the whole thing into a single watchable expression, we
-   * have to inline those filters. This function does exactly
-   * that. This is a bit hacky but it avoids heavy changes
-   * to directive parser and watcher mechanism.
-   *
-   * @param {String} exp
-   * @param {Boolean} single
-   * @return {String}
-   */
-
-  var filterRE = /[^|]\|[^|]/;
-  function inlineFilters(exp, single) {
-    if (!filterRE.test(exp)) {
-      return single ? exp : '(' + exp + ')';
-    } else {
-      var dir = parseDirective(exp);
-      if (!dir.filters) {
-        return '(' + exp + ')';
-      } else {
-        return 'this._applyFilters(' + dir.expression + // value
-        ',null,' + // oldValue (null for read)
-        JSON.stringify(dir.filters) + // filter descriptors
-        ',false)'; // write?
-      }
-    }
-  }
-
-var text = Object.freeze({
-    compileRegex: compileRegex,
-    parseText: parseText,
-    tokensToExp: tokensToExp
-  });
-
-  var delimiters = ['{{', '}}'];
-  var unsafeDelimiters = ['{{{', '}}}'];
-
-  var config = Object.defineProperties({
-
-    /**
-     * Whether to print debug messages.
-     * Also enables stack trace for warnings.
-     *
-     * @type {Boolean}
-     */
-
-    debug: false,
-
-    /**
-     * Whether to suppress warnings.
-     *
-     * @type {Boolean}
-     */
-
-    silent: false,
-
-    /**
-     * Whether to use async rendering.
-     */
-
-    async: true,
-
-    /**
-     * Whether to warn against errors caught when evaluating
-     * expressions.
-     */
-
-    warnExpressionErrors: true,
-
-    /**
-     * Whether to allow devtools inspection.
-     * Disabled by default in production builds.
-     */
-
-    devtools: 'development' !== 'production',
-
-    /**
-     * Internal flag to indicate the delimiters have been
-     * changed.
-     *
-     * @type {Boolean}
-     */
-
-    _delimitersChanged: true,
-
-    /**
-     * List of asset types that a component can own.
-     *
-     * @type {Array}
-     */
-
-    _assetTypes: ['component', 'directive', 'elementDirective', 'filter', 'transition', 'partial'],
-
-    /**
-     * prop binding modes
-     */
-
-    _propBindingModes: {
-      ONE_WAY: 0,
-      TWO_WAY: 1,
-      ONE_TIME: 2
-    },
-
-    /**
-     * Max circular updates allowed in a batcher flush cycle.
-     */
-
-    _maxUpdateCount: 100
-
-  }, {
-    delimiters: { /**
-                   * Interpolation delimiters. Changing these would trigger
-                   * the text parser to re-compile the regular expressions.
-                   *
-                   * @type {Array<String>}
-                   */
-
-      get: function get() {
-        return delimiters;
-      },
-      set: function set(val) {
-        delimiters = val;
-        compileRegex();
-      },
-      configurable: true,
-      enumerable: true
-    },
-    unsafeDelimiters: {
-      get: function get() {
-        return unsafeDelimiters;
-      },
-      set: function set(val) {
-        unsafeDelimiters = val;
-        compileRegex();
-      },
-      configurable: true,
-      enumerable: true
-    }
-  });
-
-  var warn = undefined;
-  var formatComponentName = undefined;
-
-  if ('development' !== 'production') {
-    (function () {
-      var hasConsole = typeof console !== 'undefined';
-
-      warn = function (msg, vm) {
-        if (hasConsole && !config.silent) {
-          console.error('[Vue warn]: ' + msg + (vm ? formatComponentName(vm) : ''));
-        }
+      Set.prototype.clear = function clear () {
+        this.set = Object.create(null);
       };
 
-      formatComponentName = function (vm) {
-        var name = vm._isVue ? vm.$options.name : vm.name;
-        return name ? ' (found in component: <' + hyphenate(name) + '>)' : '';
-      };
-    })();
+      return Set;
+    }());
   }
 
-  /**
-   * Append with transition.
-   *
-   * @param {Element} el
-   * @param {Element} target
-   * @param {Vue} vm
-   * @param {Function} [cb]
-   */
+  /*  */
 
-  function appendWithTransition(el, target, vm, cb) {
-    applyTransition(el, 1, function () {
-      target.appendChild(el);
-    }, vm, cb);
-  }
+  var warn = noop;
+  var tip = noop;
+  var generateComponentTrace = (noop); // work around flow check
+  var formatComponentName = (noop);
 
-  /**
-   * InsertBefore with transition.
-   *
-   * @param {Element} el
-   * @param {Element} target
-   * @param {Vue} vm
-   * @param {Function} [cb]
-   */
+  {
+    var hasConsole = typeof console !== 'undefined';
+    var classifyRE = /(?:^|[-_])(\w)/g;
+    var classify = function (str) { return str
+      .replace(classifyRE, function (c) { return c.toUpperCase(); })
+      .replace(/[-_]/g, ''); };
 
-  function beforeWithTransition(el, target, vm, cb) {
-    applyTransition(el, 1, function () {
-      before(el, target);
-    }, vm, cb);
-  }
+    warn = function (msg, vm) {
+      var trace = vm ? generateComponentTrace(vm) : '';
 
-  /**
-   * Remove with transition.
-   *
-   * @param {Element} el
-   * @param {Vue} vm
-   * @param {Function} [cb]
-   */
-
-  function removeWithTransition(el, vm, cb) {
-    applyTransition(el, -1, function () {
-      remove(el);
-    }, vm, cb);
-  }
-
-  /**
-   * Apply transitions with an operation callback.
-   *
-   * @param {Element} el
-   * @param {Number} direction
-   *                  1: enter
-   *                 -1: leave
-   * @param {Function} op - the actual DOM operation
-   * @param {Vue} vm
-   * @param {Function} [cb]
-   */
-
-  function applyTransition(el, direction, op, vm, cb) {
-    var transition = el.__v_trans;
-    if (!transition ||
-    // skip if there are no js hooks and CSS transition is
-    // not supported
-    !transition.hooks && !transitionEndEvent ||
-    // skip transitions for initial compile
-    !vm._isCompiled ||
-    // if the vm is being manipulated by a parent directive
-    // during the parent's compilation phase, skip the
-    // animation.
-    vm.$parent && !vm.$parent._isCompiled) {
-      op();
-      if (cb) cb();
-      return;
-    }
-    var action = direction > 0 ? 'enter' : 'leave';
-    transition[action](op, cb);
-  }
-
-var transition = Object.freeze({
-    appendWithTransition: appendWithTransition,
-    beforeWithTransition: beforeWithTransition,
-    removeWithTransition: removeWithTransition,
-    applyTransition: applyTransition
-  });
-
-  /**
-   * Query an element selector if it's not an element already.
-   *
-   * @param {String|Element} el
-   * @return {Element}
-   */
-
-  function query(el) {
-    if (typeof el === 'string') {
-      var selector = el;
-      el = document.querySelector(el);
-      if (!el) {
-        'development' !== 'production' && warn('Cannot find element: ' + selector);
-      }
-    }
-    return el;
-  }
-
-  /**
-   * Check if a node is in the document.
-   * Note: document.documentElement.contains should work here
-   * but always returns false for comment nodes in phantomjs,
-   * making unit tests difficult. This is fixed by doing the
-   * contains() check on the node's parentNode instead of
-   * the node itself.
-   *
-   * @param {Node} node
-   * @return {Boolean}
-   */
-
-  function inDoc(node) {
-    if (!node) return false;
-    var doc = node.ownerDocument.documentElement;
-    var parent = node.parentNode;
-    return doc === node || doc === parent || !!(parent && parent.nodeType === 1 && doc.contains(parent));
-  }
-
-  /**
-   * Get and remove an attribute from a node.
-   *
-   * @param {Node} node
-   * @param {String} _attr
-   */
-
-  function getAttr(node, _attr) {
-    var val = node.getAttribute(_attr);
-    if (val !== null) {
-      node.removeAttribute(_attr);
-    }
-    return val;
-  }
-
-  /**
-   * Get an attribute with colon or v-bind: prefix.
-   *
-   * @param {Node} node
-   * @param {String} name
-   * @return {String|null}
-   */
-
-  function getBindAttr(node, name) {
-    var val = getAttr(node, ':' + name);
-    if (val === null) {
-      val = getAttr(node, 'v-bind:' + name);
-    }
-    return val;
-  }
-
-  /**
-   * Check the presence of a bind attribute.
-   *
-   * @param {Node} node
-   * @param {String} name
-   * @return {Boolean}
-   */
-
-  function hasBindAttr(node, name) {
-    return node.hasAttribute(name) || node.hasAttribute(':' + name) || node.hasAttribute('v-bind:' + name);
-  }
-
-  /**
-   * Insert el before target
-   *
-   * @param {Element} el
-   * @param {Element} target
-   */
-
-  function before(el, target) {
-    target.parentNode.insertBefore(el, target);
-  }
-
-  /**
-   * Insert el after target
-   *
-   * @param {Element} el
-   * @param {Element} target
-   */
-
-  function after(el, target) {
-    if (target.nextSibling) {
-      before(el, target.nextSibling);
-    } else {
-      target.parentNode.appendChild(el);
-    }
-  }
-
-  /**
-   * Remove el from DOM
-   *
-   * @param {Element} el
-   */
-
-  function remove(el) {
-    el.parentNode.removeChild(el);
-  }
-
-  /**
-   * Prepend el to target
-   *
-   * @param {Element} el
-   * @param {Element} target
-   */
-
-  function prepend(el, target) {
-    if (target.firstChild) {
-      before(el, target.firstChild);
-    } else {
-      target.appendChild(el);
-    }
-  }
-
-  /**
-   * Replace target with el
-   *
-   * @param {Element} target
-   * @param {Element} el
-   */
-
-  function replace(target, el) {
-    var parent = target.parentNode;
-    if (parent) {
-      parent.replaceChild(el, target);
-    }
-  }
-
-  /**
-   * Add event listener shorthand.
-   *
-   * @param {Element} el
-   * @param {String} event
-   * @param {Function} cb
-   * @param {Boolean} [useCapture]
-   */
-
-  function on(el, event, cb, useCapture) {
-    el.addEventListener(event, cb, useCapture);
-  }
-
-  /**
-   * Remove event listener shorthand.
-   *
-   * @param {Element} el
-   * @param {String} event
-   * @param {Function} cb
-   */
-
-  function off(el, event, cb) {
-    el.removeEventListener(event, cb);
-  }
-
-  /**
-   * For IE9 compat: when both class and :class are present
-   * getAttribute('class') returns wrong value...
-   *
-   * @param {Element} el
-   * @return {String}
-   */
-
-  function getClass(el) {
-    var classname = el.className;
-    if (typeof classname === 'object') {
-      classname = classname.baseVal || '';
-    }
-    return classname;
-  }
-
-  /**
-   * In IE9, setAttribute('class') will result in empty class
-   * if the element also has the :class attribute; However in
-   * PhantomJS, setting `className` does not work on SVG elements...
-   * So we have to do a conditional check here.
-   *
-   * @param {Element} el
-   * @param {String} cls
-   */
-
-  function setClass(el, cls) {
-    /* istanbul ignore if */
-    if (isIE9 && !/svg$/.test(el.namespaceURI)) {
-      el.className = cls;
-    } else {
-      el.setAttribute('class', cls);
-    }
-  }
-
-  /**
-   * Add class with compatibility for IE & SVG
-   *
-   * @param {Element} el
-   * @param {String} cls
-   */
-
-  function addClass(el, cls) {
-    if (el.classList) {
-      el.classList.add(cls);
-    } else {
-      var cur = ' ' + getClass(el) + ' ';
-      if (cur.indexOf(' ' + cls + ' ') < 0) {
-        setClass(el, (cur + cls).trim());
-      }
-    }
-  }
-
-  /**
-   * Remove class with compatibility for IE & SVG
-   *
-   * @param {Element} el
-   * @param {String} cls
-   */
-
-  function removeClass(el, cls) {
-    if (el.classList) {
-      el.classList.remove(cls);
-    } else {
-      var cur = ' ' + getClass(el) + ' ';
-      var tar = ' ' + cls + ' ';
-      while (cur.indexOf(tar) >= 0) {
-        cur = cur.replace(tar, ' ');
-      }
-      setClass(el, cur.trim());
-    }
-    if (!el.className) {
-      el.removeAttribute('class');
-    }
-  }
-
-  /**
-   * Extract raw content inside an element into a temporary
-   * container div
-   *
-   * @param {Element} el
-   * @param {Boolean} asFragment
-   * @return {Element|DocumentFragment}
-   */
-
-  function extractContent(el, asFragment) {
-    var child;
-    var rawContent;
-    /* istanbul ignore if */
-    if (isTemplate(el) && isFragment(el.content)) {
-      el = el.content;
-    }
-    if (el.hasChildNodes()) {
-      trimNode(el);
-      rawContent = asFragment ? document.createDocumentFragment() : document.createElement('div');
-      /* eslint-disable no-cond-assign */
-      while (child = el.firstChild) {
-        /* eslint-enable no-cond-assign */
-        rawContent.appendChild(child);
-      }
-    }
-    return rawContent;
-  }
-
-  /**
-   * Trim possible empty head/tail text and comment
-   * nodes inside a parent.
-   *
-   * @param {Node} node
-   */
-
-  function trimNode(node) {
-    var child;
-    /* eslint-disable no-sequences */
-    while ((child = node.firstChild, isTrimmable(child))) {
-      node.removeChild(child);
-    }
-    while ((child = node.lastChild, isTrimmable(child))) {
-      node.removeChild(child);
-    }
-    /* eslint-enable no-sequences */
-  }
-
-  function isTrimmable(node) {
-    return node && (node.nodeType === 3 && !node.data.trim() || node.nodeType === 8);
-  }
-
-  /**
-   * Check if an element is a template tag.
-   * Note if the template appears inside an SVG its tagName
-   * will be in lowercase.
-   *
-   * @param {Element} el
-   */
-
-  function isTemplate(el) {
-    return el.tagName && el.tagName.toLowerCase() === 'template';
-  }
-
-  /**
-   * Create an "anchor" for performing dom insertion/removals.
-   * This is used in a number of scenarios:
-   * - fragment instance
-   * - v-html
-   * - v-if
-   * - v-for
-   * - component
-   *
-   * @param {String} content
-   * @param {Boolean} persist - IE trashes empty textNodes on
-   *                            cloneNode(true), so in certain
-   *                            cases the anchor needs to be
-   *                            non-empty to be persisted in
-   *                            templates.
-   * @return {Comment|Text}
-   */
-
-  function createAnchor(content, persist) {
-    var anchor = config.debug ? document.createComment(content) : document.createTextNode(persist ? ' ' : '');
-    anchor.__v_anchor = true;
-    return anchor;
-  }
-
-  /**
-   * Find a component ref attribute that starts with $.
-   *
-   * @param {Element} node
-   * @return {String|undefined}
-   */
-
-  var refRE = /^v-ref:/;
-
-  function findRef(node) {
-    if (node.hasAttributes()) {
-      var attrs = node.attributes;
-      for (var i = 0, l = attrs.length; i < l; i++) {
-        var name = attrs[i].name;
-        if (refRE.test(name)) {
-          return camelize(name.replace(refRE, ''));
-        }
-      }
-    }
-  }
-
-  /**
-   * Map a function to a range of nodes .
-   *
-   * @param {Node} node
-   * @param {Node} end
-   * @param {Function} op
-   */
-
-  function mapNodeRange(node, end, op) {
-    var next;
-    while (node !== end) {
-      next = node.nextSibling;
-      op(node);
-      node = next;
-    }
-    op(end);
-  }
-
-  /**
-   * Remove a range of nodes with transition, store
-   * the nodes in a fragment with correct ordering,
-   * and call callback when done.
-   *
-   * @param {Node} start
-   * @param {Node} end
-   * @param {Vue} vm
-   * @param {DocumentFragment} frag
-   * @param {Function} cb
-   */
-
-  function removeNodeRange(start, end, vm, frag, cb) {
-    var done = false;
-    var removed = 0;
-    var nodes = [];
-    mapNodeRange(start, end, function (node) {
-      if (node === end) done = true;
-      nodes.push(node);
-      removeWithTransition(node, vm, onRemoved);
-    });
-    function onRemoved() {
-      removed++;
-      if (done && removed >= nodes.length) {
-        for (var i = 0; i < nodes.length; i++) {
-          frag.appendChild(nodes[i]);
-        }
-        cb && cb();
-      }
-    }
-  }
-
-  /**
-   * Check if a node is a DocumentFragment.
-   *
-   * @param {Node} node
-   * @return {Boolean}
-   */
-
-  function isFragment(node) {
-    return node && node.nodeType === 11;
-  }
-
-  /**
-   * Get outerHTML of elements, taking care
-   * of SVG elements in IE as well.
-   *
-   * @param {Element} el
-   * @return {String}
-   */
-
-  function getOuterHTML(el) {
-    if (el.outerHTML) {
-      return el.outerHTML;
-    } else {
-      var container = document.createElement('div');
-      container.appendChild(el.cloneNode(true));
-      return container.innerHTML;
-    }
-  }
-
-  var commonTagRE = /^(div|p|span|img|a|b|i|br|ul|ol|li|h1|h2|h3|h4|h5|h6|code|pre|table|th|td|tr|form|label|input|select|option|nav|article|section|header|footer)$/i;
-  var reservedTagRE = /^(slot|partial|component)$/i;
-
-  var isUnknownElement = undefined;
-  if ('development' !== 'production') {
-    isUnknownElement = function (el, tag) {
-      if (tag.indexOf('-') > -1) {
-        // http://stackoverflow.com/a/28210364/1070244
-        return el.constructor === window.HTMLUnknownElement || el.constructor === window.HTMLElement;
-      } else {
-        return (/HTMLUnknownElement/.test(el.toString()) &&
-          // Chrome returns unknown for several HTML5 elements.
-          // https://code.google.com/p/chromium/issues/detail?id=540526
-          // Firefox returns unknown for some "Interactive elements."
-          !/^(data|time|rtc|rb|details|dialog|summary)$/.test(tag)
-        );
+      if (config.warnHandler) {
+        config.warnHandler.call(null, msg, vm, trace);
+      } else if (hasConsole && (!config.silent)) {
+        console.error(("[Vue warn]: " + msg + trace));
       }
     };
-  }
 
-  /**
-   * Check if an element is a component, if yes return its
-   * component id.
-   *
-   * @param {Element} el
-   * @param {Object} options
-   * @return {Object|undefined}
-   */
+    tip = function (msg, vm) {
+      if (hasConsole && (!config.silent)) {
+        console.warn("[Vue tip]: " + msg + (
+          vm ? generateComponentTrace(vm) : ''
+        ));
+      }
+    };
 
-  function checkComponentAttr(el, options) {
-    var tag = el.tagName.toLowerCase();
-    var hasAttrs = el.hasAttributes();
-    if (!commonTagRE.test(tag) && !reservedTagRE.test(tag)) {
-      if (resolveAsset(options, 'components', tag)) {
-        return { id: tag };
-      } else {
-        var is = hasAttrs && getIsBinding(el, options);
-        if (is) {
-          return is;
-        } else if ('development' !== 'production') {
-          var expectedTag = options._componentNameMap && options._componentNameMap[tag];
-          if (expectedTag) {
-            warn('Unknown custom element: <' + tag + '> - ' + 'did you mean <' + expectedTag + '>? ' + 'HTML is case-insensitive, remember to use kebab-case in templates.');
-          } else if (isUnknownElement(el, tag)) {
-            warn('Unknown custom element: <' + tag + '> - did you ' + 'register the component correctly? For recursive components, ' + 'make sure to provide the "name" option.');
+    formatComponentName = function (vm, includeFile) {
+      if (vm.$root === vm) {
+        return '<Root>'
+      }
+      var options = typeof vm === 'function' && vm.cid != null
+        ? vm.options
+        : vm._isVue
+          ? vm.$options || vm.constructor.options
+          : vm;
+      var name = options.name || options._componentTag;
+      var file = options.__file;
+      if (!name && file) {
+        var match = file.match(/([^/\\]+)\.vue$/);
+        name = match && match[1];
+      }
+
+      return (
+        (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+        (file && includeFile !== false ? (" at " + file) : '')
+      )
+    };
+
+    var repeat = function (str, n) {
+      var res = '';
+      while (n) {
+        if (n % 2 === 1) { res += str; }
+        if (n > 1) { str += str; }
+        n >>= 1;
+      }
+      return res
+    };
+
+    generateComponentTrace = function (vm) {
+      if (vm._isVue && vm.$parent) {
+        var tree = [];
+        var currentRecursiveSequence = 0;
+        while (vm) {
+          if (tree.length > 0) {
+            var last = tree[tree.length - 1];
+            if (last.constructor === vm.constructor) {
+              currentRecursiveSequence++;
+              vm = vm.$parent;
+              continue
+            } else if (currentRecursiveSequence > 0) {
+              tree[tree.length - 1] = [last, currentRecursiveSequence];
+              currentRecursiveSequence = 0;
+            }
           }
+          tree.push(vm);
+          vm = vm.$parent;
         }
+        return '\n\nfound in\n\n' + tree
+          .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+              ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+              : formatComponentName(vm))); })
+          .join('\n')
+      } else {
+        return ("\n\n(found in " + (formatComponentName(vm)) + ")")
       }
-    } else if (hasAttrs) {
-      return getIsBinding(el, options);
-    }
+    };
   }
 
-  /**
-   * Get "is" binding from an element.
-   *
-   * @param {Element} el
-   * @param {Object} options
-   * @return {Object|undefined}
-   */
+  /*  */
 
-  function getIsBinding(el, options) {
-    // dynamic syntax
-    var exp = el.getAttribute('is');
-    if (exp != null) {
-      if (resolveAsset(options, 'components', exp)) {
-        el.removeAttribute('is');
-        return { id: exp };
-      }
-    } else {
-      exp = getBindAttr(el, 'is');
-      if (exp != null) {
-        return { id: exp, dynamic: true };
-      }
-    }
-  }
-
-  /**
-   * Option overwriting strategies are functions that handle
-   * how to merge a parent option value and a child option
-   * value into the final value.
-   *
-   * All strategy functions follow the same signature:
-   *
-   * @param {*} parentVal
-   * @param {*} childVal
-   * @param {Vue} [vm]
-   */
-
-  var strats = config.optionMergeStrategies = Object.create(null);
-
-  /**
-   * Helper that recursively merges two data objects together.
-   */
-
-  function mergeData(to, from) {
-    var key, toVal, fromVal;
-    for (key in from) {
-      toVal = to[key];
-      fromVal = from[key];
-      if (!hasOwn(to, key)) {
-        set(to, key, fromVal);
-      } else if (isObject(toVal) && isObject(fromVal)) {
-        mergeData(toVal, fromVal);
-      }
-    }
-    return to;
-  }
-
-  /**
-   * Data
-   */
-
-  strats.data = function (parentVal, childVal, vm) {
-    if (!vm) {
-      // in a Vue.extend merge, both should be functions
-      if (!childVal) {
-        return parentVal;
-      }
-      if (typeof childVal !== 'function') {
-        'development' !== 'production' && warn('The "data" option should be a function ' + 'that returns a per-instance value in component ' + 'definitions.', vm);
-        return parentVal;
-      }
-      if (!parentVal) {
-        return childVal;
-      }
-      // when parentVal & childVal are both present,
-      // we need to return a function that returns the
-      // merged result of both functions... no need to
-      // check if parentVal is a function here because
-      // it has to be a function to pass previous merges.
-      return function mergedDataFn() {
-        return mergeData(childVal.call(this), parentVal.call(this));
-      };
-    } else if (parentVal || childVal) {
-      return function mergedInstanceDataFn() {
-        // instance merge
-        var instanceData = typeof childVal === 'function' ? childVal.call(vm) : childVal;
-        var defaultData = typeof parentVal === 'function' ? parentVal.call(vm) : undefined;
-        if (instanceData) {
-          return mergeData(instanceData, defaultData);
-        } else {
-          return defaultData;
-        }
-      };
-    }
-  };
-
-  /**
-   * El
-   */
-
-  strats.el = function (parentVal, childVal, vm) {
-    if (!vm && childVal && typeof childVal !== 'function') {
-      'development' !== 'production' && warn('The "el" option should be a function ' + 'that returns a per-instance value in component ' + 'definitions.', vm);
-      return;
-    }
-    var ret = childVal || parentVal;
-    // invoke the element factory if this is instance merge
-    return vm && typeof ret === 'function' ? ret.call(vm) : ret;
-  };
-
-  /**
-   * Hooks and param attributes are merged as arrays.
-   */
-
-  strats.init = strats.created = strats.ready = strats.attached = strats.detached = strats.beforeCompile = strats.compiled = strats.beforeDestroy = strats.destroyed = strats.activate = function (parentVal, childVal) {
-    return childVal ? parentVal ? parentVal.concat(childVal) : isArray(childVal) ? childVal : [childVal] : parentVal;
-  };
-
-  /**
-   * Assets
-   *
-   * When a vm is present (instance creation), we need to do
-   * a three-way merge between constructor options, instance
-   * options and parent options.
-   */
-
-  function mergeAssets(parentVal, childVal) {
-    var res = Object.create(parentVal || null);
-    return childVal ? extend(res, guardArrayAssets(childVal)) : res;
-  }
-
-  config._assetTypes.forEach(function (type) {
-    strats[type + 's'] = mergeAssets;
-  });
-
-  /**
-   * Events & Watchers.
-   *
-   * Events & watchers hashes should not overwrite one
-   * another, so we merge them as arrays.
-   */
-
-  strats.watch = strats.events = function (parentVal, childVal) {
-    if (!childVal) return parentVal;
-    if (!parentVal) return childVal;
-    var ret = {};
-    extend(ret, parentVal);
-    for (var key in childVal) {
-      var parent = ret[key];
-      var child = childVal[key];
-      if (parent && !isArray(parent)) {
-        parent = [parent];
-      }
-      ret[key] = parent ? parent.concat(child) : [child];
-    }
-    return ret;
-  };
-
-  /**
-   * Other object hashes.
-   */
-
-  strats.props = strats.methods = strats.computed = function (parentVal, childVal) {
-    if (!childVal) return parentVal;
-    if (!parentVal) return childVal;
-    var ret = Object.create(null);
-    extend(ret, parentVal);
-    extend(ret, childVal);
-    return ret;
-  };
-
-  /**
-   * Default strategy.
-   */
-
-  var defaultStrat = function defaultStrat(parentVal, childVal) {
-    return childVal === undefined ? parentVal : childVal;
-  };
-
-  /**
-   * Make sure component options get converted to actual
-   * constructors.
-   *
-   * @param {Object} options
-   */
-
-  function guardComponents(options) {
-    if (options.components) {
-      var components = options.components = guardArrayAssets(options.components);
-      var ids = Object.keys(components);
-      var def;
-      if ('development' !== 'production') {
-        var map = options._componentNameMap = {};
-      }
-      for (var i = 0, l = ids.length; i < l; i++) {
-        var key = ids[i];
-        if (commonTagRE.test(key) || reservedTagRE.test(key)) {
-          'development' !== 'production' && warn('Do not use built-in or reserved HTML elements as component ' + 'id: ' + key);
-          continue;
-        }
-        // record a all lowercase <-> kebab-case mapping for
-        // possible custom element case error warning
-        if ('development' !== 'production') {
-          map[key.replace(/-/g, '').toLowerCase()] = hyphenate(key);
-        }
-        def = components[key];
-        if (isPlainObject(def)) {
-          components[key] = Vue.extend(def);
-        }
-      }
-    }
-  }
-
-  /**
-   * Ensure all props option syntax are normalized into the
-   * Object-based format.
-   *
-   * @param {Object} options
-   */
-
-  function guardProps(options) {
-    var props = options.props;
-    var i, val;
-    if (isArray(props)) {
-      options.props = {};
-      i = props.length;
-      while (i--) {
-        val = props[i];
-        if (typeof val === 'string') {
-          options.props[val] = null;
-        } else if (val.name) {
-          options.props[val.name] = val;
-        }
-      }
-    } else if (isPlainObject(props)) {
-      var keys = Object.keys(props);
-      i = keys.length;
-      while (i--) {
-        val = props[keys[i]];
-        if (typeof val === 'function') {
-          props[keys[i]] = { type: val };
-        }
-      }
-    }
-  }
-
-  /**
-   * Guard an Array-format assets option and converted it
-   * into the key-value Object format.
-   *
-   * @param {Object|Array} assets
-   * @return {Object}
-   */
-
-  function guardArrayAssets(assets) {
-    if (isArray(assets)) {
-      var res = {};
-      var i = assets.length;
-      var asset;
-      while (i--) {
-        asset = assets[i];
-        var id = typeof asset === 'function' ? asset.options && asset.options.name || asset.id : asset.name || asset.id;
-        if (!id) {
-          'development' !== 'production' && warn('Array-syntax assets must provide a "name" or "id" field.');
-        } else {
-          res[id] = asset;
-        }
-      }
-      return res;
-    }
-    return assets;
-  }
-
-  /**
-   * Merge two option objects into a new one.
-   * Core utility used in both instantiation and inheritance.
-   *
-   * @param {Object} parent
-   * @param {Object} child
-   * @param {Vue} [vm] - if vm is present, indicates this is
-   *                     an instantiation merge.
-   */
-
-  function mergeOptions(parent, child, vm) {
-    guardComponents(child);
-    guardProps(child);
-    if ('development' !== 'production') {
-      if (child.propsData && !vm) {
-        warn('propsData can only be used as an instantiation option.');
-      }
-    }
-    var options = {};
-    var key;
-    if (child['extends']) {
-      parent = typeof child['extends'] === 'function' ? mergeOptions(parent, child['extends'].options, vm) : mergeOptions(parent, child['extends'], vm);
-    }
-    if (child.mixins) {
-      for (var i = 0, l = child.mixins.length; i < l; i++) {
-        var mixin = child.mixins[i];
-        var mixinOptions = mixin.prototype instanceof Vue ? mixin.options : mixin;
-        parent = mergeOptions(parent, mixinOptions, vm);
-      }
-    }
-    for (key in parent) {
-      mergeField(key);
-    }
-    for (key in child) {
-      if (!hasOwn(parent, key)) {
-        mergeField(key);
-      }
-    }
-    function mergeField(key) {
-      var strat = strats[key] || defaultStrat;
-      options[key] = strat(parent[key], child[key], vm, key);
-    }
-    return options;
-  }
-
-  /**
-   * Resolve an asset.
-   * This function is used because child instances need access
-   * to assets defined in its ancestor chain.
-   *
-   * @param {Object} options
-   * @param {String} type
-   * @param {String} id
-   * @param {Boolean} warnMissing
-   * @return {Object|Function}
-   */
-
-  function resolveAsset(options, type, id, warnMissing) {
-    /* istanbul ignore if */
-    if (typeof id !== 'string') {
-      return;
-    }
-    var assets = options[type];
-    var camelizedId;
-    var res = assets[id] ||
-    // camelCase ID
-    assets[camelizedId = camelize(id)] ||
-    // Pascal Case ID
-    assets[camelizedId.charAt(0).toUpperCase() + camelizedId.slice(1)];
-    if ('development' !== 'production' && warnMissing && !res) {
-      warn('Failed to resolve ' + type.slice(0, -1) + ': ' + id, options);
-    }
-    return res;
-  }
-
-  var uid$1 = 0;
+  var uid = 0;
 
   /**
    * A dep is an observable that can have multiple
    * directives subscribing to it.
-   *
-   * @constructor
    */
-  function Dep() {
-    this.id = uid$1++;
+  var Dep = function Dep () {
+    this.id = uid++;
     this.subs = [];
-  }
+  };
 
-  // the current target watcher being evaluated.
-  // this is globally unique because there could be only one
-  // watcher being evaluated at any time.
-  Dep.target = null;
-
-  /**
-   * Add a directive subscriber.
-   *
-   * @param {Directive} sub
-   */
-
-  Dep.prototype.addSub = function (sub) {
+  Dep.prototype.addSub = function addSub (sub) {
     this.subs.push(sub);
   };
 
-  /**
-   * Remove a directive subscriber.
-   *
-   * @param {Directive} sub
-   */
-
-  Dep.prototype.removeSub = function (sub) {
-    this.subs.$remove(sub);
+  Dep.prototype.removeSub = function removeSub (sub) {
+    remove(this.subs, sub);
   };
 
-  /**
-   * Add self as a dependency to the target watcher.
-   */
-
-  Dep.prototype.depend = function () {
-    Dep.target.addDep(this);
+  Dep.prototype.depend = function depend () {
+    if (Dep.target) {
+      Dep.target.addDep(this);
+    }
   };
 
-  /**
-   * Notify all subscribers of a new value.
-   */
-
-  Dep.prototype.notify = function () {
-    // stablize the subscriber list first
-    var subs = toArray(this.subs);
+  Dep.prototype.notify = function notify () {
+    // stabilize the subscriber list first
+    var subs = this.subs.slice();
+    if (!config.async) {
+      // subs aren't sorted in scheduler if not running async
+      // we need to sort them now to make sure they fire in correct
+      // order
+      subs.sort(function (a, b) { return a.id - b.id; });
+    }
     for (var i = 0, l = subs.length; i < l; i++) {
       subs[i].update();
     }
   };
 
+  // The current target watcher being evaluated.
+  // This is globally unique because only one watcher
+  // can be evaluated at a time.
+  Dep.target = null;
+  var targetStack = [];
+
+  function pushTarget (target) {
+    targetStack.push(target);
+    Dep.target = target;
+  }
+
+  function popTarget () {
+    targetStack.pop();
+    Dep.target = targetStack[targetStack.length - 1];
+  }
+
+  /*  */
+
+  var VNode = function VNode (
+    tag,
+    data,
+    children,
+    text,
+    elm,
+    context,
+    componentOptions,
+    asyncFactory
+  ) {
+    this.tag = tag;
+    this.data = data;
+    this.children = children;
+    this.text = text;
+    this.elm = elm;
+    this.ns = undefined;
+    this.context = context;
+    this.fnContext = undefined;
+    this.fnOptions = undefined;
+    this.fnScopeId = undefined;
+    this.key = data && data.key;
+    this.componentOptions = componentOptions;
+    this.componentInstance = undefined;
+    this.parent = undefined;
+    this.raw = false;
+    this.isStatic = false;
+    this.isRootInsert = true;
+    this.isComment = false;
+    this.isCloned = false;
+    this.isOnce = false;
+    this.asyncFactory = asyncFactory;
+    this.asyncMeta = undefined;
+    this.isAsyncPlaceholder = false;
+  };
+
+  var prototypeAccessors = { child: { configurable: true } };
+
+  // DEPRECATED: alias for componentInstance for backwards compat.
+  /* istanbul ignore next */
+  prototypeAccessors.child.get = function () {
+    return this.componentInstance
+  };
+
+  Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+  var createEmptyVNode = function (text) {
+    if ( text === void 0 ) text = '';
+
+    var node = new VNode();
+    node.text = text;
+    node.isComment = true;
+    return node
+  };
+
+  function createTextVNode (val) {
+    return new VNode(undefined, undefined, undefined, String(val))
+  }
+
+  // optimized shallow clone
+  // used for static nodes and slot nodes because they may be reused across
+  // multiple renders, cloning them avoids errors when DOM manipulations rely
+  // on their elm reference.
+  function cloneVNode (vnode) {
+    var cloned = new VNode(
+      vnode.tag,
+      vnode.data,
+      // #7975
+      // clone children array to avoid mutating original in case of cloning
+      // a child.
+      vnode.children && vnode.children.slice(),
+      vnode.text,
+      vnode.elm,
+      vnode.context,
+      vnode.componentOptions,
+      vnode.asyncFactory
+    );
+    cloned.ns = vnode.ns;
+    cloned.isStatic = vnode.isStatic;
+    cloned.key = vnode.key;
+    cloned.isComment = vnode.isComment;
+    cloned.fnContext = vnode.fnContext;
+    cloned.fnOptions = vnode.fnOptions;
+    cloned.fnScopeId = vnode.fnScopeId;
+    cloned.asyncMeta = vnode.asyncMeta;
+    cloned.isCloned = true;
+    return cloned
+  }
+
+  /*
+   * not type checking this file because flow doesn't play well with
+   * dynamically accessing methods on Array prototype
+   */
+
   var arrayProto = Array.prototype;
-  var arrayMethods = Object.create(arrayProto)
+  var arrayMethods = Object.create(arrayProto);
+
+  var methodsToPatch = [
+    'push',
+    'pop',
+    'shift',
+    'unshift',
+    'splice',
+    'sort',
+    'reverse'
+  ];
 
   /**
    * Intercept mutating methods and emit events
    */
-
-  ;['push', 'pop', 'shift', 'unshift', 'splice', 'sort', 'reverse'].forEach(function (method) {
+  methodsToPatch.forEach(function (method) {
     // cache original method
     var original = arrayProto[method];
-    def(arrayMethods, method, function mutator() {
-      // avoid leaking arguments:
-      // http://jsperf.com/closure-with-arguments
-      var i = arguments.length;
-      var args = new Array(i);
-      while (i--) {
-        args[i] = arguments[i];
-      }
+    def(arrayMethods, method, function mutator () {
+      var args = [], len = arguments.length;
+      while ( len-- ) args[ len ] = arguments[ len ];
+
       var result = original.apply(this, args);
       var ob = this.__ob__;
       var inserted;
       switch (method) {
         case 'push':
-          inserted = args;
-          break;
         case 'unshift':
           inserted = args;
-          break;
+          break
         case 'splice':
           inserted = args.slice(2);
-          break;
+          break
       }
-      if (inserted) ob.observeArray(inserted);
+      if (inserted) { ob.observeArray(inserted); }
       // notify change
       ob.dep.notify();
-      return result;
+      return result
     });
   });
 
-  /**
-   * Swap the element at the given index with a new value
-   * and emits corresponding event.
-   *
-   * @param {Number} index
-   * @param {*} val
-   * @return {*} - replaced element
-   */
-
-  def(arrayProto, '$set', function $set(index, val) {
-    if (index >= this.length) {
-      this.length = Number(index) + 1;
-    }
-    return this.splice(index, 1, val)[0];
-  });
-
-  /**
-   * Convenience method to remove the element at given index or target element reference.
-   *
-   * @param {*} item
-   */
-
-  def(arrayProto, '$remove', function $remove(item) {
-    /* istanbul ignore if */
-    if (!this.length) return;
-    var index = indexOf(this, item);
-    if (index > -1) {
-      return this.splice(index, 1);
-    }
-  });
+  /*  */
 
   var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
   /**
-   * By default, when a reactive property is set, the new value is
-   * also converted to become reactive. However in certain cases, e.g.
-   * v-for scope alias and props, we don't want to force conversion
-   * because the value may be a nested value under a frozen data structure.
-   *
-   * So whenever we want to set a reactive property without forcing
-   * conversion on the new value, we wrap that call inside this function.
+   * In some cases we may want to disable observation inside a component's
+   * update computation.
    */
+  var shouldObserve = true;
 
-  var shouldConvert = true;
-
-  function withoutConversion(fn) {
-    shouldConvert = false;
-    fn();
-    shouldConvert = true;
+  function toggleObserving (value) {
+    shouldObserve = value;
   }
 
   /**
-   * Observer class that are attached to each observed
-   * object. Once attached, the observer converts target
+   * Observer class that is attached to each observed
+   * object. Once attached, the observer converts the target
    * object's property keys into getter/setters that
-   * collect dependencies and dispatches updates.
-   *
-   * @param {Array|Object} value
-   * @constructor
+   * collect dependencies and dispatch updates.
    */
-
-  function Observer(value) {
+  var Observer = function Observer (value) {
     this.value = value;
     this.dep = new Dep();
+    this.vmCount = 0;
     def(value, '__ob__', this);
-    if (isArray(value)) {
-      var augment = hasProto ? protoAugment : copyAugment;
-      augment(value, arrayMethods, arrayKeys);
+    if (Array.isArray(value)) {
+      if (hasProto) {
+        protoAugment(value, arrayMethods);
+      } else {
+        copyAugment(value, arrayMethods, arrayKeys);
+      }
       this.observeArray(value);
     } else {
       this.walk(value);
     }
-  }
-
-  // Instance methods
+  };
 
   /**
-   * Walk through each property and convert them into
+   * Walk through all properties and convert them into
    * getter/setters. This method should only be called when
    * value type is Object.
-   *
-   * @param {Object} obj
    */
-
-  Observer.prototype.walk = function (obj) {
+  Observer.prototype.walk = function walk (obj) {
     var keys = Object.keys(obj);
-    for (var i = 0, l = keys.length; i < l; i++) {
-      this.convert(keys[i], obj[keys[i]]);
+    for (var i = 0; i < keys.length; i++) {
+      defineReactive$$1(obj, keys[i]);
     }
   };
 
   /**
    * Observe a list of Array items.
-   *
-   * @param {Array} items
    */
-
-  Observer.prototype.observeArray = function (items) {
+  Observer.prototype.observeArray = function observeArray (items) {
     for (var i = 0, l = items.length; i < l; i++) {
       observe(items[i]);
     }
   };
 
-  /**
-   * Convert a property into getter/setter so we can emit
-   * the events when the property is accessed/changed.
-   *
-   * @param {String} key
-   * @param {*} val
-   */
-
-  Observer.prototype.convert = function (key, val) {
-    defineReactive(this.value, key, val);
-  };
-
-  /**
-   * Add an owner vm, so that when $set/$delete mutations
-   * happen we can notify owner vms to proxy the keys and
-   * digest the watchers. This is only called when the object
-   * is observed as an instance's root $data.
-   *
-   * @param {Vue} vm
-   */
-
-  Observer.prototype.addVm = function (vm) {
-    (this.vms || (this.vms = [])).push(vm);
-  };
-
-  /**
-   * Remove an owner vm. This is called when the object is
-   * swapped out as an instance's $data object.
-   *
-   * @param {Vue} vm
-   */
-
-  Observer.prototype.removeVm = function (vm) {
-    this.vms.$remove(vm);
-  };
-
   // helpers
 
   /**
-   * Augment an target Object or Array by intercepting
+   * Augment a target Object or Array by intercepting
    * the prototype chain using __proto__
-   *
-   * @param {Object|Array} target
-   * @param {Object} src
    */
-
-  function protoAugment(target, src) {
+  function protoAugment (target, src) {
     /* eslint-disable no-proto */
     target.__proto__ = src;
     /* eslint-enable no-proto */
   }
 
   /**
-   * Augment an target Object or Array by defining
+   * Augment a target Object or Array by defining
    * hidden properties.
-   *
-   * @param {Object|Array} target
-   * @param {Object} proto
    */
-
-  function copyAugment(target, src, keys) {
+  /* istanbul ignore next */
+  function copyAugment (target, src, keys) {
     for (var i = 0, l = keys.length; i < l; i++) {
       var key = keys[i];
       def(target, key, src[key]);
@@ -2218,929 +985,3475 @@ var transition = Object.freeze({
    * Attempt to create an observer instance for a value,
    * returns the new observer if successfully observed,
    * or the existing observer if the value already has one.
-   *
-   * @param {*} value
-   * @param {Vue} [vm]
-   * @return {Observer|undefined}
-   * @static
    */
-
-  function observe(value, vm) {
-    if (!value || typeof value !== 'object') {
-      return;
+  function observe (value, asRootData) {
+    if (!isObject(value) || value instanceof VNode) {
+      return
     }
     var ob;
     if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
       ob = value.__ob__;
-    } else if (shouldConvert && (isArray(value) || isPlainObject(value)) && Object.isExtensible(value) && !value._isVue) {
+    } else if (
+      shouldObserve &&
+      !isServerRendering() &&
+      (Array.isArray(value) || isPlainObject(value)) &&
+      Object.isExtensible(value) &&
+      !value._isVue
+    ) {
       ob = new Observer(value);
     }
-    if (ob && vm) {
-      ob.addVm(vm);
+    if (asRootData && ob) {
+      ob.vmCount++;
     }
-    return ob;
+    return ob
   }
 
   /**
    * Define a reactive property on an Object.
-   *
-   * @param {Object} obj
-   * @param {String} key
-   * @param {*} val
    */
-
-  function defineReactive(obj, key, val) {
+  function defineReactive$$1 (
+    obj,
+    key,
+    val,
+    customSetter,
+    shallow
+  ) {
     var dep = new Dep();
 
     var property = Object.getOwnPropertyDescriptor(obj, key);
     if (property && property.configurable === false) {
-      return;
+      return
     }
 
     // cater for pre-defined getter/setters
     var getter = property && property.get;
     var setter = property && property.set;
+    if ((!getter || setter) && arguments.length === 2) {
+      val = obj[key];
+    }
 
-    var childOb = observe(val);
+    var childOb = !shallow && observe(val);
     Object.defineProperty(obj, key, {
       enumerable: true,
       configurable: true,
-      get: function reactiveGetter() {
+      get: function reactiveGetter () {
         var value = getter ? getter.call(obj) : val;
         if (Dep.target) {
           dep.depend();
           if (childOb) {
             childOb.dep.depend();
-          }
-          if (isArray(value)) {
-            for (var e, i = 0, l = value.length; i < l; i++) {
-              e = value[i];
-              e && e.__ob__ && e.__ob__.dep.depend();
+            if (Array.isArray(value)) {
+              dependArray(value);
             }
           }
         }
-        return value;
+        return value
       },
-      set: function reactiveSetter(newVal) {
+      set: function reactiveSetter (newVal) {
         var value = getter ? getter.call(obj) : val;
-        if (newVal === value) {
-          return;
+        /* eslint-disable no-self-compare */
+        if (newVal === value || (newVal !== newVal && value !== value)) {
+          return
         }
+        /* eslint-enable no-self-compare */
+        if (customSetter) {
+          customSetter();
+        }
+        // #7981: for accessor properties without setter
+        if (getter && !setter) { return }
         if (setter) {
           setter.call(obj, newVal);
         } else {
           val = newVal;
         }
-        childOb = observe(newVal);
+        childOb = !shallow && observe(newVal);
         dep.notify();
       }
     });
   }
 
-
-
-  var util = Object.freeze({
-  	defineReactive: defineReactive,
-  	set: set,
-  	del: del,
-  	hasOwn: hasOwn,
-  	isLiteral: isLiteral,
-  	isReserved: isReserved,
-  	_toString: _toString,
-  	toNumber: toNumber,
-  	toBoolean: toBoolean,
-  	stripQuotes: stripQuotes,
-  	camelize: camelize,
-  	hyphenate: hyphenate,
-  	classify: classify,
-  	bind: bind,
-  	toArray: toArray,
-  	extend: extend,
-  	isObject: isObject,
-  	isPlainObject: isPlainObject,
-  	def: def,
-  	debounce: _debounce,
-  	indexOf: indexOf,
-  	cancellable: cancellable,
-  	looseEqual: looseEqual,
-  	isArray: isArray,
-  	hasProto: hasProto,
-  	inBrowser: inBrowser,
-  	devtools: devtools,
-  	isIE: isIE,
-  	isIE9: isIE9,
-  	isAndroid: isAndroid,
-  	isIos: isIos,
-  	iosVersionMatch: iosVersionMatch,
-  	iosVersion: iosVersion,
-  	hasMutationObserverBug: hasMutationObserverBug,
-  	get transitionProp () { return transitionProp; },
-  	get transitionEndEvent () { return transitionEndEvent; },
-  	get animationProp () { return animationProp; },
-  	get animationEndEvent () { return animationEndEvent; },
-  	nextTick: nextTick,
-  	get _Set () { return _Set; },
-  	query: query,
-  	inDoc: inDoc,
-  	getAttr: getAttr,
-  	getBindAttr: getBindAttr,
-  	hasBindAttr: hasBindAttr,
-  	before: before,
-  	after: after,
-  	remove: remove,
-  	prepend: prepend,
-  	replace: replace,
-  	on: on,
-  	off: off,
-  	setClass: setClass,
-  	addClass: addClass,
-  	removeClass: removeClass,
-  	extractContent: extractContent,
-  	trimNode: trimNode,
-  	isTemplate: isTemplate,
-  	createAnchor: createAnchor,
-  	findRef: findRef,
-  	mapNodeRange: mapNodeRange,
-  	removeNodeRange: removeNodeRange,
-  	isFragment: isFragment,
-  	getOuterHTML: getOuterHTML,
-  	mergeOptions: mergeOptions,
-  	resolveAsset: resolveAsset,
-  	checkComponentAttr: checkComponentAttr,
-  	commonTagRE: commonTagRE,
-  	reservedTagRE: reservedTagRE,
-  	get warn () { return warn; }
-  });
-
-  var uid = 0;
-
-  function initMixin (Vue) {
-    /**
-     * The main init sequence. This is called for every
-     * instance, including ones that are created from extended
-     * constructors.
-     *
-     * @param {Object} options - this options object should be
-     *                           the result of merging class
-     *                           options and the options passed
-     *                           in to the constructor.
-     */
-
-    Vue.prototype._init = function (options) {
-      options = options || {};
-
-      this.$el = null;
-      this.$parent = options.parent;
-      this.$root = this.$parent ? this.$parent.$root : this;
-      this.$children = [];
-      this.$refs = {}; // child vm references
-      this.$els = {}; // element references
-      this._watchers = []; // all watchers as an array
-      this._directives = []; // all directives
-
-      // a uid
-      this._uid = uid++;
-
-      // a flag to avoid this being observed
-      this._isVue = true;
-
-      // events bookkeeping
-      this._events = {}; // registered callbacks
-      this._eventsCount = {}; // for $broadcast optimization
-
-      // fragment instance properties
-      this._isFragment = false;
-      this._fragment = // @type {DocumentFragment}
-      this._fragmentStart = // @type {Text|Comment}
-      this._fragmentEnd = null; // @type {Text|Comment}
-
-      // lifecycle state
-      this._isCompiled = this._isDestroyed = this._isReady = this._isAttached = this._isBeingDestroyed = this._vForRemoving = false;
-      this._unlinkFn = null;
-
-      // context:
-      // if this is a transcluded component, context
-      // will be the common parent vm of this instance
-      // and its host.
-      this._context = options._context || this.$parent;
-
-      // scope:
-      // if this is inside an inline v-for, the scope
-      // will be the intermediate scope created for this
-      // repeat fragment. this is used for linking props
-      // and container directives.
-      this._scope = options._scope;
-
-      // fragment:
-      // if this instance is compiled inside a Fragment, it
-      // needs to reigster itself as a child of that fragment
-      // for attach/detach to work properly.
-      this._frag = options._frag;
-      if (this._frag) {
-        this._frag.children.push(this);
-      }
-
-      // push self into parent / transclusion host
-      if (this.$parent) {
-        this.$parent.$children.push(this);
-      }
-
-      // merge options.
-      options = this.$options = mergeOptions(this.constructor.options, options, this);
-
-      // set ref
-      this._updateRef();
-
-      // initialize data as empty object.
-      // it will be filled up in _initData().
-      this._data = {};
-
-      // call init hook
-      this._callHook('init');
-
-      // initialize data observation and scope inheritance.
-      this._initState();
-
-      // setup event system and option events.
-      this._initEvents();
-
-      // call created hook
-      this._callHook('created');
-
-      // if `el` option is passed, start compilation.
-      if (options.el) {
-        this.$mount(options.el);
-      }
-    };
-  }
-
-  var pathCache = new Cache(1000);
-
-  // actions
-  var APPEND = 0;
-  var PUSH = 1;
-  var INC_SUB_PATH_DEPTH = 2;
-  var PUSH_SUB_PATH = 3;
-
-  // states
-  var BEFORE_PATH = 0;
-  var IN_PATH = 1;
-  var BEFORE_IDENT = 2;
-  var IN_IDENT = 3;
-  var IN_SUB_PATH = 4;
-  var IN_SINGLE_QUOTE = 5;
-  var IN_DOUBLE_QUOTE = 6;
-  var AFTER_PATH = 7;
-  var ERROR = 8;
-
-  var pathStateMachine = [];
-
-  pathStateMachine[BEFORE_PATH] = {
-    'ws': [BEFORE_PATH],
-    'ident': [IN_IDENT, APPEND],
-    '[': [IN_SUB_PATH],
-    'eof': [AFTER_PATH]
-  };
-
-  pathStateMachine[IN_PATH] = {
-    'ws': [IN_PATH],
-    '.': [BEFORE_IDENT],
-    '[': [IN_SUB_PATH],
-    'eof': [AFTER_PATH]
-  };
-
-  pathStateMachine[BEFORE_IDENT] = {
-    'ws': [BEFORE_IDENT],
-    'ident': [IN_IDENT, APPEND]
-  };
-
-  pathStateMachine[IN_IDENT] = {
-    'ident': [IN_IDENT, APPEND],
-    '0': [IN_IDENT, APPEND],
-    'number': [IN_IDENT, APPEND],
-    'ws': [IN_PATH, PUSH],
-    '.': [BEFORE_IDENT, PUSH],
-    '[': [IN_SUB_PATH, PUSH],
-    'eof': [AFTER_PATH, PUSH]
-  };
-
-  pathStateMachine[IN_SUB_PATH] = {
-    "'": [IN_SINGLE_QUOTE, APPEND],
-    '"': [IN_DOUBLE_QUOTE, APPEND],
-    '[': [IN_SUB_PATH, INC_SUB_PATH_DEPTH],
-    ']': [IN_PATH, PUSH_SUB_PATH],
-    'eof': ERROR,
-    'else': [IN_SUB_PATH, APPEND]
-  };
-
-  pathStateMachine[IN_SINGLE_QUOTE] = {
-    "'": [IN_SUB_PATH, APPEND],
-    'eof': ERROR,
-    'else': [IN_SINGLE_QUOTE, APPEND]
-  };
-
-  pathStateMachine[IN_DOUBLE_QUOTE] = {
-    '"': [IN_SUB_PATH, APPEND],
-    'eof': ERROR,
-    'else': [IN_DOUBLE_QUOTE, APPEND]
-  };
-
   /**
-   * Determine the type of a character in a keypath.
-   *
-   * @param {Char} ch
-   * @return {String} type
+   * Set a property on an object. Adds the new property and
+   * triggers change notification if the property doesn't
+   * already exist.
    */
-
-  function getPathCharType(ch) {
-    if (ch === undefined) {
-      return 'eof';
+  function set (target, key, val) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
     }
-
-    var code = ch.charCodeAt(0);
-
-    switch (code) {
-      case 0x5B: // [
-      case 0x5D: // ]
-      case 0x2E: // .
-      case 0x22: // "
-      case 0x27: // '
-      case 0x30:
-        // 0
-        return ch;
-
-      case 0x5F: // _
-      case 0x24:
-        // $
-        return 'ident';
-
-      case 0x20: // Space
-      case 0x09: // Tab
-      case 0x0A: // Newline
-      case 0x0D: // Return
-      case 0xA0: // No-break space
-      case 0xFEFF: // Byte Order Mark
-      case 0x2028: // Line Separator
-      case 0x2029:
-        // Paragraph Separator
-        return 'ws';
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.length = Math.max(target.length, key);
+      target.splice(key, 1, val);
+      return val
     }
-
-    // a-z, A-Z
-    if (code >= 0x61 && code <= 0x7A || code >= 0x41 && code <= 0x5A) {
-      return 'ident';
+    if (key in target && !(key in Object.prototype)) {
+      target[key] = val;
+      return val
     }
-
-    // 1-9
-    if (code >= 0x31 && code <= 0x39) {
-      return 'number';
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
+      warn(
+        'Avoid adding reactive properties to a Vue instance or its root $data ' +
+        'at runtime - declare it upfront in the data option.'
+      );
+      return val
     }
-
-    return 'else';
+    if (!ob) {
+      target[key] = val;
+      return val
+    }
+    defineReactive$$1(ob.value, key, val);
+    ob.dep.notify();
+    return val
   }
 
   /**
-   * Format a subPath, return its plain form if it is
-   * a literal string or number. Otherwise prepend the
-   * dynamic indicator (*).
-   *
-   * @param {String} path
-   * @return {String}
+   * Delete a property and trigger change if necessary.
    */
-
-  function formatSubPath(path) {
-    var trimmed = path.trim();
-    // invalid leading 0
-    if (path.charAt(0) === '0' && isNaN(path)) {
-      return false;
+  function del (target, key) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
     }
-    return isLiteral(trimmed) ? stripQuotes(trimmed) : '*' + trimmed;
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.splice(key, 1);
+      return
+    }
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
+      warn(
+        'Avoid deleting properties on a Vue instance or its root $data ' +
+        '- just set it to null.'
+      );
+      return
+    }
+    if (!hasOwn(target, key)) {
+      return
+    }
+    delete target[key];
+    if (!ob) {
+      return
+    }
+    ob.dep.notify();
   }
 
   /**
-   * Parse a string path into an array of segments
-   *
-   * @param {String} path
-   * @return {Array|undefined}
+   * Collect dependencies on array elements when the array is touched, since
+   * we cannot intercept array element access like property getters.
    */
-
-  function parse(path) {
-    var keys = [];
-    var index = -1;
-    var mode = BEFORE_PATH;
-    var subPathDepth = 0;
-    var c, newChar, key, type, transition, action, typeMap;
-
-    var actions = [];
-
-    actions[PUSH] = function () {
-      if (key !== undefined) {
-        keys.push(key);
-        key = undefined;
-      }
-    };
-
-    actions[APPEND] = function () {
-      if (key === undefined) {
-        key = newChar;
-      } else {
-        key += newChar;
-      }
-    };
-
-    actions[INC_SUB_PATH_DEPTH] = function () {
-      actions[APPEND]();
-      subPathDepth++;
-    };
-
-    actions[PUSH_SUB_PATH] = function () {
-      if (subPathDepth > 0) {
-        subPathDepth--;
-        mode = IN_SUB_PATH;
-        actions[APPEND]();
-      } else {
-        subPathDepth = 0;
-        key = formatSubPath(key);
-        if (key === false) {
-          return false;
-        } else {
-          actions[PUSH]();
-        }
-      }
-    };
-
-    function maybeUnescapeQuote() {
-      var nextChar = path[index + 1];
-      if (mode === IN_SINGLE_QUOTE && nextChar === "'" || mode === IN_DOUBLE_QUOTE && nextChar === '"') {
-        index++;
-        newChar = '\\' + nextChar;
-        actions[APPEND]();
-        return true;
-      }
-    }
-
-    while (mode != null) {
-      index++;
-      c = path[index];
-
-      if (c === '\\' && maybeUnescapeQuote()) {
-        continue;
-      }
-
-      type = getPathCharType(c);
-      typeMap = pathStateMachine[mode];
-      transition = typeMap[type] || typeMap['else'] || ERROR;
-
-      if (transition === ERROR) {
-        return; // parse error
-      }
-
-      mode = transition[0];
-      action = actions[transition[1]];
-      if (action) {
-        newChar = transition[2];
-        newChar = newChar === undefined ? c : newChar;
-        if (action() === false) {
-          return;
-        }
-      }
-
-      if (mode === AFTER_PATH) {
-        keys.raw = path;
-        return keys;
+  function dependArray (value) {
+    for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+      e = value[i];
+      e && e.__ob__ && e.__ob__.dep.depend();
+      if (Array.isArray(e)) {
+        dependArray(e);
       }
     }
   }
 
-  /**
-   * External parse that check for a cache hit first
-   *
-   * @param {String} path
-   * @return {Array|undefined}
-   */
+  /*  */
 
-  function parsePath(path) {
-    var hit = pathCache.get(path);
-    if (!hit) {
-      hit = parse(path);
-      if (hit) {
-        pathCache.put(path, hit);
+  /**
+   * Option overwriting strategies are functions that handle
+   * how to merge a parent option value and a child option
+   * value into the final value.
+   */
+  var strats = config.optionMergeStrategies;
+
+  /**
+   * Options with restrictions
+   */
+  {
+    strats.el = strats.propsData = function (parent, child, vm, key) {
+      if (!vm) {
+        warn(
+          "option \"" + key + "\" can only be used during instance " +
+          'creation with the `new` keyword.'
+        );
       }
-    }
-    return hit;
-  }
-
-  /**
-   * Get from an object from a path string
-   *
-   * @param {Object} obj
-   * @param {String} path
-   */
-
-  function getPath(obj, path) {
-    return parseExpression(path).get(obj);
-  }
-
-  /**
-   * Warn against setting non-existent root path on a vm.
-   */
-
-  var warnNonExistent;
-  if ('development' !== 'production') {
-    warnNonExistent = function (path, vm) {
-      warn('You are setting a non-existent path "' + path.raw + '" ' + 'on a vm instance. Consider pre-initializing the property ' + 'with the "data" option for more reliable reactivity ' + 'and better performance.', vm);
+      return defaultStrat(parent, child)
     };
   }
 
   /**
-   * Set on an object from a path
-   *
-   * @param {Object} obj
-   * @param {String | Array} path
-   * @param {*} val
+   * Helper that recursively merges two data objects together.
    */
+  function mergeData (to, from) {
+    if (!from) { return to }
+    var key, toVal, fromVal;
 
-  function setPath(obj, path, val) {
-    var original = obj;
-    if (typeof path === 'string') {
-      path = parse(path);
-    }
-    if (!path || !isObject(obj)) {
-      return false;
-    }
-    var last, key;
-    for (var i = 0, l = path.length; i < l; i++) {
-      last = obj;
-      key = path[i];
-      if (key.charAt(0) === '*') {
-        key = parseExpression(key.slice(1)).get.call(original, original);
-      }
-      if (i < l - 1) {
-        obj = obj[key];
-        if (!isObject(obj)) {
-          obj = {};
-          if ('development' !== 'production' && last._isVue) {
-            warnNonExistent(path, last);
-          }
-          set(last, key, obj);
-        }
-      } else {
-        if (isArray(obj)) {
-          obj.$set(key, val);
-        } else if (key in obj) {
-          obj[key] = val;
-        } else {
-          if ('development' !== 'production' && obj._isVue) {
-            warnNonExistent(path, obj);
-          }
-          set(obj, key, val);
-        }
+    var keys = hasSymbol
+      ? Reflect.ownKeys(from)
+      : Object.keys(from);
+
+    for (var i = 0; i < keys.length; i++) {
+      key = keys[i];
+      // in case the object is already observed...
+      if (key === '__ob__') { continue }
+      toVal = to[key];
+      fromVal = from[key];
+      if (!hasOwn(to, key)) {
+        set(to, key, fromVal);
+      } else if (
+        toVal !== fromVal &&
+        isPlainObject(toVal) &&
+        isPlainObject(fromVal)
+      ) {
+        mergeData(toVal, fromVal);
       }
     }
-    return true;
-  }
-
-var path = Object.freeze({
-    parsePath: parsePath,
-    getPath: getPath,
-    setPath: setPath
-  });
-
-  var expressionCache = new Cache(1000);
-
-  var allowedKeywords = 'Math,Date,this,true,false,null,undefined,Infinity,NaN,' + 'isNaN,isFinite,decodeURI,decodeURIComponent,encodeURI,' + 'encodeURIComponent,parseInt,parseFloat';
-  var allowedKeywordsRE = new RegExp('^(' + allowedKeywords.replace(/,/g, '\\b|') + '\\b)');
-
-  // keywords that don't make sense inside expressions
-  var improperKeywords = 'break,case,class,catch,const,continue,debugger,default,' + 'delete,do,else,export,extends,finally,for,function,if,' + 'import,in,instanceof,let,return,super,switch,throw,try,' + 'var,while,with,yield,enum,await,implements,package,' + 'protected,static,interface,private,public';
-  var improperKeywordsRE = new RegExp('^(' + improperKeywords.replace(/,/g, '\\b|') + '\\b)');
-
-  var wsRE = /\s/g;
-  var newlineRE = /\n/g;
-  var saveRE = /[\{,]\s*[\w\$_]+\s*:|('(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`)|new |typeof |void /g;
-  var restoreRE = /"(\d+)"/g;
-  var pathTestRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?'\]|\[".*?"\]|\[\d+\]|\[[A-Za-z_$][\w$]*\])*$/;
-  var identRE = /[^\w$\.](?:[A-Za-z_$][\w$]*)/g;
-  var literalValueRE$1 = /^(?:true|false|null|undefined|Infinity|NaN)$/;
-
-  function noop() {}
-
-  /**
-   * Save / Rewrite / Restore
-   *
-   * When rewriting paths found in an expression, it is
-   * possible for the same letter sequences to be found in
-   * strings and Object literal property keys. Therefore we
-   * remove and store these parts in a temporary array, and
-   * restore them after the path rewrite.
-   */
-
-  var saved = [];
-
-  /**
-   * Save replacer
-   *
-   * The save regex can match two possible cases:
-   * 1. An opening object literal
-   * 2. A string
-   * If matched as a plain string, we need to escape its
-   * newlines, since the string needs to be preserved when
-   * generating the function body.
-   *
-   * @param {String} str
-   * @param {String} isString - str if matched as a string
-   * @return {String} - placeholder with index
-   */
-
-  function save(str, isString) {
-    var i = saved.length;
-    saved[i] = isString ? str.replace(newlineRE, '\\n') : str;
-    return '"' + i + '"';
+    return to
   }
 
   /**
-   * Path rewrite replacer
-   *
-   * @param {String} raw
-   * @return {String}
+   * Data
    */
-
-  function rewrite(raw) {
-    var c = raw.charAt(0);
-    var path = raw.slice(1);
-    if (allowedKeywordsRE.test(path)) {
-      return raw;
+  function mergeDataOrFn (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      // in a Vue.extend merge, both should be functions
+      if (!childVal) {
+        return parentVal
+      }
+      if (!parentVal) {
+        return childVal
+      }
+      // when parentVal & childVal are both present,
+      // we need to return a function that returns the
+      // merged result of both functions... no need to
+      // check if parentVal is a function here because
+      // it has to be a function to pass previous merges.
+      return function mergedDataFn () {
+        return mergeData(
+          typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+          typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+        )
+      }
     } else {
-      path = path.indexOf('"') > -1 ? path.replace(restoreRE, restore) : path;
-      return c + 'scope.' + path;
-    }
-  }
-
-  /**
-   * Restore replacer
-   *
-   * @param {String} str
-   * @param {String} i - matched save index
-   * @return {String}
-   */
-
-  function restore(str, i) {
-    return saved[i];
-  }
-
-  /**
-   * Rewrite an expression, prefixing all path accessors with
-   * `scope.` and generate getter/setter functions.
-   *
-   * @param {String} exp
-   * @return {Function}
-   */
-
-  function compileGetter(exp) {
-    if (improperKeywordsRE.test(exp)) {
-      'development' !== 'production' && warn('Avoid using reserved keywords in expression: ' + exp);
-    }
-    // reset state
-    saved.length = 0;
-    // save strings and object literal keys
-    var body = exp.replace(saveRE, save).replace(wsRE, '');
-    // rewrite all paths
-    // pad 1 space here because the regex matches 1 extra char
-    body = (' ' + body).replace(identRE, rewrite).replace(restoreRE, restore);
-    return makeGetterFn(body);
-  }
-
-  /**
-   * Build a getter function. Requires eval.
-   *
-   * We isolate the try/catch so it doesn't affect the
-   * optimization of the parse function when it is not called.
-   *
-   * @param {String} body
-   * @return {Function|undefined}
-   */
-
-  function makeGetterFn(body) {
-    try {
-      /* eslint-disable no-new-func */
-      return new Function('scope', 'return ' + body + ';');
-      /* eslint-enable no-new-func */
-    } catch (e) {
-      if ('development' !== 'production') {
-        /* istanbul ignore if */
-        if (e.toString().match(/unsafe-eval|CSP/)) {
-          warn('It seems you are using the default build of Vue.js in an environment ' + 'with Content Security Policy that prohibits unsafe-eval. ' + 'Use the CSP-compliant build instead: ' + 'http://vuejs.org/guide/installation.html#CSP-compliant-build');
+      return function mergedInstanceDataFn () {
+        // instance merge
+        var instanceData = typeof childVal === 'function'
+          ? childVal.call(vm, vm)
+          : childVal;
+        var defaultData = typeof parentVal === 'function'
+          ? parentVal.call(vm, vm)
+          : parentVal;
+        if (instanceData) {
+          return mergeData(instanceData, defaultData)
         } else {
-          warn('Invalid expression. ' + 'Generated function body: ' + body);
+          return defaultData
         }
       }
-      return noop;
+    }
+  }
+
+  strats.data = function (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      if (childVal && typeof childVal !== 'function') {
+        warn(
+          'The "data" option should be a function ' +
+          'that returns a per-instance value in component ' +
+          'definitions.',
+          vm
+        );
+
+        return parentVal
+      }
+      return mergeDataOrFn(parentVal, childVal)
+    }
+
+    return mergeDataOrFn(parentVal, childVal, vm)
+  };
+
+  /**
+   * Hooks and props are merged as arrays.
+   */
+  function mergeHook (
+    parentVal,
+    childVal
+  ) {
+    var res = childVal
+      ? parentVal
+        ? parentVal.concat(childVal)
+        : Array.isArray(childVal)
+          ? childVal
+          : [childVal]
+      : parentVal;
+    return res
+      ? dedupeHooks(res)
+      : res
+  }
+
+  function dedupeHooks (hooks) {
+    var res = [];
+    for (var i = 0; i < hooks.length; i++) {
+      if (res.indexOf(hooks[i]) === -1) {
+        res.push(hooks[i]);
+      }
+    }
+    return res
+  }
+
+  LIFECYCLE_HOOKS.forEach(function (hook) {
+    strats[hook] = mergeHook;
+  });
+
+  /**
+   * Assets
+   *
+   * When a vm is present (instance creation), we need to do
+   * a three-way merge between constructor options, instance
+   * options and parent options.
+   */
+  function mergeAssets (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    var res = Object.create(parentVal || null);
+    if (childVal) {
+      assertObjectType(key, childVal, vm);
+      return extend(res, childVal)
+    } else {
+      return res
+    }
+  }
+
+  ASSET_TYPES.forEach(function (type) {
+    strats[type + 's'] = mergeAssets;
+  });
+
+  /**
+   * Watchers.
+   *
+   * Watchers hashes should not overwrite one
+   * another, so we merge them as arrays.
+   */
+  strats.watch = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    // work around Firefox's Object.prototype.watch...
+    if (parentVal === nativeWatch) { parentVal = undefined; }
+    if (childVal === nativeWatch) { childVal = undefined; }
+    /* istanbul ignore if */
+    if (!childVal) { return Object.create(parentVal || null) }
+    {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = {};
+    extend(ret, parentVal);
+    for (var key$1 in childVal) {
+      var parent = ret[key$1];
+      var child = childVal[key$1];
+      if (parent && !Array.isArray(parent)) {
+        parent = [parent];
+      }
+      ret[key$1] = parent
+        ? parent.concat(child)
+        : Array.isArray(child) ? child : [child];
+    }
+    return ret
+  };
+
+  /**
+   * Other object hashes.
+   */
+  strats.props =
+  strats.methods =
+  strats.inject =
+  strats.computed = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    if (childVal && "development" !== 'production') {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = Object.create(null);
+    extend(ret, parentVal);
+    if (childVal) { extend(ret, childVal); }
+    return ret
+  };
+  strats.provide = mergeDataOrFn;
+
+  /**
+   * Default strategy.
+   */
+  var defaultStrat = function (parentVal, childVal) {
+    return childVal === undefined
+      ? parentVal
+      : childVal
+  };
+
+  /**
+   * Validate component names
+   */
+  function checkComponents (options) {
+    for (var key in options.components) {
+      validateComponentName(key);
+    }
+  }
+
+  function validateComponentName (name) {
+    if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+      warn(
+        'Invalid component name: "' + name + '". Component names ' +
+        'should conform to valid custom element name in html5 specification.'
+      );
+    }
+    if (isBuiltInTag(name) || config.isReservedTag(name)) {
+      warn(
+        'Do not use built-in or reserved HTML elements as component ' +
+        'id: ' + name
+      );
     }
   }
 
   /**
-   * Compile a setter function for the expression.
-   *
-   * @param {String} exp
-   * @return {Function|undefined}
+   * Ensure all props option syntax are normalized into the
+   * Object-based format.
    */
+  function normalizeProps (options, vm) {
+    var props = options.props;
+    if (!props) { return }
+    var res = {};
+    var i, val, name;
+    if (Array.isArray(props)) {
+      i = props.length;
+      while (i--) {
+        val = props[i];
+        if (typeof val === 'string') {
+          name = camelize(val);
+          res[name] = { type: null };
+        } else {
+          warn('props must be strings when using array syntax.');
+        }
+      }
+    } else if (isPlainObject(props)) {
+      for (var key in props) {
+        val = props[key];
+        name = camelize(key);
+        res[name] = isPlainObject(val)
+          ? val
+          : { type: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"props\": expected an Array or an Object, " +
+        "but got " + (toRawType(props)) + ".",
+        vm
+      );
+    }
+    options.props = res;
+  }
 
-  function compileSetter(exp) {
-    var path = parsePath(exp);
-    if (path) {
-      return function (scope, val) {
-        setPath(scope, path, val);
+  /**
+   * Normalize all injections into Object-based format
+   */
+  function normalizeInject (options, vm) {
+    var inject = options.inject;
+    if (!inject) { return }
+    var normalized = options.inject = {};
+    if (Array.isArray(inject)) {
+      for (var i = 0; i < inject.length; i++) {
+        normalized[inject[i]] = { from: inject[i] };
+      }
+    } else if (isPlainObject(inject)) {
+      for (var key in inject) {
+        var val = inject[key];
+        normalized[key] = isPlainObject(val)
+          ? extend({ from: key }, val)
+          : { from: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"inject\": expected an Array or an Object, " +
+        "but got " + (toRawType(inject)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Normalize raw function directives into object format.
+   */
+  function normalizeDirectives (options) {
+    var dirs = options.directives;
+    if (dirs) {
+      for (var key in dirs) {
+        var def$$1 = dirs[key];
+        if (typeof def$$1 === 'function') {
+          dirs[key] = { bind: def$$1, update: def$$1 };
+        }
+      }
+    }
+  }
+
+  function assertObjectType (name, value, vm) {
+    if (!isPlainObject(value)) {
+      warn(
+        "Invalid value for option \"" + name + "\": expected an Object, " +
+        "but got " + (toRawType(value)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Merge two option objects into a new one.
+   * Core utility used in both instantiation and inheritance.
+   */
+  function mergeOptions (
+    parent,
+    child,
+    vm
+  ) {
+    {
+      checkComponents(child);
+    }
+
+    if (typeof child === 'function') {
+      child = child.options;
+    }
+
+    normalizeProps(child, vm);
+    normalizeInject(child, vm);
+    normalizeDirectives(child);
+
+    // Apply extends and mixins on the child options,
+    // but only if it is a raw options object that isn't
+    // the result of another mergeOptions call.
+    // Only merged options has the _base property.
+    if (!child._base) {
+      if (child.extends) {
+        parent = mergeOptions(parent, child.extends, vm);
+      }
+      if (child.mixins) {
+        for (var i = 0, l = child.mixins.length; i < l; i++) {
+          parent = mergeOptions(parent, child.mixins[i], vm);
+        }
+      }
+    }
+
+    var options = {};
+    var key;
+    for (key in parent) {
+      mergeField(key);
+    }
+    for (key in child) {
+      if (!hasOwn(parent, key)) {
+        mergeField(key);
+      }
+    }
+    function mergeField (key) {
+      var strat = strats[key] || defaultStrat;
+      options[key] = strat(parent[key], child[key], vm, key);
+    }
+    return options
+  }
+
+  /**
+   * Resolve an asset.
+   * This function is used because child instances need access
+   * to assets defined in its ancestor chain.
+   */
+  function resolveAsset (
+    options,
+    type,
+    id,
+    warnMissing
+  ) {
+    /* istanbul ignore if */
+    if (typeof id !== 'string') {
+      return
+    }
+    var assets = options[type];
+    // check local registration variations first
+    if (hasOwn(assets, id)) { return assets[id] }
+    var camelizedId = camelize(id);
+    if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+    var PascalCaseId = capitalize(camelizedId);
+    if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+    // fallback to prototype chain
+    var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+    if (warnMissing && !res) {
+      warn(
+        'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+        options
+      );
+    }
+    return res
+  }
+
+  /*  */
+
+
+
+  function validateProp (
+    key,
+    propOptions,
+    propsData,
+    vm
+  ) {
+    var prop = propOptions[key];
+    var absent = !hasOwn(propsData, key);
+    var value = propsData[key];
+    // boolean casting
+    var booleanIndex = getTypeIndex(Boolean, prop.type);
+    if (booleanIndex > -1) {
+      if (absent && !hasOwn(prop, 'default')) {
+        value = false;
+      } else if (value === '' || value === hyphenate(key)) {
+        // only cast empty string / same name to boolean if
+        // boolean has higher priority
+        var stringIndex = getTypeIndex(String, prop.type);
+        if (stringIndex < 0 || booleanIndex < stringIndex) {
+          value = true;
+        }
+      }
+    }
+    // check default value
+    if (value === undefined) {
+      value = getPropDefaultValue(vm, prop, key);
+      // since the default value is a fresh copy,
+      // make sure to observe it.
+      var prevShouldObserve = shouldObserve;
+      toggleObserving(true);
+      observe(value);
+      toggleObserving(prevShouldObserve);
+    }
+    {
+      assertProp(prop, key, value, vm, absent);
+    }
+    return value
+  }
+
+  /**
+   * Get the default value of a prop.
+   */
+  function getPropDefaultValue (vm, prop, key) {
+    // no default, return undefined
+    if (!hasOwn(prop, 'default')) {
+      return undefined
+    }
+    var def = prop.default;
+    // warn against non-factory defaults for Object & Array
+    if (isObject(def)) {
+      warn(
+        'Invalid default value for prop "' + key + '": ' +
+        'Props with type Object/Array must use a factory function ' +
+        'to return the default value.',
+        vm
+      );
+    }
+    // the raw prop value was also undefined from previous render,
+    // return previous default value to avoid unnecessary watcher trigger
+    if (vm && vm.$options.propsData &&
+      vm.$options.propsData[key] === undefined &&
+      vm._props[key] !== undefined
+    ) {
+      return vm._props[key]
+    }
+    // call factory function for non-Function types
+    // a value is Function if its prototype is function even across different execution context
+    return typeof def === 'function' && getType(prop.type) !== 'Function'
+      ? def.call(vm)
+      : def
+  }
+
+  /**
+   * Assert whether a prop is valid.
+   */
+  function assertProp (
+    prop,
+    name,
+    value,
+    vm,
+    absent
+  ) {
+    if (prop.required && absent) {
+      warn(
+        'Missing required prop: "' + name + '"',
+        vm
+      );
+      return
+    }
+    if (value == null && !prop.required) {
+      return
+    }
+    var type = prop.type;
+    var valid = !type || type === true;
+    var expectedTypes = [];
+    if (type) {
+      if (!Array.isArray(type)) {
+        type = [type];
+      }
+      for (var i = 0; i < type.length && !valid; i++) {
+        var assertedType = assertType(value, type[i], vm);
+        expectedTypes.push(assertedType.expectedType || '');
+        valid = assertedType.valid;
+      }
+    }
+
+    var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
+    if (!valid && haveExpectedTypes) {
+      warn(
+        getInvalidTypeMessage(name, value, expectedTypes),
+        vm
+      );
+      return
+    }
+    var validator = prop.validator;
+    if (validator) {
+      if (!validator(value)) {
+        warn(
+          'Invalid prop: custom validator check failed for prop "' + name + '".',
+          vm
+        );
+      }
+    }
+  }
+
+  var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
+
+  function assertType (value, type, vm) {
+    var valid;
+    var expectedType = getType(type);
+    if (simpleCheckRE.test(expectedType)) {
+      var t = typeof value;
+      valid = t === expectedType.toLowerCase();
+      // for primitive wrapper objects
+      if (!valid && t === 'object') {
+        valid = value instanceof type;
+      }
+    } else if (expectedType === 'Object') {
+      valid = isPlainObject(value);
+    } else if (expectedType === 'Array') {
+      valid = Array.isArray(value);
+    } else {
+      try {
+        valid = value instanceof type;
+      } catch (e) {
+        warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+        valid = false;
+      }
+    }
+    return {
+      valid: valid,
+      expectedType: expectedType
+    }
+  }
+
+  var functionTypeCheckRE = /^\s*function (\w+)/;
+
+  /**
+   * Use function string name to check built-in types,
+   * because a simple equality check will fail when running
+   * across different vms / iframes.
+   */
+  function getType (fn) {
+    var match = fn && fn.toString().match(functionTypeCheckRE);
+    return match ? match[1] : ''
+  }
+
+  function isSameType (a, b) {
+    return getType(a) === getType(b)
+  }
+
+  function getTypeIndex (type, expectedTypes) {
+    if (!Array.isArray(expectedTypes)) {
+      return isSameType(expectedTypes, type) ? 0 : -1
+    }
+    for (var i = 0, len = expectedTypes.length; i < len; i++) {
+      if (isSameType(expectedTypes[i], type)) {
+        return i
+      }
+    }
+    return -1
+  }
+
+  function getInvalidTypeMessage (name, value, expectedTypes) {
+    var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+      " Expected " + (expectedTypes.map(capitalize).join(', '));
+    var expectedType = expectedTypes[0];
+    var receivedType = toRawType(value);
+    // check if we need to specify expected value
+    if (
+      expectedTypes.length === 1 &&
+      isExplicable(expectedType) &&
+      isExplicable(typeof value) &&
+      !isBoolean(expectedType, receivedType)
+    ) {
+      message += " with value " + (styleValue(value, expectedType));
+    }
+    message += ", got " + receivedType + " ";
+    // check if we need to specify received value
+    if (isExplicable(receivedType)) {
+      message += "with value " + (styleValue(value, receivedType)) + ".";
+    }
+    return message
+  }
+
+  function styleValue (value, type) {
+    if (type === 'String') {
+      return ("\"" + value + "\"")
+    } else if (type === 'Number') {
+      return ("" + (Number(value)))
+    } else {
+      return ("" + value)
+    }
+  }
+
+  var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+  function isExplicable (value) {
+    return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
+  }
+
+  function isBoolean () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+  }
+
+  /*  */
+
+  function handleError (err, vm, info) {
+    // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+    // See: https://github.com/vuejs/vuex/issues/1505
+    pushTarget();
+    try {
+      if (vm) {
+        var cur = vm;
+        while ((cur = cur.$parent)) {
+          var hooks = cur.$options.errorCaptured;
+          if (hooks) {
+            for (var i = 0; i < hooks.length; i++) {
+              try {
+                var capture = hooks[i].call(cur, err, vm, info) === false;
+                if (capture) { return }
+              } catch (e) {
+                globalHandleError(e, cur, 'errorCaptured hook');
+              }
+            }
+          }
+        }
+      }
+      globalHandleError(err, vm, info);
+    } finally {
+      popTarget();
+    }
+  }
+
+  function invokeWithErrorHandling (
+    handler,
+    context,
+    args,
+    vm,
+    info
+  ) {
+    var res;
+    try {
+      res = args ? handler.apply(context, args) : handler.call(context);
+      if (res && !res._isVue && isPromise(res) && !res._handled) {
+        res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+        // issue #9511
+        // avoid catch triggering multiple times when nested calls
+        res._handled = true;
+      }
+    } catch (e) {
+      handleError(e, vm, info);
+    }
+    return res
+  }
+
+  function globalHandleError (err, vm, info) {
+    if (config.errorHandler) {
+      try {
+        return config.errorHandler.call(null, err, vm, info)
+      } catch (e) {
+        // if the user intentionally throws the original error in the handler,
+        // do not log it twice
+        if (e !== err) {
+          logError(e, null, 'config.errorHandler');
+        }
+      }
+    }
+    logError(err, vm, info);
+  }
+
+  function logError (err, vm, info) {
+    {
+      warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+    }
+    /* istanbul ignore else */
+    if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+      console.error(err);
+    } else {
+      throw err
+    }
+  }
+
+  /*  */
+
+  var isUsingMicroTask = false;
+
+  var callbacks = [];
+  var pending = false;
+
+  function flushCallbacks () {
+    pending = false;
+    var copies = callbacks.slice(0);
+    callbacks.length = 0;
+    for (var i = 0; i < copies.length; i++) {
+      copies[i]();
+    }
+  }
+
+  // Here we have async deferring wrappers using microtasks.
+  // In 2.5 we used (macro) tasks (in combination with microtasks).
+  // However, it has subtle problems when state is changed right before repaint
+  // (e.g. #6813, out-in transitions).
+  // Also, using (macro) tasks in event handler would cause some weird behaviors
+  // that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+  // So we now use microtasks everywhere, again.
+  // A major drawback of this tradeoff is that there are some scenarios
+  // where microtasks have too high a priority and fire in between supposedly
+  // sequential events (e.g. #4521, #6690, which have workarounds)
+  // or even between bubbling of the same event (#6566).
+  var timerFunc;
+
+  // The nextTick behavior leverages the microtask queue, which can be accessed
+  // via either native Promise.then or MutationObserver.
+  // MutationObserver has wider support, however it is seriously bugged in
+  // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+  // completely stops working after triggering a few times... so, if native
+  // Promise is available, we will use it:
+  /* istanbul ignore next, $flow-disable-line */
+  if (typeof Promise !== 'undefined' && isNative(Promise)) {
+    var p = Promise.resolve();
+    timerFunc = function () {
+      p.then(flushCallbacks);
+      // In problematic UIWebViews, Promise.then doesn't completely break, but
+      // it can get stuck in a weird state where callbacks are pushed into the
+      // microtask queue but the queue isn't being flushed, until the browser
+      // needs to do some other work, e.g. handle a timer. Therefore we can
+      // "force" the microtask queue to be flushed by adding an empty timer.
+      if (isIOS) { setTimeout(noop); }
+    };
+    isUsingMicroTask = true;
+  } else if (!isIE && typeof MutationObserver !== 'undefined' && (
+    isNative(MutationObserver) ||
+    // PhantomJS and iOS 7.x
+    MutationObserver.toString() === '[object MutationObserverConstructor]'
+  )) {
+    // Use MutationObserver where native Promise is not available,
+    // e.g. PhantomJS, iOS7, Android 4.4
+    // (#6466 MutationObserver is unreliable in IE11)
+    var counter = 1;
+    var observer = new MutationObserver(flushCallbacks);
+    var textNode = document.createTextNode(String(counter));
+    observer.observe(textNode, {
+      characterData: true
+    });
+    timerFunc = function () {
+      counter = (counter + 1) % 2;
+      textNode.data = String(counter);
+    };
+    isUsingMicroTask = true;
+  } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+    // Fallback to setImmediate.
+    // Technically it leverages the (macro) task queue,
+    // but it is still a better choice than setTimeout.
+    timerFunc = function () {
+      setImmediate(flushCallbacks);
+    };
+  } else {
+    // Fallback to setTimeout.
+    timerFunc = function () {
+      setTimeout(flushCallbacks, 0);
+    };
+  }
+
+  function nextTick (cb, ctx) {
+    var _resolve;
+    callbacks.push(function () {
+      if (cb) {
+        try {
+          cb.call(ctx);
+        } catch (e) {
+          handleError(e, ctx, 'nextTick');
+        }
+      } else if (_resolve) {
+        _resolve(ctx);
+      }
+    });
+    if (!pending) {
+      pending = true;
+      timerFunc();
+    }
+    // $flow-disable-line
+    if (!cb && typeof Promise !== 'undefined') {
+      return new Promise(function (resolve) {
+        _resolve = resolve;
+      })
+    }
+  }
+
+  /*  */
+
+  var mark;
+  var measure;
+
+  {
+    var perf = inBrowser && window.performance;
+    /* istanbul ignore if */
+    if (
+      perf &&
+      perf.mark &&
+      perf.measure &&
+      perf.clearMarks &&
+      perf.clearMeasures
+    ) {
+      mark = function (tag) { return perf.mark(tag); };
+      measure = function (name, startTag, endTag) {
+        perf.measure(name, startTag, endTag);
+        perf.clearMarks(startTag);
+        perf.clearMarks(endTag);
+        // perf.clearMeasures(name)
+      };
+    }
+  }
+
+  /* not type checking this file because flow doesn't play well with Proxy */
+
+  var initProxy;
+
+  {
+    var allowedGlobals = makeMap(
+      'Infinity,undefined,NaN,isFinite,isNaN,' +
+      'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+      'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
+      'require' // for Webpack/Browserify
+    );
+
+    var warnNonPresent = function (target, key) {
+      warn(
+        "Property or method \"" + key + "\" is not defined on the instance but " +
+        'referenced during render. Make sure that this property is reactive, ' +
+        'either in the data option, or for class-based components, by ' +
+        'initializing the property. ' +
+        'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+        target
+      );
+    };
+
+    var warnReservedPrefix = function (target, key) {
+      warn(
+        "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+        'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+        'prevent conflicts with Vue internals. ' +
+        'See: https://vuejs.org/v2/api/#data',
+        target
+      );
+    };
+
+    var hasProxy =
+      typeof Proxy !== 'undefined' && isNative(Proxy);
+
+    if (hasProxy) {
+      var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+      config.keyCodes = new Proxy(config.keyCodes, {
+        set: function set (target, key, value) {
+          if (isBuiltInModifier(key)) {
+            warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+            return false
+          } else {
+            target[key] = value;
+            return true
+          }
+        }
+      });
+    }
+
+    var hasHandler = {
+      has: function has (target, key) {
+        var has = key in target;
+        var isAllowed = allowedGlobals(key) ||
+          (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+        if (!has && !isAllowed) {
+          if (key in target.$data) { warnReservedPrefix(target, key); }
+          else { warnNonPresent(target, key); }
+        }
+        return has || !isAllowed
+      }
+    };
+
+    var getHandler = {
+      get: function get (target, key) {
+        if (typeof key === 'string' && !(key in target)) {
+          if (key in target.$data) { warnReservedPrefix(target, key); }
+          else { warnNonPresent(target, key); }
+        }
+        return target[key]
+      }
+    };
+
+    initProxy = function initProxy (vm) {
+      if (hasProxy) {
+        // determine which proxy handler to use
+        var options = vm.$options;
+        var handlers = options.render && options.render._withStripped
+          ? getHandler
+          : hasHandler;
+        vm._renderProxy = new Proxy(vm, handlers);
+      } else {
+        vm._renderProxy = vm;
+      }
+    };
+  }
+
+  /*  */
+
+  var seenObjects = new _Set();
+
+  /**
+   * Recursively traverse an object to evoke all converted
+   * getters, so that every nested property inside the object
+   * is collected as a "deep" dependency.
+   */
+  function traverse (val) {
+    _traverse(val, seenObjects);
+    seenObjects.clear();
+  }
+
+  function _traverse (val, seen) {
+    var i, keys;
+    var isA = Array.isArray(val);
+    if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+      return
+    }
+    if (val.__ob__) {
+      var depId = val.__ob__.dep.id;
+      if (seen.has(depId)) {
+        return
+      }
+      seen.add(depId);
+    }
+    if (isA) {
+      i = val.length;
+      while (i--) { _traverse(val[i], seen); }
+    } else {
+      keys = Object.keys(val);
+      i = keys.length;
+      while (i--) { _traverse(val[keys[i]], seen); }
+    }
+  }
+
+  /*  */
+
+  var normalizeEvent = cached(function (name) {
+    var passive = name.charAt(0) === '&';
+    name = passive ? name.slice(1) : name;
+    var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+    name = once$$1 ? name.slice(1) : name;
+    var capture = name.charAt(0) === '!';
+    name = capture ? name.slice(1) : name;
+    return {
+      name: name,
+      once: once$$1,
+      capture: capture,
+      passive: passive
+    }
+  });
+
+  function createFnInvoker (fns, vm) {
+    function invoker () {
+      var arguments$1 = arguments;
+
+      var fns = invoker.fns;
+      if (Array.isArray(fns)) {
+        var cloned = fns.slice();
+        for (var i = 0; i < cloned.length; i++) {
+          invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+        }
+      } else {
+        // return handler return value for single handlers
+        return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+      }
+    }
+    invoker.fns = fns;
+    return invoker
+  }
+
+  function updateListeners (
+    on,
+    oldOn,
+    add,
+    remove$$1,
+    createOnceHandler,
+    vm
+  ) {
+    var name, def$$1, cur, old, event;
+    for (name in on) {
+      def$$1 = cur = on[name];
+      old = oldOn[name];
+      event = normalizeEvent(name);
+      if (isUndef(cur)) {
+        warn(
+          "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+          vm
+        );
+      } else if (isUndef(old)) {
+        if (isUndef(cur.fns)) {
+          cur = on[name] = createFnInvoker(cur, vm);
+        }
+        if (isTrue(event.once)) {
+          cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+        }
+        add(event.name, cur, event.capture, event.passive, event.params);
+      } else if (cur !== old) {
+        old.fns = cur;
+        on[name] = old;
+      }
+    }
+    for (name in oldOn) {
+      if (isUndef(on[name])) {
+        event = normalizeEvent(name);
+        remove$$1(event.name, oldOn[name], event.capture);
+      }
+    }
+  }
+
+  /*  */
+
+  function mergeVNodeHook (def, hookKey, hook) {
+    if (def instanceof VNode) {
+      def = def.data.hook || (def.data.hook = {});
+    }
+    var invoker;
+    var oldHook = def[hookKey];
+
+    function wrappedHook () {
+      hook.apply(this, arguments);
+      // important: remove merged hook to ensure it's called only once
+      // and prevent memory leak
+      remove(invoker.fns, wrappedHook);
+    }
+
+    if (isUndef(oldHook)) {
+      // no existing hook
+      invoker = createFnInvoker([wrappedHook]);
+    } else {
+      /* istanbul ignore if */
+      if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+        // already a merged invoker
+        invoker = oldHook;
+        invoker.fns.push(wrappedHook);
+      } else {
+        // existing plain hook
+        invoker = createFnInvoker([oldHook, wrappedHook]);
+      }
+    }
+
+    invoker.merged = true;
+    def[hookKey] = invoker;
+  }
+
+  /*  */
+
+  function extractPropsFromVNodeData (
+    data,
+    Ctor,
+    tag
+  ) {
+    // we are only extracting raw values here.
+    // validation and default values are handled in the child
+    // component itself.
+    var propOptions = Ctor.options.props;
+    if (isUndef(propOptions)) {
+      return
+    }
+    var res = {};
+    var attrs = data.attrs;
+    var props = data.props;
+    if (isDef(attrs) || isDef(props)) {
+      for (var key in propOptions) {
+        var altKey = hyphenate(key);
+        {
+          var keyInLowerCase = key.toLowerCase();
+          if (
+            key !== keyInLowerCase &&
+            attrs && hasOwn(attrs, keyInLowerCase)
+          ) {
+            tip(
+              "Prop \"" + keyInLowerCase + "\" is passed to component " +
+              (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+              " \"" + key + "\". " +
+              "Note that HTML attributes are case-insensitive and camelCased " +
+              "props need to use their kebab-case equivalents when using in-DOM " +
+              "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+            );
+          }
+        }
+        checkProp(res, props, key, altKey, true) ||
+        checkProp(res, attrs, key, altKey, false);
+      }
+    }
+    return res
+  }
+
+  function checkProp (
+    res,
+    hash,
+    key,
+    altKey,
+    preserve
+  ) {
+    if (isDef(hash)) {
+      if (hasOwn(hash, key)) {
+        res[key] = hash[key];
+        if (!preserve) {
+          delete hash[key];
+        }
+        return true
+      } else if (hasOwn(hash, altKey)) {
+        res[key] = hash[altKey];
+        if (!preserve) {
+          delete hash[altKey];
+        }
+        return true
+      }
+    }
+    return false
+  }
+
+  /*  */
+
+  // The template compiler attempts to minimize the need for normalization by
+  // statically analyzing the template at compile time.
+  //
+  // For plain HTML markup, normalization can be completely skipped because the
+  // generated render function is guaranteed to return Array<VNode>. There are
+  // two cases where extra normalization is needed:
+
+  // 1. When the children contains components - because a functional component
+  // may return an Array instead of a single root. In this case, just a simple
+  // normalization is needed - if any child is an Array, we flatten the whole
+  // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+  // because functional components already normalize their own children.
+  function simpleNormalizeChildren (children) {
+    for (var i = 0; i < children.length; i++) {
+      if (Array.isArray(children[i])) {
+        return Array.prototype.concat.apply([], children)
+      }
+    }
+    return children
+  }
+
+  // 2. When the children contains constructs that always generated nested Arrays,
+  // e.g. <template>, <slot>, v-for, or when the children is provided by user
+  // with hand-written render functions / JSX. In such cases a full normalization
+  // is needed to cater to all possible types of children values.
+  function normalizeChildren (children) {
+    return isPrimitive(children)
+      ? [createTextVNode(children)]
+      : Array.isArray(children)
+        ? normalizeArrayChildren(children)
+        : undefined
+  }
+
+  function isTextNode (node) {
+    return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+  }
+
+  function normalizeArrayChildren (children, nestedIndex) {
+    var res = [];
+    var i, c, lastIndex, last;
+    for (i = 0; i < children.length; i++) {
+      c = children[i];
+      if (isUndef(c) || typeof c === 'boolean') { continue }
+      lastIndex = res.length - 1;
+      last = res[lastIndex];
+      //  nested
+      if (Array.isArray(c)) {
+        if (c.length > 0) {
+          c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+          // merge adjacent text nodes
+          if (isTextNode(c[0]) && isTextNode(last)) {
+            res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+            c.shift();
+          }
+          res.push.apply(res, c);
+        }
+      } else if (isPrimitive(c)) {
+        if (isTextNode(last)) {
+          // merge adjacent text nodes
+          // this is necessary for SSR hydration because text nodes are
+          // essentially merged when rendered to HTML strings
+          res[lastIndex] = createTextVNode(last.text + c);
+        } else if (c !== '') {
+          // convert primitive to vnode
+          res.push(createTextVNode(c));
+        }
+      } else {
+        if (isTextNode(c) && isTextNode(last)) {
+          // merge adjacent text nodes
+          res[lastIndex] = createTextVNode(last.text + c.text);
+        } else {
+          // default key for nested array children (likely generated by v-for)
+          if (isTrue(children._isVList) &&
+            isDef(c.tag) &&
+            isUndef(c.key) &&
+            isDef(nestedIndex)) {
+            c.key = "__vlist" + nestedIndex + "_" + i + "__";
+          }
+          res.push(c);
+        }
+      }
+    }
+    return res
+  }
+
+  /*  */
+
+  function initProvide (vm) {
+    var provide = vm.$options.provide;
+    if (provide) {
+      vm._provided = typeof provide === 'function'
+        ? provide.call(vm)
+        : provide;
+    }
+  }
+
+  function initInjections (vm) {
+    var result = resolveInject(vm.$options.inject, vm);
+    if (result) {
+      toggleObserving(false);
+      Object.keys(result).forEach(function (key) {
+        /* istanbul ignore else */
+        {
+          defineReactive$$1(vm, key, result[key], function () {
+            warn(
+              "Avoid mutating an injected value directly since the changes will be " +
+              "overwritten whenever the provided component re-renders. " +
+              "injection being mutated: \"" + key + "\"",
+              vm
+            );
+          });
+        }
+      });
+      toggleObserving(true);
+    }
+  }
+
+  function resolveInject (inject, vm) {
+    if (inject) {
+      // inject is :any because flow is not smart enough to figure out cached
+      var result = Object.create(null);
+      var keys = hasSymbol
+        ? Reflect.ownKeys(inject)
+        : Object.keys(inject);
+
+      for (var i = 0; i < keys.length; i++) {
+        var key = keys[i];
+        // #6574 in case the inject object is observed...
+        if (key === '__ob__') { continue }
+        var provideKey = inject[key].from;
+        var source = vm;
+        while (source) {
+          if (source._provided && hasOwn(source._provided, provideKey)) {
+            result[key] = source._provided[provideKey];
+            break
+          }
+          source = source.$parent;
+        }
+        if (!source) {
+          if ('default' in inject[key]) {
+            var provideDefault = inject[key].default;
+            result[key] = typeof provideDefault === 'function'
+              ? provideDefault.call(vm)
+              : provideDefault;
+          } else {
+            warn(("Injection \"" + key + "\" not found"), vm);
+          }
+        }
+      }
+      return result
+    }
+  }
+
+  /*  */
+
+
+
+  /**
+   * Runtime helper for resolving raw children VNodes into a slot object.
+   */
+  function resolveSlots (
+    children,
+    context
+  ) {
+    if (!children || !children.length) {
+      return {}
+    }
+    var slots = {};
+    for (var i = 0, l = children.length; i < l; i++) {
+      var child = children[i];
+      var data = child.data;
+      // remove slot attribute if the node is resolved as a Vue slot node
+      if (data && data.attrs && data.attrs.slot) {
+        delete data.attrs.slot;
+      }
+      // named slots should only be respected if the vnode was rendered in the
+      // same context.
+      if ((child.context === context || child.fnContext === context) &&
+        data && data.slot != null
+      ) {
+        var name = data.slot;
+        var slot = (slots[name] || (slots[name] = []));
+        if (child.tag === 'template') {
+          slot.push.apply(slot, child.children || []);
+        } else {
+          slot.push(child);
+        }
+      } else {
+        (slots.default || (slots.default = [])).push(child);
+      }
+    }
+    // ignore slots that contains only whitespace
+    for (var name$1 in slots) {
+      if (slots[name$1].every(isWhitespace)) {
+        delete slots[name$1];
+      }
+    }
+    return slots
+  }
+
+  function isWhitespace (node) {
+    return (node.isComment && !node.asyncFactory) || node.text === ' '
+  }
+
+  /*  */
+
+  function isAsyncPlaceholder (node) {
+    return node.isComment && node.asyncFactory
+  }
+
+  /*  */
+
+  function normalizeScopedSlots (
+    slots,
+    normalSlots,
+    prevSlots
+  ) {
+    var res;
+    var hasNormalSlots = Object.keys(normalSlots).length > 0;
+    var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+    var key = slots && slots.$key;
+    if (!slots) {
+      res = {};
+    } else if (slots._normalized) {
+      // fast path 1: child component re-render only, parent did not change
+      return slots._normalized
+    } else if (
+      isStable &&
+      prevSlots &&
+      prevSlots !== emptyObject &&
+      key === prevSlots.$key &&
+      !hasNormalSlots &&
+      !prevSlots.$hasNormal
+    ) {
+      // fast path 2: stable scoped slots w/ no normal slots to proxy,
+      // only need to normalize once
+      return prevSlots
+    } else {
+      res = {};
+      for (var key$1 in slots) {
+        if (slots[key$1] && key$1[0] !== '$') {
+          res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+        }
+      }
+    }
+    // expose normal slots on scopedSlots
+    for (var key$2 in normalSlots) {
+      if (!(key$2 in res)) {
+        res[key$2] = proxyNormalSlot(normalSlots, key$2);
+      }
+    }
+    // avoriaz seems to mock a non-extensible $scopedSlots object
+    // and when that is passed down this would cause an error
+    if (slots && Object.isExtensible(slots)) {
+      (slots)._normalized = res;
+    }
+    def(res, '$stable', isStable);
+    def(res, '$key', key);
+    def(res, '$hasNormal', hasNormalSlots);
+    return res
+  }
+
+  function normalizeScopedSlot(normalSlots, key, fn) {
+    var normalized = function () {
+      var res = arguments.length ? fn.apply(null, arguments) : fn({});
+      res = res && typeof res === 'object' && !Array.isArray(res)
+        ? [res] // single vnode
+        : normalizeChildren(res);
+      var vnode = res && res[0];
+      return res && (
+        !vnode ||
+        (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+      ) ? undefined
+        : res
+    };
+    // this is a slot using the new v-slot syntax without scope. although it is
+    // compiled as a scoped slot, render fn users would expect it to be present
+    // on this.$slots because the usage is semantically a normal slot.
+    if (fn.proxy) {
+      Object.defineProperty(normalSlots, key, {
+        get: normalized,
+        enumerable: true,
+        configurable: true
+      });
+    }
+    return normalized
+  }
+
+  function proxyNormalSlot(slots, key) {
+    return function () { return slots[key]; }
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering v-for lists.
+   */
+  function renderList (
+    val,
+    render
+  ) {
+    var ret, i, l, keys, key;
+    if (Array.isArray(val) || typeof val === 'string') {
+      ret = new Array(val.length);
+      for (i = 0, l = val.length; i < l; i++) {
+        ret[i] = render(val[i], i);
+      }
+    } else if (typeof val === 'number') {
+      ret = new Array(val);
+      for (i = 0; i < val; i++) {
+        ret[i] = render(i + 1, i);
+      }
+    } else if (isObject(val)) {
+      if (hasSymbol && val[Symbol.iterator]) {
+        ret = [];
+        var iterator = val[Symbol.iterator]();
+        var result = iterator.next();
+        while (!result.done) {
+          ret.push(render(result.value, ret.length));
+          result = iterator.next();
+        }
+      } else {
+        keys = Object.keys(val);
+        ret = new Array(keys.length);
+        for (i = 0, l = keys.length; i < l; i++) {
+          key = keys[i];
+          ret[i] = render(val[key], key, i);
+        }
+      }
+    }
+    if (!isDef(ret)) {
+      ret = [];
+    }
+    (ret)._isVList = true;
+    return ret
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering <slot>
+   */
+  function renderSlot (
+    name,
+    fallbackRender,
+    props,
+    bindObject
+  ) {
+    var scopedSlotFn = this.$scopedSlots[name];
+    var nodes;
+    if (scopedSlotFn) {
+      // scoped slot
+      props = props || {};
+      if (bindObject) {
+        if (!isObject(bindObject)) {
+          warn('slot v-bind without argument expects an Object', this);
+        }
+        props = extend(extend({}, bindObject), props);
+      }
+      nodes =
+        scopedSlotFn(props) ||
+        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+    } else {
+      nodes =
+        this.$slots[name] ||
+        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+    }
+
+    var target = props && props.slot;
+    if (target) {
+      return this.$createElement('template', { slot: target }, nodes)
+    } else {
+      return nodes
+    }
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for resolving filters
+   */
+  function resolveFilter (id) {
+    return resolveAsset(this.$options, 'filters', id, true) || identity
+  }
+
+  /*  */
+
+  function isKeyNotMatch (expect, actual) {
+    if (Array.isArray(expect)) {
+      return expect.indexOf(actual) === -1
+    } else {
+      return expect !== actual
+    }
+  }
+
+  /**
+   * Runtime helper for checking keyCodes from config.
+   * exposed as Vue.prototype._k
+   * passing in eventKeyName as last argument separately for backwards compat
+   */
+  function checkKeyCodes (
+    eventKeyCode,
+    key,
+    builtInKeyCode,
+    eventKeyName,
+    builtInKeyName
+  ) {
+    var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+    if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+      return isKeyNotMatch(builtInKeyName, eventKeyName)
+    } else if (mappedKeyCode) {
+      return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+    } else if (eventKeyName) {
+      return hyphenate(eventKeyName) !== key
+    }
+    return eventKeyCode === undefined
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for merging v-bind="object" into a VNode's data.
+   */
+  function bindObjectProps (
+    data,
+    tag,
+    value,
+    asProp,
+    isSync
+  ) {
+    if (value) {
+      if (!isObject(value)) {
+        warn(
+          'v-bind without argument expects an Object or Array value',
+          this
+        );
+      } else {
+        if (Array.isArray(value)) {
+          value = toObject(value);
+        }
+        var hash;
+        var loop = function ( key ) {
+          if (
+            key === 'class' ||
+            key === 'style' ||
+            isReservedAttribute(key)
+          ) {
+            hash = data;
+          } else {
+            var type = data.attrs && data.attrs.type;
+            hash = asProp || config.mustUseProp(tag, type, key)
+              ? data.domProps || (data.domProps = {})
+              : data.attrs || (data.attrs = {});
+          }
+          var camelizedKey = camelize(key);
+          var hyphenatedKey = hyphenate(key);
+          if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+            hash[key] = value[key];
+
+            if (isSync) {
+              var on = data.on || (data.on = {});
+              on[("update:" + key)] = function ($event) {
+                value[key] = $event;
+              };
+            }
+          }
+        };
+
+        for (var key in value) loop( key );
+      }
+    }
+    return data
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering static trees.
+   */
+  function renderStatic (
+    index,
+    isInFor
+  ) {
+    var cached = this._staticTrees || (this._staticTrees = []);
+    var tree = cached[index];
+    // if has already-rendered static tree and not inside v-for,
+    // we can reuse the same tree.
+    if (tree && !isInFor) {
+      return tree
+    }
+    // otherwise, render a fresh tree.
+    tree = cached[index] = this.$options.staticRenderFns[index].call(
+      this._renderProxy,
+      null,
+      this // for render fns generated for functional component templates
+    );
+    markStatic(tree, ("__static__" + index), false);
+    return tree
+  }
+
+  /**
+   * Runtime helper for v-once.
+   * Effectively it means marking the node as static with a unique key.
+   */
+  function markOnce (
+    tree,
+    index,
+    key
+  ) {
+    markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+    return tree
+  }
+
+  function markStatic (
+    tree,
+    key,
+    isOnce
+  ) {
+    if (Array.isArray(tree)) {
+      for (var i = 0; i < tree.length; i++) {
+        if (tree[i] && typeof tree[i] !== 'string') {
+          markStaticNode(tree[i], (key + "_" + i), isOnce);
+        }
+      }
+    } else {
+      markStaticNode(tree, key, isOnce);
+    }
+  }
+
+  function markStaticNode (node, key, isOnce) {
+    node.isStatic = true;
+    node.key = key;
+    node.isOnce = isOnce;
+  }
+
+  /*  */
+
+  function bindObjectListeners (data, value) {
+    if (value) {
+      if (!isPlainObject(value)) {
+        warn(
+          'v-on without argument expects an Object value',
+          this
+        );
+      } else {
+        var on = data.on = data.on ? extend({}, data.on) : {};
+        for (var key in value) {
+          var existing = on[key];
+          var ours = value[key];
+          on[key] = existing ? [].concat(existing, ours) : ours;
+        }
+      }
+    }
+    return data
+  }
+
+  /*  */
+
+  function resolveScopedSlots (
+    fns, // see flow/vnode
+    res,
+    // the following are added in 2.6
+    hasDynamicKeys,
+    contentHashKey
+  ) {
+    res = res || { $stable: !hasDynamicKeys };
+    for (var i = 0; i < fns.length; i++) {
+      var slot = fns[i];
+      if (Array.isArray(slot)) {
+        resolveScopedSlots(slot, res, hasDynamicKeys);
+      } else if (slot) {
+        // marker for reverse proxying v-slot without scope on this.$slots
+        if (slot.proxy) {
+          slot.fn.proxy = true;
+        }
+        res[slot.key] = slot.fn;
+      }
+    }
+    if (contentHashKey) {
+      (res).$key = contentHashKey;
+    }
+    return res
+  }
+
+  /*  */
+
+  function bindDynamicKeys (baseObj, values) {
+    for (var i = 0; i < values.length; i += 2) {
+      var key = values[i];
+      if (typeof key === 'string' && key) {
+        baseObj[values[i]] = values[i + 1];
+      } else if (key !== '' && key !== null) {
+        // null is a special value for explicitly removing a binding
+        warn(
+          ("Invalid value for dynamic directive argument (expected string or null): " + key),
+          this
+        );
+      }
+    }
+    return baseObj
+  }
+
+  // helper to dynamically append modifier runtime markers to event names.
+  // ensure only append when value is already string, otherwise it will be cast
+  // to string and cause the type check to miss.
+  function prependModifier (value, symbol) {
+    return typeof value === 'string' ? symbol + value : value
+  }
+
+  /*  */
+
+  function installRenderHelpers (target) {
+    target._o = markOnce;
+    target._n = toNumber;
+    target._s = toString;
+    target._l = renderList;
+    target._t = renderSlot;
+    target._q = looseEqual;
+    target._i = looseIndexOf;
+    target._m = renderStatic;
+    target._f = resolveFilter;
+    target._k = checkKeyCodes;
+    target._b = bindObjectProps;
+    target._v = createTextVNode;
+    target._e = createEmptyVNode;
+    target._u = resolveScopedSlots;
+    target._g = bindObjectListeners;
+    target._d = bindDynamicKeys;
+    target._p = prependModifier;
+  }
+
+  /*  */
+
+  function FunctionalRenderContext (
+    data,
+    props,
+    children,
+    parent,
+    Ctor
+  ) {
+    var this$1 = this;
+
+    var options = Ctor.options;
+    // ensure the createElement function in functional components
+    // gets a unique context - this is necessary for correct named slot check
+    var contextVm;
+    if (hasOwn(parent, '_uid')) {
+      contextVm = Object.create(parent);
+      // $flow-disable-line
+      contextVm._original = parent;
+    } else {
+      // the context vm passed in is a functional context as well.
+      // in this case we want to make sure we are able to get a hold to the
+      // real context instance.
+      contextVm = parent;
+      // $flow-disable-line
+      parent = parent._original;
+    }
+    var isCompiled = isTrue(options._compiled);
+    var needNormalization = !isCompiled;
+
+    this.data = data;
+    this.props = props;
+    this.children = children;
+    this.parent = parent;
+    this.listeners = data.on || emptyObject;
+    this.injections = resolveInject(options.inject, parent);
+    this.slots = function () {
+      if (!this$1.$slots) {
+        normalizeScopedSlots(
+          data.scopedSlots,
+          this$1.$slots = resolveSlots(children, parent)
+        );
+      }
+      return this$1.$slots
+    };
+
+    Object.defineProperty(this, 'scopedSlots', ({
+      enumerable: true,
+      get: function get () {
+        return normalizeScopedSlots(data.scopedSlots, this.slots())
+      }
+    }));
+
+    // support for compiled functional template
+    if (isCompiled) {
+      // exposing $options for renderStatic()
+      this.$options = options;
+      // pre-resolve slots for renderSlot()
+      this.$slots = this.slots();
+      this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+    }
+
+    if (options._scopeId) {
+      this._c = function (a, b, c, d) {
+        var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+        if (vnode && !Array.isArray(vnode)) {
+          vnode.fnScopeId = options._scopeId;
+          vnode.fnContext = parent;
+        }
+        return vnode
       };
     } else {
-      'development' !== 'production' && warn('Invalid setter expression: ' + exp);
+      this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
     }
   }
 
-  /**
-   * Parse an expression into re-written getter/setters.
-   *
-   * @param {String} exp
-   * @param {Boolean} needSet
-   * @return {Function}
-   */
+  installRenderHelpers(FunctionalRenderContext.prototype);
 
-  function parseExpression(exp, needSet) {
-    exp = exp.trim();
-    // try cache
-    var hit = expressionCache.get(exp);
-    if (hit) {
-      if (needSet && !hit.set) {
-        hit.set = compileSetter(hit.exp);
+  function createFunctionalComponent (
+    Ctor,
+    propsData,
+    data,
+    contextVm,
+    children
+  ) {
+    var options = Ctor.options;
+    var props = {};
+    var propOptions = options.props;
+    if (isDef(propOptions)) {
+      for (var key in propOptions) {
+        props[key] = validateProp(key, propOptions, propsData || emptyObject);
       }
-      return hit;
+    } else {
+      if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+      if (isDef(data.props)) { mergeProps(props, data.props); }
     }
-    var res = { exp: exp };
-    res.get = isSimplePath(exp) && exp.indexOf('[') < 0
-    // optimized super simple getter
-    ? makeGetterFn('scope.' + exp)
-    // dynamic getter
-    : compileGetter(exp);
-    if (needSet) {
-      res.set = compileSetter(exp);
+
+    var renderContext = new FunctionalRenderContext(
+      data,
+      props,
+      children,
+      contextVm,
+      Ctor
+    );
+
+    var vnode = options.render.call(null, renderContext._c, renderContext);
+
+    if (vnode instanceof VNode) {
+      return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+    } else if (Array.isArray(vnode)) {
+      var vnodes = normalizeChildren(vnode) || [];
+      var res = new Array(vnodes.length);
+      for (var i = 0; i < vnodes.length; i++) {
+        res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+      }
+      return res
     }
-    expressionCache.put(exp, res);
-    return res;
   }
 
-  /**
-   * Check if an expression is a simple path.
-   *
-   * @param {String} exp
-   * @return {Boolean}
-   */
-
-  function isSimplePath(exp) {
-    return pathTestRE.test(exp) &&
-    // don't treat literal values as paths
-    !literalValueRE$1.test(exp) &&
-    // Math constants e.g. Math.PI, Math.E etc.
-    exp.slice(0, 5) !== 'Math.';
+  function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+    // #7817 clone node before setting fnContext, otherwise if the node is reused
+    // (e.g. it was from a cached normal slot) the fnContext causes named slots
+    // that should not be matched to match.
+    var clone = cloneVNode(vnode);
+    clone.fnContext = contextVm;
+    clone.fnOptions = options;
+    {
+      (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+    }
+    if (data.slot) {
+      (clone.data || (clone.data = {})).slot = data.slot;
+    }
+    return clone
   }
 
-var expression = Object.freeze({
-    parseExpression: parseExpression,
-    isSimplePath: isSimplePath
-  });
+  function mergeProps (to, from) {
+    for (var key in from) {
+      to[camelize(key)] = from[key];
+    }
+  }
 
-  // we have two separate queues: one for directive updates
-  // and one for user watcher registered via $watch().
-  // we want to guarantee directive updates to be called
-  // before user watchers so that when user watchers are
-  // triggered, the DOM would have already been in updated
-  // state.
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  // inline hooks to be invoked on component VNodes during patch
+  var componentVNodeHooks = {
+    init: function init (vnode, hydrating) {
+      if (
+        vnode.componentInstance &&
+        !vnode.componentInstance._isDestroyed &&
+        vnode.data.keepAlive
+      ) {
+        // kept-alive components, treat as a patch
+        var mountedNode = vnode; // work around flow
+        componentVNodeHooks.prepatch(mountedNode, mountedNode);
+      } else {
+        var child = vnode.componentInstance = createComponentInstanceForVnode(
+          vnode,
+          activeInstance
+        );
+        child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+      }
+    },
+
+    prepatch: function prepatch (oldVnode, vnode) {
+      var options = vnode.componentOptions;
+      var child = vnode.componentInstance = oldVnode.componentInstance;
+      updateChildComponent(
+        child,
+        options.propsData, // updated props
+        options.listeners, // updated listeners
+        vnode, // new parent vnode
+        options.children // new children
+      );
+    },
+
+    insert: function insert (vnode) {
+      var context = vnode.context;
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isMounted) {
+        componentInstance._isMounted = true;
+        callHook(componentInstance, 'mounted');
+      }
+      if (vnode.data.keepAlive) {
+        if (context._isMounted) {
+          // vue-router#1212
+          // During updates, a kept-alive component's child components may
+          // change, so directly walking the tree here may call activated hooks
+          // on incorrect children. Instead we push them into a queue which will
+          // be processed after the whole patch process ended.
+          queueActivatedComponent(componentInstance);
+        } else {
+          activateChildComponent(componentInstance, true /* direct */);
+        }
+      }
+    },
+
+    destroy: function destroy (vnode) {
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isDestroyed) {
+        if (!vnode.data.keepAlive) {
+          componentInstance.$destroy();
+        } else {
+          deactivateChildComponent(componentInstance, true /* direct */);
+        }
+      }
+    }
+  };
+
+  var hooksToMerge = Object.keys(componentVNodeHooks);
+
+  function createComponent (
+    Ctor,
+    data,
+    context,
+    children,
+    tag
+  ) {
+    if (isUndef(Ctor)) {
+      return
+    }
+
+    var baseCtor = context.$options._base;
+
+    // plain options object: turn it into a constructor
+    if (isObject(Ctor)) {
+      Ctor = baseCtor.extend(Ctor);
+    }
+
+    // if at this stage it's not a constructor or an async component factory,
+    // reject.
+    if (typeof Ctor !== 'function') {
+      {
+        warn(("Invalid Component definition: " + (String(Ctor))), context);
+      }
+      return
+    }
+
+    // async component
+    var asyncFactory;
+    if (isUndef(Ctor.cid)) {
+      asyncFactory = Ctor;
+      Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+      if (Ctor === undefined) {
+        // return a placeholder node for async component, which is rendered
+        // as a comment node but preserves all the raw information for the node.
+        // the information will be used for async server-rendering and hydration.
+        return createAsyncPlaceholder(
+          asyncFactory,
+          data,
+          context,
+          children,
+          tag
+        )
+      }
+    }
+
+    data = data || {};
+
+    // resolve constructor options in case global mixins are applied after
+    // component constructor creation
+    resolveConstructorOptions(Ctor);
+
+    // transform component v-model data into props & events
+    if (isDef(data.model)) {
+      transformModel(Ctor.options, data);
+    }
+
+    // extract props
+    var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+    // functional component
+    if (isTrue(Ctor.options.functional)) {
+      return createFunctionalComponent(Ctor, propsData, data, context, children)
+    }
+
+    // extract listeners, since these needs to be treated as
+    // child component listeners instead of DOM listeners
+    var listeners = data.on;
+    // replace with listeners with .native modifier
+    // so it gets processed during parent component patch.
+    data.on = data.nativeOn;
+
+    if (isTrue(Ctor.options.abstract)) {
+      // abstract components do not keep anything
+      // other than props & listeners & slot
+
+      // work around flow
+      var slot = data.slot;
+      data = {};
+      if (slot) {
+        data.slot = slot;
+      }
+    }
+
+    // install component management hooks onto the placeholder node
+    installComponentHooks(data);
+
+    // return a placeholder vnode
+    var name = Ctor.options.name || tag;
+    var vnode = new VNode(
+      ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+      data, undefined, undefined, undefined, context,
+      { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+      asyncFactory
+    );
+
+    return vnode
+  }
+
+  function createComponentInstanceForVnode (
+    // we know it's MountedComponentVNode but flow doesn't
+    vnode,
+    // activeInstance in lifecycle state
+    parent
+  ) {
+    var options = {
+      _isComponent: true,
+      _parentVnode: vnode,
+      parent: parent
+    };
+    // check inline-template render functions
+    var inlineTemplate = vnode.data.inlineTemplate;
+    if (isDef(inlineTemplate)) {
+      options.render = inlineTemplate.render;
+      options.staticRenderFns = inlineTemplate.staticRenderFns;
+    }
+    return new vnode.componentOptions.Ctor(options)
+  }
+
+  function installComponentHooks (data) {
+    var hooks = data.hook || (data.hook = {});
+    for (var i = 0; i < hooksToMerge.length; i++) {
+      var key = hooksToMerge[i];
+      var existing = hooks[key];
+      var toMerge = componentVNodeHooks[key];
+      if (existing !== toMerge && !(existing && existing._merged)) {
+        hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+      }
+    }
+  }
+
+  function mergeHook$1 (f1, f2) {
+    var merged = function (a, b) {
+      // flow complains about extra args which is why we use any
+      f1(a, b);
+      f2(a, b);
+    };
+    merged._merged = true;
+    return merged
+  }
+
+  // transform component v-model info (value and callback) into
+  // prop and event handler respectively.
+  function transformModel (options, data) {
+    var prop = (options.model && options.model.prop) || 'value';
+    var event = (options.model && options.model.event) || 'input'
+    ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+    var on = data.on || (data.on = {});
+    var existing = on[event];
+    var callback = data.model.callback;
+    if (isDef(existing)) {
+      if (
+        Array.isArray(existing)
+          ? existing.indexOf(callback) === -1
+          : existing !== callback
+      ) {
+        on[event] = [callback].concat(existing);
+      }
+    } else {
+      on[event] = callback;
+    }
+  }
+
+  /*  */
+
+  var SIMPLE_NORMALIZE = 1;
+  var ALWAYS_NORMALIZE = 2;
+
+  // wrapper function for providing a more flexible interface
+  // without getting yelled at by flow
+  function createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType,
+    alwaysNormalize
+  ) {
+    if (Array.isArray(data) || isPrimitive(data)) {
+      normalizationType = children;
+      children = data;
+      data = undefined;
+    }
+    if (isTrue(alwaysNormalize)) {
+      normalizationType = ALWAYS_NORMALIZE;
+    }
+    return _createElement(context, tag, data, children, normalizationType)
+  }
+
+  function _createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType
+  ) {
+    if (isDef(data) && isDef((data).__ob__)) {
+      warn(
+        "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+        'Always create fresh vnode data objects in each render!',
+        context
+      );
+      return createEmptyVNode()
+    }
+    // object syntax in v-bind
+    if (isDef(data) && isDef(data.is)) {
+      tag = data.is;
+    }
+    if (!tag) {
+      // in case of component :is set to falsy value
+      return createEmptyVNode()
+    }
+    // warn against non-primitive key
+    if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+    ) {
+      {
+        warn(
+          'Avoid using non-primitive value as key, ' +
+          'use string/number value instead.',
+          context
+        );
+      }
+    }
+    // support single function children as default scoped slot
+    if (Array.isArray(children) &&
+      typeof children[0] === 'function'
+    ) {
+      data = data || {};
+      data.scopedSlots = { default: children[0] };
+      children.length = 0;
+    }
+    if (normalizationType === ALWAYS_NORMALIZE) {
+      children = normalizeChildren(children);
+    } else if (normalizationType === SIMPLE_NORMALIZE) {
+      children = simpleNormalizeChildren(children);
+    }
+    var vnode, ns;
+    if (typeof tag === 'string') {
+      var Ctor;
+      ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+      if (config.isReservedTag(tag)) {
+        // platform built-in elements
+        if (isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
+          warn(
+            ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+            context
+          );
+        }
+        vnode = new VNode(
+          config.parsePlatformTagName(tag), data, children,
+          undefined, undefined, context
+        );
+      } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+        // component
+        vnode = createComponent(Ctor, data, context, children, tag);
+      } else {
+        // unknown or unlisted namespaced elements
+        // check at runtime because it may get assigned a namespace when its
+        // parent normalizes children
+        vnode = new VNode(
+          tag, data, children,
+          undefined, undefined, context
+        );
+      }
+    } else {
+      // direct component options / constructor
+      vnode = createComponent(tag, data, context, children);
+    }
+    if (Array.isArray(vnode)) {
+      return vnode
+    } else if (isDef(vnode)) {
+      if (isDef(ns)) { applyNS(vnode, ns); }
+      if (isDef(data)) { registerDeepBindings(data); }
+      return vnode
+    } else {
+      return createEmptyVNode()
+    }
+  }
+
+  function applyNS (vnode, ns, force) {
+    vnode.ns = ns;
+    if (vnode.tag === 'foreignObject') {
+      // use default namespace inside foreignObject
+      ns = undefined;
+      force = true;
+    }
+    if (isDef(vnode.children)) {
+      for (var i = 0, l = vnode.children.length; i < l; i++) {
+        var child = vnode.children[i];
+        if (isDef(child.tag) && (
+          isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+          applyNS(child, ns, force);
+        }
+      }
+    }
+  }
+
+  // ref #5318
+  // necessary to ensure parent re-render when deep bindings like :style and
+  // :class are used on slot nodes
+  function registerDeepBindings (data) {
+    if (isObject(data.style)) {
+      traverse(data.style);
+    }
+    if (isObject(data.class)) {
+      traverse(data.class);
+    }
+  }
+
+  /*  */
+
+  function initRender (vm) {
+    vm._vnode = null; // the root of the child tree
+    vm._staticTrees = null; // v-once cached trees
+    var options = vm.$options;
+    var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+    var renderContext = parentVnode && parentVnode.context;
+    vm.$slots = resolveSlots(options._renderChildren, renderContext);
+    vm.$scopedSlots = emptyObject;
+    // bind the createElement fn to this instance
+    // so that we get proper render context inside it.
+    // args order: tag, data, children, normalizationType, alwaysNormalize
+    // internal version is used by render functions compiled from templates
+    vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+    // normalization is always applied for the public version, used in
+    // user-written render functions.
+    vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+    // $attrs & $listeners are exposed for easier HOC creation.
+    // they need to be reactive so that HOCs using them are always updated
+    var parentData = parentVnode && parentVnode.data;
+
+    /* istanbul ignore else */
+    {
+      defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+        !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+      }, true);
+      defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+        !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+      }, true);
+    }
+  }
+
+  var currentRenderingInstance = null;
+
+  function renderMixin (Vue) {
+    // install runtime convenience helpers
+    installRenderHelpers(Vue.prototype);
+
+    Vue.prototype.$nextTick = function (fn) {
+      return nextTick(fn, this)
+    };
+
+    Vue.prototype._render = function () {
+      var vm = this;
+      var ref = vm.$options;
+      var render = ref.render;
+      var _parentVnode = ref._parentVnode;
+
+      if (_parentVnode) {
+        vm.$scopedSlots = normalizeScopedSlots(
+          _parentVnode.data.scopedSlots,
+          vm.$slots,
+          vm.$scopedSlots
+        );
+      }
+
+      // set parent vnode. this allows render functions to have access
+      // to the data on the placeholder node.
+      vm.$vnode = _parentVnode;
+      // render self
+      var vnode;
+      try {
+        // There's no need to maintain a stack because all render fns are called
+        // separately from one another. Nested component's render fns are called
+        // when parent component is patched.
+        currentRenderingInstance = vm;
+        vnode = render.call(vm._renderProxy, vm.$createElement);
+      } catch (e) {
+        handleError(e, vm, "render");
+        // return error render result,
+        // or previous vnode to prevent render error causing blank component
+        /* istanbul ignore else */
+        if (vm.$options.renderError) {
+          try {
+            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+          } catch (e) {
+            handleError(e, vm, "renderError");
+            vnode = vm._vnode;
+          }
+        } else {
+          vnode = vm._vnode;
+        }
+      } finally {
+        currentRenderingInstance = null;
+      }
+      // if the returned array contains only a single node, allow it
+      if (Array.isArray(vnode) && vnode.length === 1) {
+        vnode = vnode[0];
+      }
+      // return empty vnode in case the render function errored out
+      if (!(vnode instanceof VNode)) {
+        if (Array.isArray(vnode)) {
+          warn(
+            'Multiple root nodes returned from render function. Render function ' +
+            'should return a single root node.',
+            vm
+          );
+        }
+        vnode = createEmptyVNode();
+      }
+      // set parent
+      vnode.parent = _parentVnode;
+      return vnode
+    };
+  }
+
+  /*  */
+
+  function ensureCtor (comp, base) {
+    if (
+      comp.__esModule ||
+      (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+    ) {
+      comp = comp.default;
+    }
+    return isObject(comp)
+      ? base.extend(comp)
+      : comp
+  }
+
+  function createAsyncPlaceholder (
+    factory,
+    data,
+    context,
+    children,
+    tag
+  ) {
+    var node = createEmptyVNode();
+    node.asyncFactory = factory;
+    node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+    return node
+  }
+
+  function resolveAsyncComponent (
+    factory,
+    baseCtor
+  ) {
+    if (isTrue(factory.error) && isDef(factory.errorComp)) {
+      return factory.errorComp
+    }
+
+    if (isDef(factory.resolved)) {
+      return factory.resolved
+    }
+
+    var owner = currentRenderingInstance;
+    if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+      // already pending
+      factory.owners.push(owner);
+    }
+
+    if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+      return factory.loadingComp
+    }
+
+    if (owner && !isDef(factory.owners)) {
+      var owners = factory.owners = [owner];
+      var sync = true;
+      var timerLoading = null;
+      var timerTimeout = null
+
+      ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+      var forceRender = function (renderCompleted) {
+        for (var i = 0, l = owners.length; i < l; i++) {
+          (owners[i]).$forceUpdate();
+        }
+
+        if (renderCompleted) {
+          owners.length = 0;
+          if (timerLoading !== null) {
+            clearTimeout(timerLoading);
+            timerLoading = null;
+          }
+          if (timerTimeout !== null) {
+            clearTimeout(timerTimeout);
+            timerTimeout = null;
+          }
+        }
+      };
+
+      var resolve = once(function (res) {
+        // cache resolved
+        factory.resolved = ensureCtor(res, baseCtor);
+        // invoke callbacks only if this is not a synchronous resolve
+        // (async resolves are shimmed as synchronous during SSR)
+        if (!sync) {
+          forceRender(true);
+        } else {
+          owners.length = 0;
+        }
+      });
+
+      var reject = once(function (reason) {
+        warn(
+          "Failed to resolve async component: " + (String(factory)) +
+          (reason ? ("\nReason: " + reason) : '')
+        );
+        if (isDef(factory.errorComp)) {
+          factory.error = true;
+          forceRender(true);
+        }
+      });
+
+      var res = factory(resolve, reject);
+
+      if (isObject(res)) {
+        if (isPromise(res)) {
+          // () => Promise
+          if (isUndef(factory.resolved)) {
+            res.then(resolve, reject);
+          }
+        } else if (isPromise(res.component)) {
+          res.component.then(resolve, reject);
+
+          if (isDef(res.error)) {
+            factory.errorComp = ensureCtor(res.error, baseCtor);
+          }
+
+          if (isDef(res.loading)) {
+            factory.loadingComp = ensureCtor(res.loading, baseCtor);
+            if (res.delay === 0) {
+              factory.loading = true;
+            } else {
+              timerLoading = setTimeout(function () {
+                timerLoading = null;
+                if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                  factory.loading = true;
+                  forceRender(false);
+                }
+              }, res.delay || 200);
+            }
+          }
+
+          if (isDef(res.timeout)) {
+            timerTimeout = setTimeout(function () {
+              timerTimeout = null;
+              if (isUndef(factory.resolved)) {
+                reject(
+                  "timeout (" + (res.timeout) + "ms)"
+                );
+              }
+            }, res.timeout);
+          }
+        }
+      }
+
+      sync = false;
+      // return in case resolved synchronously
+      return factory.loading
+        ? factory.loadingComp
+        : factory.resolved
+    }
+  }
+
+  /*  */
+
+  function getFirstComponentChild (children) {
+    if (Array.isArray(children)) {
+      for (var i = 0; i < children.length; i++) {
+        var c = children[i];
+        if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+          return c
+        }
+      }
+    }
+  }
+
+  /*  */
+
+  /*  */
+
+  function initEvents (vm) {
+    vm._events = Object.create(null);
+    vm._hasHookEvent = false;
+    // init parent attached events
+    var listeners = vm.$options._parentListeners;
+    if (listeners) {
+      updateComponentListeners(vm, listeners);
+    }
+  }
+
+  var target;
+
+  function add (event, fn) {
+    target.$on(event, fn);
+  }
+
+  function remove$1 (event, fn) {
+    target.$off(event, fn);
+  }
+
+  function createOnceHandler (event, fn) {
+    var _target = target;
+    return function onceHandler () {
+      var res = fn.apply(null, arguments);
+      if (res !== null) {
+        _target.$off(event, onceHandler);
+      }
+    }
+  }
+
+  function updateComponentListeners (
+    vm,
+    listeners,
+    oldListeners
+  ) {
+    target = vm;
+    updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+    target = undefined;
+  }
+
+  function eventsMixin (Vue) {
+    var hookRE = /^hook:/;
+    Vue.prototype.$on = function (event, fn) {
+      var vm = this;
+      if (Array.isArray(event)) {
+        for (var i = 0, l = event.length; i < l; i++) {
+          vm.$on(event[i], fn);
+        }
+      } else {
+        (vm._events[event] || (vm._events[event] = [])).push(fn);
+        // optimize hook:event cost by using a boolean flag marked at registration
+        // instead of a hash lookup
+        if (hookRE.test(event)) {
+          vm._hasHookEvent = true;
+        }
+      }
+      return vm
+    };
+
+    Vue.prototype.$once = function (event, fn) {
+      var vm = this;
+      function on () {
+        vm.$off(event, on);
+        fn.apply(vm, arguments);
+      }
+      on.fn = fn;
+      vm.$on(event, on);
+      return vm
+    };
+
+    Vue.prototype.$off = function (event, fn) {
+      var vm = this;
+      // all
+      if (!arguments.length) {
+        vm._events = Object.create(null);
+        return vm
+      }
+      // array of events
+      if (Array.isArray(event)) {
+        for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+          vm.$off(event[i$1], fn);
+        }
+        return vm
+      }
+      // specific event
+      var cbs = vm._events[event];
+      if (!cbs) {
+        return vm
+      }
+      if (!fn) {
+        vm._events[event] = null;
+        return vm
+      }
+      // specific handler
+      var cb;
+      var i = cbs.length;
+      while (i--) {
+        cb = cbs[i];
+        if (cb === fn || cb.fn === fn) {
+          cbs.splice(i, 1);
+          break
+        }
+      }
+      return vm
+    };
+
+    Vue.prototype.$emit = function (event) {
+      var vm = this;
+      {
+        var lowerCaseEvent = event.toLowerCase();
+        if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+          tip(
+            "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+            (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+            "Note that HTML attributes are case-insensitive and you cannot use " +
+            "v-on to listen to camelCase events when using in-DOM templates. " +
+            "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+          );
+        }
+      }
+      var cbs = vm._events[event];
+      if (cbs) {
+        cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+        var args = toArray(arguments, 1);
+        var info = "event handler for \"" + event + "\"";
+        for (var i = 0, l = cbs.length; i < l; i++) {
+          invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+        }
+      }
+      return vm
+    };
+  }
+
+  /*  */
+
+  var activeInstance = null;
+  var isUpdatingChildComponent = false;
+
+  function setActiveInstance(vm) {
+    var prevActiveInstance = activeInstance;
+    activeInstance = vm;
+    return function () {
+      activeInstance = prevActiveInstance;
+    }
+  }
+
+  function initLifecycle (vm) {
+    var options = vm.$options;
+
+    // locate first non-abstract parent
+    var parent = options.parent;
+    if (parent && !options.abstract) {
+      while (parent.$options.abstract && parent.$parent) {
+        parent = parent.$parent;
+      }
+      parent.$children.push(vm);
+    }
+
+    vm.$parent = parent;
+    vm.$root = parent ? parent.$root : vm;
+
+    vm.$children = [];
+    vm.$refs = {};
+
+    vm._watcher = null;
+    vm._inactive = null;
+    vm._directInactive = false;
+    vm._isMounted = false;
+    vm._isDestroyed = false;
+    vm._isBeingDestroyed = false;
+  }
+
+  function lifecycleMixin (Vue) {
+    Vue.prototype._update = function (vnode, hydrating) {
+      var vm = this;
+      var prevEl = vm.$el;
+      var prevVnode = vm._vnode;
+      var restoreActiveInstance = setActiveInstance(vm);
+      vm._vnode = vnode;
+      // Vue.prototype.__patch__ is injected in entry points
+      // based on the rendering backend used.
+      if (!prevVnode) {
+        // initial render
+        vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+      } else {
+        // updates
+        vm.$el = vm.__patch__(prevVnode, vnode);
+      }
+      restoreActiveInstance();
+      // update __vue__ reference
+      if (prevEl) {
+        prevEl.__vue__ = null;
+      }
+      if (vm.$el) {
+        vm.$el.__vue__ = vm;
+      }
+      // if parent is an HOC, update its $el as well
+      if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+        vm.$parent.$el = vm.$el;
+      }
+      // updated hook is called by the scheduler to ensure that children are
+      // updated in a parent's updated hook.
+    };
+
+    Vue.prototype.$forceUpdate = function () {
+      var vm = this;
+      if (vm._watcher) {
+        vm._watcher.update();
+      }
+    };
+
+    Vue.prototype.$destroy = function () {
+      var vm = this;
+      if (vm._isBeingDestroyed) {
+        return
+      }
+      callHook(vm, 'beforeDestroy');
+      vm._isBeingDestroyed = true;
+      // remove self from parent
+      var parent = vm.$parent;
+      if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+        remove(parent.$children, vm);
+      }
+      // teardown watchers
+      if (vm._watcher) {
+        vm._watcher.teardown();
+      }
+      var i = vm._watchers.length;
+      while (i--) {
+        vm._watchers[i].teardown();
+      }
+      // remove reference from data ob
+      // frozen object may not have observer.
+      if (vm._data.__ob__) {
+        vm._data.__ob__.vmCount--;
+      }
+      // call the last hook...
+      vm._isDestroyed = true;
+      // invoke destroy hooks on current rendered tree
+      vm.__patch__(vm._vnode, null);
+      // fire destroyed hook
+      callHook(vm, 'destroyed');
+      // turn off all instance listeners.
+      vm.$off();
+      // remove __vue__ reference
+      if (vm.$el) {
+        vm.$el.__vue__ = null;
+      }
+      // release circular reference (#6759)
+      if (vm.$vnode) {
+        vm.$vnode.parent = null;
+      }
+    };
+  }
+
+  function mountComponent (
+    vm,
+    el,
+    hydrating
+  ) {
+    vm.$el = el;
+    if (!vm.$options.render) {
+      vm.$options.render = createEmptyVNode;
+      {
+        /* istanbul ignore if */
+        if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+          vm.$options.el || el) {
+          warn(
+            'You are using the runtime-only build of Vue where the template ' +
+            'compiler is not available. Either pre-compile the templates into ' +
+            'render functions, or use the compiler-included build.',
+            vm
+          );
+        } else {
+          warn(
+            'Failed to mount component: template or render function not defined.',
+            vm
+          );
+        }
+      }
+    }
+    callHook(vm, 'beforeMount');
+
+    var updateComponent;
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      updateComponent = function () {
+        var name = vm._name;
+        var id = vm._uid;
+        var startTag = "vue-perf-start:" + id;
+        var endTag = "vue-perf-end:" + id;
+
+        mark(startTag);
+        var vnode = vm._render();
+        mark(endTag);
+        measure(("vue " + name + " render"), startTag, endTag);
+
+        mark(startTag);
+        vm._update(vnode, hydrating);
+        mark(endTag);
+        measure(("vue " + name + " patch"), startTag, endTag);
+      };
+    } else {
+      updateComponent = function () {
+        vm._update(vm._render(), hydrating);
+      };
+    }
+
+    // we set this to vm._watcher inside the watcher's constructor
+    // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+    // component's mounted hook), which relies on vm._watcher being already defined
+    new Watcher(vm, updateComponent, noop, {
+      before: function before () {
+        if (vm._isMounted && !vm._isDestroyed) {
+          callHook(vm, 'beforeUpdate');
+        }
+      }
+    }, true /* isRenderWatcher */);
+    hydrating = false;
+
+    // manually mounted instance, call mounted on self
+    // mounted is called for render-created child components in its inserted hook
+    if (vm.$vnode == null) {
+      vm._isMounted = true;
+      callHook(vm, 'mounted');
+    }
+    return vm
+  }
+
+  function updateChildComponent (
+    vm,
+    propsData,
+    listeners,
+    parentVnode,
+    renderChildren
+  ) {
+    {
+      isUpdatingChildComponent = true;
+    }
+
+    // determine whether component has slot children
+    // we need to do this before overwriting $options._renderChildren.
+
+    // check if there are dynamic scopedSlots (hand-written or compiled but with
+    // dynamic slot names). Static scoped slots compiled from template has the
+    // "$stable" marker.
+    var newScopedSlots = parentVnode.data.scopedSlots;
+    var oldScopedSlots = vm.$scopedSlots;
+    var hasDynamicScopedSlot = !!(
+      (newScopedSlots && !newScopedSlots.$stable) ||
+      (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+      (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+      (!newScopedSlots && vm.$scopedSlots.$key)
+    );
+
+    // Any static slot children from the parent may have changed during parent's
+    // update. Dynamic scoped slots may also have changed. In such cases, a forced
+    // update is necessary to ensure correctness.
+    var needsForceUpdate = !!(
+      renderChildren ||               // has new static slots
+      vm.$options._renderChildren ||  // has old static slots
+      hasDynamicScopedSlot
+    );
+
+    vm.$options._parentVnode = parentVnode;
+    vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+    if (vm._vnode) { // update child tree's parent
+      vm._vnode.parent = parentVnode;
+    }
+    vm.$options._renderChildren = renderChildren;
+
+    // update $attrs and $listeners hash
+    // these are also reactive so they may trigger child update if the child
+    // used them during render
+    vm.$attrs = parentVnode.data.attrs || emptyObject;
+    vm.$listeners = listeners || emptyObject;
+
+    // update props
+    if (propsData && vm.$options.props) {
+      toggleObserving(false);
+      var props = vm._props;
+      var propKeys = vm.$options._propKeys || [];
+      for (var i = 0; i < propKeys.length; i++) {
+        var key = propKeys[i];
+        var propOptions = vm.$options.props; // wtf flow?
+        props[key] = validateProp(key, propOptions, propsData, vm);
+      }
+      toggleObserving(true);
+      // keep a copy of raw propsData
+      vm.$options.propsData = propsData;
+    }
+
+    // update listeners
+    listeners = listeners || emptyObject;
+    var oldListeners = vm.$options._parentListeners;
+    vm.$options._parentListeners = listeners;
+    updateComponentListeners(vm, listeners, oldListeners);
+
+    // resolve slots + force update if has children
+    if (needsForceUpdate) {
+      vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+      vm.$forceUpdate();
+    }
+
+    {
+      isUpdatingChildComponent = false;
+    }
+  }
+
+  function isInInactiveTree (vm) {
+    while (vm && (vm = vm.$parent)) {
+      if (vm._inactive) { return true }
+    }
+    return false
+  }
+
+  function activateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = false;
+      if (isInInactiveTree(vm)) {
+        return
+      }
+    } else if (vm._directInactive) {
+      return
+    }
+    if (vm._inactive || vm._inactive === null) {
+      vm._inactive = false;
+      for (var i = 0; i < vm.$children.length; i++) {
+        activateChildComponent(vm.$children[i]);
+      }
+      callHook(vm, 'activated');
+    }
+  }
+
+  function deactivateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = true;
+      if (isInInactiveTree(vm)) {
+        return
+      }
+    }
+    if (!vm._inactive) {
+      vm._inactive = true;
+      for (var i = 0; i < vm.$children.length; i++) {
+        deactivateChildComponent(vm.$children[i]);
+      }
+      callHook(vm, 'deactivated');
+    }
+  }
+
+  function callHook (vm, hook) {
+    // #7573 disable dep collection when invoking lifecycle hooks
+    pushTarget();
+    var handlers = vm.$options[hook];
+    var info = hook + " hook";
+    if (handlers) {
+      for (var i = 0, j = handlers.length; i < j; i++) {
+        invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+      }
+    }
+    if (vm._hasHookEvent) {
+      vm.$emit('hook:' + hook);
+    }
+    popTarget();
+  }
+
+  /*  */
+
+  var MAX_UPDATE_COUNT = 100;
 
   var queue = [];
-  var userQueue = [];
+  var activatedChildren = [];
   var has = {};
   var circular = {};
   var waiting = false;
+  var flushing = false;
+  var index = 0;
 
   /**
-   * Reset the batcher's state.
+   * Reset the scheduler's state.
    */
-
-  function resetBatcherState() {
-    queue.length = 0;
-    userQueue.length = 0;
+  function resetSchedulerState () {
+    index = queue.length = activatedChildren.length = 0;
     has = {};
-    circular = {};
-    waiting = false;
+    {
+      circular = {};
+    }
+    waiting = flushing = false;
+  }
+
+  // Async edge case #6566 requires saving the timestamp when event listeners are
+  // attached. However, calling performance.now() has a perf overhead especially
+  // if the page has thousands of event listeners. Instead, we take a timestamp
+  // every time the scheduler flushes and use that for all event listeners
+  // attached during that flush.
+  var currentFlushTimestamp = 0;
+
+  // Async edge case fix requires storing an event listener's attach timestamp.
+  var getNow = Date.now;
+
+  // Determine what event timestamp the browser is using. Annoyingly, the
+  // timestamp can either be hi-res (relative to page load) or low-res
+  // (relative to UNIX epoch), so in order to compare time we have to use the
+  // same timestamp type when saving the flush timestamp.
+  // All IE versions use low-res event timestamps, and have problematic clock
+  // implementations (#9632)
+  if (inBrowser && !isIE) {
+    var performance = window.performance;
+    if (
+      performance &&
+      typeof performance.now === 'function' &&
+      getNow() > document.createEvent('Event').timeStamp
+    ) {
+      // if the event timestamp, although evaluated AFTER the Date.now(), is
+      // smaller than it, it means the event is using a hi-res timestamp,
+      // and we need to use the hi-res version for event listener timestamps as
+      // well.
+      getNow = function () { return performance.now(); };
+    }
   }
 
   /**
    * Flush both queues and run the watchers.
    */
+  function flushSchedulerQueue () {
+    currentFlushTimestamp = getNow();
+    flushing = true;
+    var watcher, id;
 
-  function flushBatcherQueue() {
-    var _again = true;
+    // Sort queue before flush.
+    // This ensures that:
+    // 1. Components are updated from parent to child. (because parent is always
+    //    created before the child)
+    // 2. A component's user watchers are run before its render watcher (because
+    //    user watchers are created before the render watcher)
+    // 3. If a component is destroyed during a parent component's watcher run,
+    //    its watchers can be skipped.
+    queue.sort(function (a, b) { return a.id - b.id; });
 
-    _function: while (_again) {
-      _again = false;
-
-      runBatcherQueue(queue);
-      runBatcherQueue(userQueue);
-      // user watchers triggered more watchers,
-      // keep flushing until it depletes
-      if (queue.length) {
-        _again = true;
-        continue _function;
+    // do not cache length because more watchers might be pushed
+    // as we run existing watchers
+    for (index = 0; index < queue.length; index++) {
+      watcher = queue[index];
+      if (watcher.before) {
+        watcher.before();
       }
-      // dev tool hook
-      /* istanbul ignore if */
-      if (devtools && config.devtools) {
-        devtools.emit('flush');
+      id = watcher.id;
+      has[id] = null;
+      watcher.run();
+      // in dev build, check and stop circular updates.
+      if (has[id] != null) {
+        circular[id] = (circular[id] || 0) + 1;
+        if (circular[id] > MAX_UPDATE_COUNT) {
+          warn(
+            'You may have an infinite update loop ' + (
+              watcher.user
+                ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+                : "in a component render function."
+            ),
+            watcher.vm
+          );
+          break
+        }
+      }
+    }
+
+    // keep copies of post queues before resetting state
+    var activatedQueue = activatedChildren.slice();
+    var updatedQueue = queue.slice();
+
+    resetSchedulerState();
+
+    // call component updated and activated hooks
+    callActivatedHooks(activatedQueue);
+    callUpdatedHooks(updatedQueue);
+
+    // devtool hook
+    /* istanbul ignore if */
+    if (devtools && config.devtools) {
+      devtools.emit('flush');
+    }
+  }
+
+  function callUpdatedHooks (queue) {
+    var i = queue.length;
+    while (i--) {
+      var watcher = queue[i];
+      var vm = watcher.vm;
+      if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'updated');
       }
-      resetBatcherState();
     }
   }
 
   /**
-   * Run the watchers in a single queue.
-   *
-   * @param {Array} queue
+   * Queue a kept-alive component that was activated during patch.
+   * The queue will be processed after the entire tree has been patched.
    */
+  function queueActivatedComponent (vm) {
+    // setting _inactive to false here so that a render function can
+    // rely on checking whether it's in an inactive tree (e.g. router-view)
+    vm._inactive = false;
+    activatedChildren.push(vm);
+  }
 
-  function runBatcherQueue(queue) {
-    // do not cache length because more watchers might be pushed
-    // as we run existing watchers
+  function callActivatedHooks (queue) {
     for (var i = 0; i < queue.length; i++) {
-      var watcher = queue[i];
-      var id = watcher.id;
-      has[id] = null;
-      watcher.run();
-      // in dev build, check and stop circular updates.
-      if ('development' !== 'production' && has[id] != null) {
-        circular[id] = (circular[id] || 0) + 1;
-        if (circular[id] > config._maxUpdateCount) {
-          warn('You may have an infinite update loop for watcher ' + 'with expression "' + watcher.expression + '"', watcher.vm);
-          break;
-        }
-      }
+      queue[i]._inactive = true;
+      activateChildComponent(queue[i], true /* true */);
     }
-    queue.length = 0;
   }
 
   /**
    * Push a watcher into the watcher queue.
    * Jobs with duplicate IDs will be skipped unless it's
    * pushed when the queue is being flushed.
-   *
-   * @param {Watcher} watcher
-   *   properties:
-   *   - {Number} id
-   *   - {Function} run
    */
-
-  function pushWatcher(watcher) {
+  function queueWatcher (watcher) {
     var id = watcher.id;
     if (has[id] == null) {
-      // push watcher into appropriate queue
-      var q = watcher.user ? userQueue : queue;
-      has[id] = q.length;
-      q.push(watcher);
+      has[id] = true;
+      if (!flushing) {
+        queue.push(watcher);
+      } else {
+        // if already flushing, splice the watcher based on its id
+        // if already past its id, it will be run next immediately.
+        var i = queue.length - 1;
+        while (i > index && queue[i].id > watcher.id) {
+          i--;
+        }
+        queue.splice(i + 1, 0, watcher);
+      }
       // queue the flush
       if (!waiting) {
         waiting = true;
-        nextTick(flushBatcherQueue);
+
+        if (!config.async) {
+          flushSchedulerQueue();
+          return
+        }
+        nextTick(flushSchedulerQueue);
       }
     }
   }
 
+  /*  */
+
+
+
   var uid$2 = 0;
 
   /**
    * A watcher parses an expression, collects dependencies,
    * and fires callback when the expression value changes.
    * This is used for both the $watch() api and directives.
-   *
-   * @param {Vue} vm
-   * @param {String|Function} expOrFn
-   * @param {Function} cb
-   * @param {Object} options
-   *                 - {Array} filters
-   *                 - {Boolean} twoWay
-   *                 - {Boolean} deep
-   *                 - {Boolean} user
-   *                 - {Boolean} sync
-   *                 - {Boolean} lazy
-   *                 - {Function} [preProcess]
-   *                 - {Function} [postProcess]
-   * @constructor
    */
-  function Watcher(vm, expOrFn, cb, options) {
-    // mix in options
-    if (options) {
-      extend(this, options);
-    }
-    var isFn = typeof expOrFn === 'function';
+  var Watcher = function Watcher (
+    vm,
+    expOrFn,
+    cb,
+    options,
+    isRenderWatcher
+  ) {
     this.vm = vm;
+    if (isRenderWatcher) {
+      vm._watcher = this;
+    }
     vm._watchers.push(this);
-    this.expression = expOrFn;
+    // options
+    if (options) {
+      this.deep = !!options.deep;
+      this.user = !!options.user;
+      this.lazy = !!options.lazy;
+      this.sync = !!options.sync;
+      this.before = options.before;
+    } else {
+      this.deep = this.user = this.lazy = this.sync = false;
+    }
     this.cb = cb;
     this.id = ++uid$2; // uid for batching
     this.active = true;
@@ -3149,106 +4462,58 @@ var expression = Object.freeze({
     this.newDeps = [];
     this.depIds = new _Set();
     this.newDepIds = new _Set();
-    this.prevError = null; // for async error stacks
-    // parse expression for getter/setter
-    if (isFn) {
+    this.expression = expOrFn.toString();
+    // parse expression for getter
+    if (typeof expOrFn === 'function') {
       this.getter = expOrFn;
-      this.setter = undefined;
     } else {
-      var res = parseExpression(expOrFn, this.twoWay);
-      this.getter = res.get;
-      this.setter = res.set;
+      this.getter = parsePath(expOrFn);
+      if (!this.getter) {
+        this.getter = noop;
+        warn(
+          "Failed watching path: \"" + expOrFn + "\" " +
+          'Watcher only accepts simple dot-delimited paths. ' +
+          'For full control, use a function instead.',
+          vm
+        );
+      }
     }
-    this.value = this.lazy ? undefined : this.get();
-    // state for avoiding false triggers for deep and Array
-    // watchers during vm._digest()
-    this.queued = this.shallow = false;
-  }
+    this.value = this.lazy
+      ? undefined
+      : this.get();
+  };
 
   /**
    * Evaluate the getter, and re-collect dependencies.
    */
-
-  Watcher.prototype.get = function () {
-    this.beforeGet();
-    var scope = this.scope || this.vm;
+  Watcher.prototype.get = function get () {
+    pushTarget(this);
     var value;
+    var vm = this.vm;
     try {
-      value = this.getter.call(scope, scope);
+      value = this.getter.call(vm, vm);
     } catch (e) {
-      if ('development' !== 'production' && config.warnExpressionErrors) {
-        warn('Error when evaluating expression ' + '"' + this.expression + '": ' + e.toString(), this.vm);
+      if (this.user) {
+        handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+      } else {
+        throw e
       }
-    }
-    // "touch" every property so they are all tracked as
-    // dependencies for deep watching
-    if (this.deep) {
-      traverse(value);
-    }
-    if (this.preProcess) {
-      value = this.preProcess(value);
-    }
-    if (this.filters) {
-      value = scope._applyFilters(value, null, this.filters, false);
-    }
-    if (this.postProcess) {
-      value = this.postProcess(value);
-    }
-    this.afterGet();
-    return value;
-  };
-
-  /**
-   * Set the corresponding value with the setter.
-   *
-   * @param {*} value
-   */
-
-  Watcher.prototype.set = function (value) {
-    var scope = this.scope || this.vm;
-    if (this.filters) {
-      value = scope._applyFilters(value, this.value, this.filters, true);
-    }
-    try {
-      this.setter.call(scope, scope, value);
-    } catch (e) {
-      if ('development' !== 'production' && config.warnExpressionErrors) {
-        warn('Error when evaluating setter ' + '"' + this.expression + '": ' + e.toString(), this.vm);
+    } finally {
+      // "touch" every property so they are all tracked as
+      // dependencies for deep watching
+      if (this.deep) {
+        traverse(value);
       }
+      popTarget();
+      this.cleanupDeps();
     }
-    // two-way sync for v-for alias
-    var forContext = scope.$forContext;
-    if (forContext && forContext.alias === this.expression) {
-      if (forContext.filters) {
-        'development' !== 'production' && warn('It seems you are using two-way binding on ' + 'a v-for alias (' + this.expression + '), and the ' + 'v-for has filters. This will not work properly. ' + 'Either remove the filters or use an array of ' + 'objects and bind to object properties instead.', this.vm);
-        return;
-      }
-      forContext._withLock(function () {
-        if (scope.$key) {
-          // original is an object
-          forContext.rawValue[scope.$key] = value;
-        } else {
-          forContext.rawValue.$set(scope.$index, value);
-        }
-      });
-    }
-  };
-
-  /**
-   * Prepare for dependency collection.
-   */
-
-  Watcher.prototype.beforeGet = function () {
-    Dep.target = this;
+    return value
   };
 
   /**
    * Add a dependency to this directive.
-   *
-   * @param {Dep} dep
    */
-
-  Watcher.prototype.addDep = function (dep) {
+  Watcher.prototype.addDep = function addDep (dep) {
     var id = dep.id;
     if (!this.newDepIds.has(id)) {
       this.newDepIds.add(id);
@@ -3262,9 +4527,7 @@ var expression = Object.freeze({
   /**
    * Clean up for dependency collection.
    */
-
-  Watcher.prototype.afterGet = function () {
-    Dep.target = null;
+  Watcher.prototype.cleanupDeps = function cleanupDeps () {
     var i = this.deps.length;
     while (i--) {
       var dep = this.deps[i];
@@ -3285,66 +4548,43 @@ var expression = Object.freeze({
   /**
    * Subscriber interface.
    * Will be called when a dependency changes.
-   *
-   * @param {Boolean} shallow
    */
-
-  Watcher.prototype.update = function (shallow) {
+  Watcher.prototype.update = function update () {
+    /* istanbul ignore else */
     if (this.lazy) {
       this.dirty = true;
-    } else if (this.sync || !config.async) {
+    } else if (this.sync) {
       this.run();
     } else {
-      // if queued, only overwrite shallow with non-shallow,
-      // but not the other way around.
-      this.shallow = this.queued ? shallow ? this.shallow : false : !!shallow;
-      this.queued = true;
-      // record before-push error stack in debug mode
-      /* istanbul ignore if */
-      if ('development' !== 'production' && config.debug) {
-        this.prevError = new Error('[vue] async stack trace');
-      }
-      pushWatcher(this);
+      queueWatcher(this);
     }
   };
 
   /**
-   * Batcher job interface.
-   * Will be called by the batcher.
+   * Scheduler job interface.
+   * Will be called by the scheduler.
    */
-
-  Watcher.prototype.run = function () {
+  Watcher.prototype.run = function run () {
     if (this.active) {
       var value = this.get();
-      if (value !== this.value ||
-      // Deep watchers and watchers on Object/Arrays should fire even
-      // when the value is the same, because the value may
-      // have mutated; but only do so if this is a
-      // non-shallow update (caused by a vm digest).
-      (isObject(value) || this.deep) && !this.shallow) {
+      if (
+        value !== this.value ||
+        // Deep watchers and watchers on Object/Arrays should fire even
+        // when the value is the same, because the value may
+        // have mutated.
+        isObject(value) ||
+        this.deep
+      ) {
         // set new value
         var oldValue = this.value;
         this.value = value;
-        // in debug + async mode, when a watcher callbacks
-        // throws, we also throw the saved before-push error
-        // so the full cross-tick stack trace is available.
-        var prevError = this.prevError;
-        /* istanbul ignore if */
-        if ('development' !== 'production' && config.debug && prevError) {
-          this.prevError = null;
-          try {
-            this.cb.call(this.vm, value, oldValue);
-          } catch (e) {
-            nextTick(function () {
-              throw prevError;
-            }, 0);
-            throw e;
-          }
+        if (this.user) {
+          var info = "callback for watcher \"" + (this.expression) + "\"";
+          invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
         } else {
           this.cb.call(this.vm, value, oldValue);
         }
       }
-      this.queued = this.shallow = false;
     }
   };
 
@@ -3352,21 +4592,15 @@ var expression = Object.freeze({
    * Evaluate the value of the watcher.
    * This only gets called for lazy watchers.
    */
-
-  Watcher.prototype.evaluate = function () {
-    // avoid overwriting another watcher that is being
-    // collected.
-    var current = Dep.target;
+  Watcher.prototype.evaluate = function evaluate () {
     this.value = this.get();
     this.dirty = false;
-    Dep.target = current;
   };
 
   /**
    * Depend on all deps collected by this watcher.
    */
-
-  Watcher.prototype.depend = function () {
+  Watcher.prototype.depend = function depend () {
     var i = this.deps.length;
     while (i--) {
       this.deps[i].depend();
@@ -3374,6700 +4608,7407 @@ var expression = Object.freeze({
   };
 
   /**
-   * Remove self from all dependencies' subcriber list.
+   * Remove self from all dependencies' subscriber list.
    */
-
-  Watcher.prototype.teardown = function () {
+  Watcher.prototype.teardown = function teardown () {
     if (this.active) {
       // remove self from vm's watcher list
       // this is a somewhat expensive operation so we skip it
-      // if the vm is being destroyed or is performing a v-for
-      // re-render (the watcher list is then filtered by v-for).
-      if (!this.vm._isBeingDestroyed && !this.vm._vForRemoving) {
-        this.vm._watchers.$remove(this);
+      // if the vm is being destroyed.
+      if (!this.vm._isBeingDestroyed) {
+        remove(this.vm._watchers, this);
       }
       var i = this.deps.length;
       while (i--) {
         this.deps[i].removeSub(this);
       }
       this.active = false;
-      this.vm = this.cb = this.value = null;
     }
   };
 
-  /**
-   * Recrusively traverse an object to evoke all converted
-   * getters, so that every nested property inside the object
-   * is collected as a "deep" dependency.
-   *
-   * @param {*} val
-   */
+  /*  */
 
-  var seenObjects = new _Set();
-  function traverse(val, seen) {
-    var i = undefined,
-        keys = undefined;
-    if (!seen) {
-      seen = seenObjects;
-      seen.clear();
-    }
-    var isA = isArray(val);
-    var isO = isObject(val);
-    if ((isA || isO) && Object.isExtensible(val)) {
-      if (val.__ob__) {
-        var depId = val.__ob__.dep.id;
-        if (seen.has(depId)) {
-          return;
-        } else {
-          seen.add(depId);
-        }
-      }
-      if (isA) {
-        i = val.length;
-        while (i--) traverse(val[i], seen);
-      } else if (isO) {
-        keys = Object.keys(val);
-        i = keys.length;
-        while (i--) traverse(val[keys[i]], seen);
-      }
-    }
-  }
-
-  var text$1 = {
-
-    bind: function bind() {
-      this.attr = this.el.nodeType === 3 ? 'data' : 'textContent';
-    },
-
-    update: function update(value) {
-      this.el[this.attr] = _toString(value);
-    }
+  var sharedPropertyDefinition = {
+    enumerable: true,
+    configurable: true,
+    get: noop,
+    set: noop
   };
 
-  var templateCache = new Cache(1000);
-  var idSelectorCache = new Cache(1000);
-
-  var map = {
-    efault: [0, '', ''],
-    legend: [1, '<fieldset>', '</fieldset>'],
-    tr: [2, '<table><tbody>', '</tbody></table>'],
-    col: [2, '<table><tbody></tbody><colgroup>', '</colgroup></table>']
-  };
-
-  map.td = map.th = [3, '<table><tbody><tr>', '</tr></tbody></table>'];
-
-  map.option = map.optgroup = [1, '<select multiple="multiple">', '</select>'];
-
-  map.thead = map.tbody = map.colgroup = map.caption = map.tfoot = [1, '<table>', '</table>'];
-
-  map.g = map.defs = map.symbol = map.use = map.image = map.text = map.circle = map.ellipse = map.line = map.path = map.polygon = map.polyline = map.rect = [1, '<svg ' + 'xmlns="http://www.w3.org/2000/svg" ' + 'xmlns:xlink="http://www.w3.org/1999/xlink" ' + 'xmlns:ev="http://www.w3.org/2001/xml-events"' + 'version="1.1">', '</svg>'];
-
-  /**
-   * Check if a node is a supported template node with a
-   * DocumentFragment content.
-   *
-   * @param {Node} node
-   * @return {Boolean}
-   */
-
-  function isRealTemplate(node) {
-    return isTemplate(node) && isFragment(node.content);
-  }
-
-  var tagRE$1 = /<([\w:-]+)/;
-  var entityRE = /&#?\w+?;/;
-  var commentRE = /<!--/;
-
-  /**
-   * Convert a string template to a DocumentFragment.
-   * Determines correct wrapping by tag types. Wrapping
-   * strategy found in jQuery & component/domify.
-   *
-   * @param {String} templateString
-   * @param {Boolean} raw
-   * @return {DocumentFragment}
-   */
-
-  function stringToFragment(templateString, raw) {
-    // try a cache hit first
-    var cacheKey = raw ? templateString : templateString.trim();
-    var hit = templateCache.get(cacheKey);
-    if (hit) {
-      return hit;
-    }
-
-    var frag = document.createDocumentFragment();
-    var tagMatch = templateString.match(tagRE$1);
-    var entityMatch = entityRE.test(templateString);
-    var commentMatch = commentRE.test(templateString);
-
-    if (!tagMatch && !entityMatch && !commentMatch) {
-      // text only, return a single text node.
-      frag.appendChild(document.createTextNode(templateString));
-    } else {
-      var tag = tagMatch && tagMatch[1];
-      var wrap = map[tag] || map.efault;
-      var depth = wrap[0];
-      var prefix = wrap[1];
-      var suffix = wrap[2];
-      var node = document.createElement('div');
-
-      node.innerHTML = prefix + templateString + suffix;
-      while (depth--) {
-        node = node.lastChild;
-      }
-
-      var child;
-      /* eslint-disable no-cond-assign */
-      while (child = node.firstChild) {
-        /* eslint-enable no-cond-assign */
-        frag.appendChild(child);
-      }
-    }
-    if (!raw) {
-      trimNode(frag);
-    }
-    templateCache.put(cacheKey, frag);
-    return frag;
-  }
-
-  /**
-   * Convert a template node to a DocumentFragment.
-   *
-   * @param {Node} node
-   * @return {DocumentFragment}
-   */
-
-  function nodeToFragment(node) {
-    // if its a template tag and the browser supports it,
-    // its content is already a document fragment. However, iOS Safari has
-    // bug when using directly cloned template content with touch
-    // events and can cause crashes when the nodes are removed from DOM, so we
-    // have to treat template elements as string templates. (#2805)
-    /* istanbul ignore if */
-    if (isRealTemplate(node)) {
-      return stringToFragment(node.innerHTML);
-    }
-    // script template
-    if (node.tagName === 'SCRIPT') {
-      return stringToFragment(node.textContent);
-    }
-    // normal node, clone it to avoid mutating the original
-    var clonedNode = cloneNode(node);
-    var frag = document.createDocumentFragment();
-    var child;
-    /* eslint-disable no-cond-assign */
-    while (child = clonedNode.firstChild) {
-      /* eslint-enable no-cond-assign */
-      frag.appendChild(child);
-    }
-    trimNode(frag);
-    return frag;
-  }
-
-  // Test for the presence of the Safari template cloning bug
-  // https://bugs.webkit.org/showug.cgi?id=137755
-  var hasBrokenTemplate = (function () {
-    /* istanbul ignore else */
-    if (inBrowser) {
-      var a = document.createElement('div');
-      a.innerHTML = '<template>1</template>';
-      return !a.cloneNode(true).firstChild.innerHTML;
-    } else {
-      return false;
-    }
-  })();
-
-  // Test for IE10/11 textarea placeholder clone bug
-  var hasTextareaCloneBug = (function () {
-    /* istanbul ignore else */
-    if (inBrowser) {
-      var t = document.createElement('textarea');
-      t.placeholder = 't';
-      return t.cloneNode(true).value === 't';
-    } else {
-      return false;
-    }
-  })();
-
-  /**
-   * 1. Deal with Safari cloning nested <template> bug by
-   *    manually cloning all template instances.
-   * 2. Deal with IE10/11 textarea placeholder bug by setting
-   *    the correct value after cloning.
-   *
-   * @param {Element|DocumentFragment} node
-   * @return {Element|DocumentFragment}
-   */
-
-  function cloneNode(node) {
-    /* istanbul ignore if */
-    if (!node.querySelectorAll) {
-      return node.cloneNode();
-    }
-    var res = node.cloneNode(true);
-    var i, original, cloned;
-    /* istanbul ignore if */
-    if (hasBrokenTemplate) {
-      var tempClone = res;
-      if (isRealTemplate(node)) {
-        node = node.content;
-        tempClone = res.content;
-      }
-      original = node.querySelectorAll('template');
-      if (original.length) {
-        cloned = tempClone.querySelectorAll('template');
-        i = cloned.length;
-        while (i--) {
-          cloned[i].parentNode.replaceChild(cloneNode(original[i]), cloned[i]);
-        }
-      }
-    }
-    /* istanbul ignore if */
-    if (hasTextareaCloneBug) {
-      if (node.tagName === 'TEXTAREA') {
-        res.value = node.value;
-      } else {
-        original = node.querySelectorAll('textarea');
-        if (original.length) {
-          cloned = res.querySelectorAll('textarea');
-          i = cloned.length;
-          while (i--) {
-            cloned[i].value = original[i].value;
-          }
-        }
-      }
-    }
-    return res;
-  }
-
-  /**
-   * Process the template option and normalizes it into a
-   * a DocumentFragment that can be used as a partial or a
-   * instance template.
-   *
-   * @param {*} template
-   *        Possible values include:
-   *        - DocumentFragment object
-   *        - Node object of type Template
-   *        - id selector: '#some-template-id'
-   *        - template string: '<div><span>{{msg}}</span></div>'
-   * @param {Boolean} shouldClone
-   * @param {Boolean} raw
-   *        inline HTML interpolation. Do not check for id
-   *        selector and keep whitespace in the string.
-   * @return {DocumentFragment|undefined}
-   */
-
-  function parseTemplate(template, shouldClone, raw) {
-    var node, frag;
-
-    // if the template is already a document fragment,
-    // do nothing
-    if (isFragment(template)) {
-      trimNode(template);
-      return shouldClone ? cloneNode(template) : template;
-    }
-
-    if (typeof template === 'string') {
-      // id selector
-      if (!raw && template.charAt(0) === '#') {
-        // id selector can be cached too
-        frag = idSelectorCache.get(template);
-        if (!frag) {
-          node = document.getElementById(template.slice(1));
-          if (node) {
-            frag = nodeToFragment(node);
-            // save selector to cache
-            idSelectorCache.put(template, frag);
-          }
-        }
-      } else {
-        // normal string template
-        frag = stringToFragment(template, raw);
-      }
-    } else if (template.nodeType) {
-      // a direct node
-      frag = nodeToFragment(template);
-    }
-
-    return frag && shouldClone ? cloneNode(frag) : frag;
-  }
-
-var template = Object.freeze({
-    cloneNode: cloneNode,
-    parseTemplate: parseTemplate
-  });
-
-  var html = {
-
-    bind: function bind() {
-      // a comment node means this is a binding for
-      // {{{ inline unescaped html }}}
-      if (this.el.nodeType === 8) {
-        // hold nodes
-        this.nodes = [];
-        // replace the placeholder with proper anchor
-        this.anchor = createAnchor('v-html');
-        replace(this.el, this.anchor);
-      }
-    },
-
-    update: function update(value) {
-      value = _toString(value);
-      if (this.nodes) {
-        this.swap(value);
-      } else {
-        this.el.innerHTML = value;
-      }
-    },
-
-    swap: function swap(value) {
-      // remove old nodes
-      var i = this.nodes.length;
-      while (i--) {
-        remove(this.nodes[i]);
-      }
-      // convert new value to a fragment
-      // do not attempt to retrieve from id selector
-      var frag = parseTemplate(value, true, true);
-      // save a reference to these nodes so we can remove later
-      this.nodes = toArray(frag.childNodes);
-      before(frag, this.anchor);
-    }
-  };
-
-  /**
-   * Abstraction for a partially-compiled fragment.
-   * Can optionally compile content with a child scope.
-   *
-   * @param {Function} linker
-   * @param {Vue} vm
-   * @param {DocumentFragment} frag
-   * @param {Vue} [host]
-   * @param {Object} [scope]
-   * @param {Fragment} [parentFrag]
-   */
-  function Fragment(linker, vm, frag, host, scope, parentFrag) {
-    this.children = [];
-    this.childFrags = [];
-    this.vm = vm;
-    this.scope = scope;
-    this.inserted = false;
-    this.parentFrag = parentFrag;
-    if (parentFrag) {
-      parentFrag.childFrags.push(this);
-    }
-    this.unlink = linker(vm, frag, host, scope, this);
-    var single = this.single = frag.childNodes.length === 1 &&
-    // do not go single mode if the only node is an anchor
-    !frag.childNodes[0].__v_anchor;
-    if (single) {
-      this.node = frag.childNodes[0];
-      this.before = singleBefore;
-      this.remove = singleRemove;
-    } else {
-      this.node = createAnchor('fragment-start');
-      this.end = createAnchor('fragment-end');
-      this.frag = frag;
-      prepend(this.node, frag);
-      frag.appendChild(this.end);
-      this.before = multiBefore;
-      this.remove = multiRemove;
-    }
-    this.node.__v_frag = this;
-  }
-
-  /**
-   * Call attach/detach for all components contained within
-   * this fragment. Also do so recursively for all child
-   * fragments.
-   *
-   * @param {Function} hook
-   */
-
-  Fragment.prototype.callHook = function (hook) {
-    var i, l;
-    for (i = 0, l = this.childFrags.length; i < l; i++) {
-      this.childFrags[i].callHook(hook);
-    }
-    for (i = 0, l = this.children.length; i < l; i++) {
-      hook(this.children[i]);
-    }
-  };
-
-  /**
-   * Insert fragment before target, single node version
-   *
-   * @param {Node} target
-   * @param {Boolean} withTransition
-   */
-
-  function singleBefore(target, withTransition) {
-    this.inserted = true;
-    var method = withTransition !== false ? beforeWithTransition : before;
-    method(this.node, target, this.vm);
-    if (inDoc(this.node)) {
-      this.callHook(attach);
-    }
-  }
-
-  /**
-   * Remove fragment, single node version
-   */
-
-  function singleRemove() {
-    this.inserted = false;
-    var shouldCallRemove = inDoc(this.node);
-    var self = this;
-    this.beforeRemove();
-    removeWithTransition(this.node, this.vm, function () {
-      if (shouldCallRemove) {
-        self.callHook(detach);
-      }
-      self.destroy();
-    });
-  }
-
-  /**
-   * Insert fragment before target, multi-nodes version
-   *
-   * @param {Node} target
-   * @param {Boolean} withTransition
-   */
-
-  function multiBefore(target, withTransition) {
-    this.inserted = true;
-    var vm = this.vm;
-    var method = withTransition !== false ? beforeWithTransition : before;
-    mapNodeRange(this.node, this.end, function (node) {
-      method(node, target, vm);
-    });
-    if (inDoc(this.node)) {
-      this.callHook(attach);
-    }
-  }
-
-  /**
-   * Remove fragment, multi-nodes version
-   */
-
-  function multiRemove() {
-    this.inserted = false;
-    var self = this;
-    var shouldCallRemove = inDoc(this.node);
-    this.beforeRemove();
-    removeNodeRange(this.node, this.end, this.vm, this.frag, function () {
-      if (shouldCallRemove) {
-        self.callHook(detach);
-      }
-      self.destroy();
-    });
-  }
-
-  /**
-   * Prepare the fragment for removal.
-   */
-
-  Fragment.prototype.beforeRemove = function () {
-    var i, l;
-    for (i = 0, l = this.childFrags.length; i < l; i++) {
-      // call the same method recursively on child
-      // fragments, depth-first
-      this.childFrags[i].beforeRemove(false);
-    }
-    for (i = 0, l = this.children.length; i < l; i++) {
-      // Call destroy for all contained instances,
-      // with remove:false and defer:true.
-      // Defer is necessary because we need to
-      // keep the children to call detach hooks
-      // on them.
-      this.children[i].$destroy(false, true);
-    }
-    var dirs = this.unlink.dirs;
-    for (i = 0, l = dirs.length; i < l; i++) {
-      // disable the watchers on all the directives
-      // so that the rendered content stays the same
-      // during removal.
-      dirs[i]._watcher && dirs[i]._watcher.teardown();
-    }
-  };
-
-  /**
-   * Destroy the fragment.
-   */
-
-  Fragment.prototype.destroy = function () {
-    if (this.parentFrag) {
-      this.parentFrag.childFrags.$remove(this);
-    }
-    this.node.__v_frag = null;
-    this.unlink();
-  };
-
-  /**
-   * Call attach hook for a Vue instance.
-   *
-   * @param {Vue} child
-   */
-
-  function attach(child) {
-    if (!child._isAttached && inDoc(child.$el)) {
-      child._callHook('attached');
-    }
-  }
-
-  /**
-   * Call detach hook for a Vue instance.
-   *
-   * @param {Vue} child
-   */
-
-  function detach(child) {
-    if (child._isAttached && !inDoc(child.$el)) {
-      child._callHook('detached');
-    }
-  }
-
-  var linkerCache = new Cache(5000);
-
-  /**
-   * A factory that can be used to create instances of a
-   * fragment. Caches the compiled linker if possible.
-   *
-   * @param {Vue} vm
-   * @param {Element|String} el
-   */
-  function FragmentFactory(vm, el) {
-    this.vm = vm;
-    var template;
-    var isString = typeof el === 'string';
-    if (isString || isTemplate(el) && !el.hasAttribute('v-if')) {
-      template = parseTemplate(el, true);
-    } else {
-      template = document.createDocumentFragment();
-      template.appendChild(el);
-    }
-    this.template = template;
-    // linker can be cached, but only for components
-    var linker;
-    var cid = vm.constructor.cid;
-    if (cid > 0) {
-      var cacheId = cid + (isString ? el : getOuterHTML(el));
-      linker = linkerCache.get(cacheId);
-      if (!linker) {
-        linker = compile(template, vm.$options, true);
-        linkerCache.put(cacheId, linker);
-      }
-    } else {
-      linker = compile(template, vm.$options, true);
-    }
-    this.linker = linker;
-  }
-
-  /**
-   * Create a fragment instance with given host and scope.
-   *
-   * @param {Vue} host
-   * @param {Object} scope
-   * @param {Fragment} parentFrag
-   */
-
-  FragmentFactory.prototype.create = function (host, scope, parentFrag) {
-    var frag = cloneNode(this.template);
-    return new Fragment(this.linker, this.vm, frag, host, scope, parentFrag);
-  };
-
-  var ON = 700;
-  var MODEL = 800;
-  var BIND = 850;
-  var TRANSITION = 1100;
-  var EL = 1500;
-  var COMPONENT = 1500;
-  var PARTIAL = 1750;
-  var IF = 2100;
-  var FOR = 2200;
-  var SLOT = 2300;
-
-  var uid$3 = 0;
-
-  var vFor = {
-
-    priority: FOR,
-    terminal: true,
-
-    params: ['track-by', 'stagger', 'enter-stagger', 'leave-stagger'],
-
-    bind: function bind() {
-      // support "item in/of items" syntax
-      var inMatch = this.expression.match(/(.*) (?:in|of) (.*)/);
-      if (inMatch) {
-        var itMatch = inMatch[1].match(/\((.*),(.*)\)/);
-        if (itMatch) {
-          this.iterator = itMatch[1].trim();
-          this.alias = itMatch[2].trim();
-        } else {
-          this.alias = inMatch[1].trim();
-        }
-        this.expression = inMatch[2];
-      }
-
-      if (!this.alias) {
-        'development' !== 'production' && warn('Invalid v-for expression "' + this.descriptor.raw + '": ' + 'alias is required.', this.vm);
-        return;
-      }
-
-      // uid as a cache identifier
-      this.id = '__v-for__' + ++uid$3;
-
-      // check if this is an option list,
-      // so that we know if we need to update the <select>'s
-      // v-model when the option list has changed.
-      // because v-model has a lower priority than v-for,
-      // the v-model is not bound here yet, so we have to
-      // retrive it in the actual updateModel() function.
-      var tag = this.el.tagName;
-      this.isOption = (tag === 'OPTION' || tag === 'OPTGROUP') && this.el.parentNode.tagName === 'SELECT';
-
-      // setup anchor nodes
-      this.start = createAnchor('v-for-start');
-      this.end = createAnchor('v-for-end');
-      replace(this.el, this.end);
-      before(this.start, this.end);
-
-      // cache
-      this.cache = Object.create(null);
-
-      // fragment factory
-      this.factory = new FragmentFactory(this.vm, this.el);
-    },
-
-    update: function update(data) {
-      this.diff(data);
-      this.updateRef();
-      this.updateModel();
-    },
-
-    /**
-     * Diff, based on new data and old data, determine the
-     * minimum amount of DOM manipulations needed to make the
-     * DOM reflect the new data Array.
-     *
-     * The algorithm diffs the new data Array by storing a
-     * hidden reference to an owner vm instance on previously
-     * seen data. This allows us to achieve O(n) which is
-     * better than a levenshtein distance based algorithm,
-     * which is O(m * n).
-     *
-     * @param {Array} data
-     */
-
-    diff: function diff(data) {
-      // check if the Array was converted from an Object
-      var item = data[0];
-      var convertedFromObject = this.fromObject = isObject(item) && hasOwn(item, '$key') && hasOwn(item, '$value');
-
-      var trackByKey = this.params.trackBy;
-      var oldFrags = this.frags;
-      var frags = this.frags = new Array(data.length);
-      var alias = this.alias;
-      var iterator = this.iterator;
-      var start = this.start;
-      var end = this.end;
-      var inDocument = inDoc(start);
-      var init = !oldFrags;
-      var i, l, frag, key, value, primitive;
-
-      // First pass, go through the new Array and fill up
-      // the new frags array. If a piece of data has a cached
-      // instance for it, we reuse it. Otherwise build a new
-      // instance.
-      for (i = 0, l = data.length; i < l; i++) {
-        item = data[i];
-        key = convertedFromObject ? item.$key : null;
-        value = convertedFromObject ? item.$value : item;
-        primitive = !isObject(value);
-        frag = !init && this.getCachedFrag(value, i, key);
-        if (frag) {
-          // reusable fragment
-          frag.reused = true;
-          // update $index
-          frag.scope.$index = i;
-          // update $key
-          if (key) {
-            frag.scope.$key = key;
-          }
-          // update iterator
-          if (iterator) {
-            frag.scope[iterator] = key !== null ? key : i;
-          }
-          // update data for track-by, object repeat &
-          // primitive values.
-          if (trackByKey || convertedFromObject || primitive) {
-            withoutConversion(function () {
-              frag.scope[alias] = value;
-            });
-          }
-        } else {
-          // new isntance
-          frag = this.create(value, alias, i, key);
-          frag.fresh = !init;
-        }
-        frags[i] = frag;
-        if (init) {
-          frag.before(end);
-        }
-      }
-
-      // we're done for the initial render.
-      if (init) {
-        return;
-      }
-
-      // Second pass, go through the old fragments and
-      // destroy those who are not reused (and remove them
-      // from cache)
-      var removalIndex = 0;
-      var totalRemoved = oldFrags.length - frags.length;
-      // when removing a large number of fragments, watcher removal
-      // turns out to be a perf bottleneck, so we batch the watcher
-      // removals into a single filter call!
-      this.vm._vForRemoving = true;
-      for (i = 0, l = oldFrags.length; i < l; i++) {
-        frag = oldFrags[i];
-        if (!frag.reused) {
-          this.deleteCachedFrag(frag);
-          this.remove(frag, removalIndex++, totalRemoved, inDocument);
-        }
-      }
-      this.vm._vForRemoving = false;
-      if (removalIndex) {
-        this.vm._watchers = this.vm._watchers.filter(function (w) {
-          return w.active;
-        });
-      }
-
-      // Final pass, move/insert new fragments into the
-      // right place.
-      var targetPrev, prevEl, currentPrev;
-      var insertionIndex = 0;
-      for (i = 0, l = frags.length; i < l; i++) {
-        frag = frags[i];
-        // this is the frag that we should be after
-        targetPrev = frags[i - 1];
-        prevEl = targetPrev ? targetPrev.staggerCb ? targetPrev.staggerAnchor : targetPrev.end || targetPrev.node : start;
-        if (frag.reused && !frag.staggerCb) {
-          currentPrev = findPrevFrag(frag, start, this.id);
-          if (currentPrev !== targetPrev && (!currentPrev ||
-          // optimization for moving a single item.
-          // thanks to suggestions by @livoras in #1807
-          findPrevFrag(currentPrev, start, this.id) !== targetPrev)) {
-            this.move(frag, prevEl);
-          }
-        } else {
-          // new instance, or still in stagger.
-          // insert with updated stagger index.
-          this.insert(frag, insertionIndex++, prevEl, inDocument);
-        }
-        frag.reused = frag.fresh = false;
-      }
-    },
-
-    /**
-     * Create a new fragment instance.
-     *
-     * @param {*} value
-     * @param {String} alias
-     * @param {Number} index
-     * @param {String} [key]
-     * @return {Fragment}
-     */
-
-    create: function create(value, alias, index, key) {
-      var host = this._host;
-      // create iteration scope
-      var parentScope = this._scope || this.vm;
-      var scope = Object.create(parentScope);
-      // ref holder for the scope
-      scope.$refs = Object.create(parentScope.$refs);
-      scope.$els = Object.create(parentScope.$els);
-      // make sure point $parent to parent scope
-      scope.$parent = parentScope;
-      // for two-way binding on alias
-      scope.$forContext = this;
-      // define scope properties
-      // important: define the scope alias without forced conversion
-      // so that frozen data structures remain non-reactive.
-      withoutConversion(function () {
-        defineReactive(scope, alias, value);
-      });
-      defineReactive(scope, '$index', index);
-      if (key) {
-        defineReactive(scope, '$key', key);
-      } else if (scope.$key) {
-        // avoid accidental fallback
-        def(scope, '$key', null);
-      }
-      if (this.iterator) {
-        defineReactive(scope, this.iterator, key !== null ? key : index);
-      }
-      var frag = this.factory.create(host, scope, this._frag);
-      frag.forId = this.id;
-      this.cacheFrag(value, frag, index, key);
-      return frag;
-    },
-
-    /**
-     * Update the v-ref on owner vm.
-     */
-
-    updateRef: function updateRef() {
-      var ref = this.descriptor.ref;
-      if (!ref) return;
-      var hash = (this._scope || this.vm).$refs;
-      var refs;
-      if (!this.fromObject) {
-        refs = this.frags.map(findVmFromFrag);
-      } else {
-        refs = {};
-        this.frags.forEach(function (frag) {
-          refs[frag.scope.$key] = findVmFromFrag(frag);
-        });
-      }
-      hash[ref] = refs;
-    },
-
-    /**
-     * For option lists, update the containing v-model on
-     * parent <select>.
-     */
-
-    updateModel: function updateModel() {
-      if (this.isOption) {
-        var parent = this.start.parentNode;
-        var model = parent && parent.__v_model;
-        if (model) {
-          model.forceUpdate();
-        }
-      }
-    },
-
-    /**
-     * Insert a fragment. Handles staggering.
-     *
-     * @param {Fragment} frag
-     * @param {Number} index
-     * @param {Node} prevEl
-     * @param {Boolean} inDocument
-     */
-
-    insert: function insert(frag, index, prevEl, inDocument) {
-      if (frag.staggerCb) {
-        frag.staggerCb.cancel();
-        frag.staggerCb = null;
-      }
-      var staggerAmount = this.getStagger(frag, index, null, 'enter');
-      if (inDocument && staggerAmount) {
-        // create an anchor and insert it synchronously,
-        // so that we can resolve the correct order without
-        // worrying about some elements not inserted yet
-        var anchor = frag.staggerAnchor;
-        if (!anchor) {
-          anchor = frag.staggerAnchor = createAnchor('stagger-anchor');
-          anchor.__v_frag = frag;
-        }
-        after(anchor, prevEl);
-        var op = frag.staggerCb = cancellable(function () {
-          frag.staggerCb = null;
-          frag.before(anchor);
-          remove(anchor);
-        });
-        setTimeout(op, staggerAmount);
-      } else {
-        var target = prevEl.nextSibling;
-        /* istanbul ignore if */
-        if (!target) {
-          // reset end anchor position in case the position was messed up
-          // by an external drag-n-drop library.
-          after(this.end, prevEl);
-          target = this.end;
-        }
-        frag.before(target);
-      }
-    },
-
-    /**
-     * Remove a fragment. Handles staggering.
-     *
-     * @param {Fragment} frag
-     * @param {Number} index
-     * @param {Number} total
-     * @param {Boolean} inDocument
-     */
-
-    remove: function remove(frag, index, total, inDocument) {
-      if (frag.staggerCb) {
-        frag.staggerCb.cancel();
-        frag.staggerCb = null;
-        // it's not possible for the same frag to be removed
-        // twice, so if we have a pending stagger callback,
-        // it means this frag is queued for enter but removed
-        // before its transition started. Since it is already
-        // destroyed, we can just leave it in detached state.
-        return;
-      }
-      var staggerAmount = this.getStagger(frag, index, total, 'leave');
-      if (inDocument && staggerAmount) {
-        var op = frag.staggerCb = cancellable(function () {
-          frag.staggerCb = null;
-          frag.remove();
-        });
-        setTimeout(op, staggerAmount);
-      } else {
-        frag.remove();
-      }
-    },
-
-    /**
-     * Move a fragment to a new position.
-     * Force no transition.
-     *
-     * @param {Fragment} frag
-     * @param {Node} prevEl
-     */
-
-    move: function move(frag, prevEl) {
-      // fix a common issue with Sortable:
-      // if prevEl doesn't have nextSibling, this means it's
-      // been dragged after the end anchor. Just re-position
-      // the end anchor to the end of the container.
-      /* istanbul ignore if */
-      if (!prevEl.nextSibling) {
-        this.end.parentNode.appendChild(this.end);
-      }
-      frag.before(prevEl.nextSibling, false);
-    },
-
-    /**
-     * Cache a fragment using track-by or the object key.
-     *
-     * @param {*} value
-     * @param {Fragment} frag
-     * @param {Number} index
-     * @param {String} [key]
-     */
-
-    cacheFrag: function cacheFrag(value, frag, index, key) {
-      var trackByKey = this.params.trackBy;
-      var cache = this.cache;
-      var primitive = !isObject(value);
-      var id;
-      if (key || trackByKey || primitive) {
-        id = getTrackByKey(index, key, value, trackByKey);
-        if (!cache[id]) {
-          cache[id] = frag;
-        } else if (trackByKey !== '$index') {
-          'development' !== 'production' && this.warnDuplicate(value);
-        }
-      } else {
-        id = this.id;
-        if (hasOwn(value, id)) {
-          if (value[id] === null) {
-            value[id] = frag;
-          } else {
-            'development' !== 'production' && this.warnDuplicate(value);
-          }
-        } else if (Object.isExtensible(value)) {
-          def(value, id, frag);
-        } else if ('development' !== 'production') {
-          warn('Frozen v-for objects cannot be automatically tracked, make sure to ' + 'provide a track-by key.');
-        }
-      }
-      frag.raw = value;
-    },
-
-    /**
-     * Get a cached fragment from the value/index/key
-     *
-     * @param {*} value
-     * @param {Number} index
-     * @param {String} key
-     * @return {Fragment}
-     */
-
-    getCachedFrag: function getCachedFrag(value, index, key) {
-      var trackByKey = this.params.trackBy;
-      var primitive = !isObject(value);
-      var frag;
-      if (key || trackByKey || primitive) {
-        var id = getTrackByKey(index, key, value, trackByKey);
-        frag = this.cache[id];
-      } else {
-        frag = value[this.id];
-      }
-      if (frag && (frag.reused || frag.fresh)) {
-        'development' !== 'production' && this.warnDuplicate(value);
-      }
-      return frag;
-    },
-
-    /**
-     * Delete a fragment from cache.
-     *
-     * @param {Fragment} frag
-     */
-
-    deleteCachedFrag: function deleteCachedFrag(frag) {
-      var value = frag.raw;
-      var trackByKey = this.params.trackBy;
-      var scope = frag.scope;
-      var index = scope.$index;
-      // fix #948: avoid accidentally fall through to
-      // a parent repeater which happens to have $key.
-      var key = hasOwn(scope, '$key') && scope.$key;
-      var primitive = !isObject(value);
-      if (trackByKey || key || primitive) {
-        var id = getTrackByKey(index, key, value, trackByKey);
-        this.cache[id] = null;
-      } else {
-        value[this.id] = null;
-        frag.raw = null;
-      }
-    },
-
-    /**
-     * Get the stagger amount for an insertion/removal.
-     *
-     * @param {Fragment} frag
-     * @param {Number} index
-     * @param {Number} total
-     * @param {String} type
-     */
-
-    getStagger: function getStagger(frag, index, total, type) {
-      type = type + 'Stagger';
-      var trans = frag.node.__v_trans;
-      var hooks = trans && trans.hooks;
-      var hook = hooks && (hooks[type] || hooks.stagger);
-      return hook ? hook.call(frag, index, total) : index * parseInt(this.params[type] || this.params.stagger, 10);
-    },
-
-    /**
-     * Pre-process the value before piping it through the
-     * filters. This is passed to and called by the watcher.
-     */
-
-    _preProcess: function _preProcess(value) {
-      // regardless of type, store the un-filtered raw value.
-      this.rawValue = value;
-      return value;
-    },
-
-    /**
-     * Post-process the value after it has been piped through
-     * the filters. This is passed to and called by the watcher.
-     *
-     * It is necessary for this to be called during the
-     * watcher's dependency collection phase because we want
-     * the v-for to update when the source Object is mutated.
-     */
-
-    _postProcess: function _postProcess(value) {
-      if (isArray(value)) {
-        return value;
-      } else if (isPlainObject(value)) {
-        // convert plain object to array.
-        var keys = Object.keys(value);
-        var i = keys.length;
-        var res = new Array(i);
-        var key;
-        while (i--) {
-          key = keys[i];
-          res[i] = {
-            $key: key,
-            $value: value[key]
-          };
-        }
-        return res;
-      } else {
-        if (typeof value === 'number' && !isNaN(value)) {
-          value = range(value);
-        }
-        return value || [];
-      }
-    },
-
-    unbind: function unbind() {
-      if (this.descriptor.ref) {
-        (this._scope || this.vm).$refs[this.descriptor.ref] = null;
-      }
-      if (this.frags) {
-        var i = this.frags.length;
-        var frag;
-        while (i--) {
-          frag = this.frags[i];
-          this.deleteCachedFrag(frag);
-          frag.destroy();
-        }
-      }
-    }
-  };
-
-  /**
-   * Helper to find the previous element that is a fragment
-   * anchor. This is necessary because a destroyed frag's
-   * element could still be lingering in the DOM before its
-   * leaving transition finishes, but its inserted flag
-   * should have been set to false so we can skip them.
-   *
-   * If this is a block repeat, we want to make sure we only
-   * return frag that is bound to this v-for. (see #929)
-   *
-   * @param {Fragment} frag
-   * @param {Comment|Text} anchor
-   * @param {String} id
-   * @return {Fragment}
-   */
-
-  function findPrevFrag(frag, anchor, id) {
-    var el = frag.node.previousSibling;
-    /* istanbul ignore if */
-    if (!el) return;
-    frag = el.__v_frag;
-    while ((!frag || frag.forId !== id || !frag.inserted) && el !== anchor) {
-      el = el.previousSibling;
-      /* istanbul ignore if */
-      if (!el) return;
-      frag = el.__v_frag;
-    }
-    return frag;
-  }
-
-  /**
-   * Find a vm from a fragment.
-   *
-   * @param {Fragment} frag
-   * @return {Vue|undefined}
-   */
-
-  function findVmFromFrag(frag) {
-    var node = frag.node;
-    // handle multi-node frag
-    if (frag.end) {
-      while (!node.__vue__ && node !== frag.end && node.nextSibling) {
-        node = node.nextSibling;
-      }
-    }
-    return node.__vue__;
-  }
-
-  /**
-   * Create a range array from given number.
-   *
-   * @param {Number} n
-   * @return {Array}
-   */
-
-  function range(n) {
-    var i = -1;
-    var ret = new Array(Math.floor(n));
-    while (++i < n) {
-      ret[i] = i;
-    }
-    return ret;
-  }
-
-  /**
-   * Get the track by key for an item.
-   *
-   * @param {Number} index
-   * @param {String} key
-   * @param {*} value
-   * @param {String} [trackByKey]
-   */
-
-  function getTrackByKey(index, key, value, trackByKey) {
-    return trackByKey ? trackByKey === '$index' ? index : trackByKey.charAt(0).match(/\w/) ? getPath(value, trackByKey) : value[trackByKey] : key || value;
-  }
-
-  if ('development' !== 'production') {
-    vFor.warnDuplicate = function (value) {
-      warn('Duplicate value found in v-for="' + this.descriptor.raw + '": ' + JSON.stringify(value) + '. Use track-by="$index" if ' + 'you are expecting duplicate values.', this.vm);
+  function proxy (target, sourceKey, key) {
+    sharedPropertyDefinition.get = function proxyGetter () {
+      return this[sourceKey][key]
     };
+    sharedPropertyDefinition.set = function proxySetter (val) {
+      this[sourceKey][key] = val;
+    };
+    Object.defineProperty(target, key, sharedPropertyDefinition);
   }
 
-  var vIf = {
-
-    priority: IF,
-    terminal: true,
-
-    bind: function bind() {
-      var el = this.el;
-      if (!el.__vue__) {
-        // check else block
-        var next = el.nextElementSibling;
-        if (next && getAttr(next, 'v-else') !== null) {
-          remove(next);
-          this.elseEl = next;
-        }
-        // check main block
-        this.anchor = createAnchor('v-if');
-        replace(el, this.anchor);
-      } else {
-        'development' !== 'production' && warn('v-if="' + this.expression + '" cannot be ' + 'used on an instance root element.', this.vm);
-        this.invalid = true;
-      }
-    },
-
-    update: function update(value) {
-      if (this.invalid) return;
-      if (value) {
-        if (!this.frag) {
-          this.insert();
-        }
-      } else {
-        this.remove();
-      }
-    },
-
-    insert: function insert() {
-      if (this.elseFrag) {
-        this.elseFrag.remove();
-        this.elseFrag = null;
-      }
-      // lazy init factory
-      if (!this.factory) {
-        this.factory = new FragmentFactory(this.vm, this.el);
-      }
-      this.frag = this.factory.create(this._host, this._scope, this._frag);
-      this.frag.before(this.anchor);
-    },
-
-    remove: function remove() {
-      if (this.frag) {
-        this.frag.remove();
-        this.frag = null;
-      }
-      if (this.elseEl && !this.elseFrag) {
-        if (!this.elseFactory) {
-          this.elseFactory = new FragmentFactory(this.elseEl._context || this.vm, this.elseEl);
-        }
-        this.elseFrag = this.elseFactory.create(this._host, this._scope, this._frag);
-        this.elseFrag.before(this.anchor);
-      }
-    },
-
-    unbind: function unbind() {
-      if (this.frag) {
-        this.frag.destroy();
-      }
-      if (this.elseFrag) {
-        this.elseFrag.destroy();
-      }
+  function initState (vm) {
+    vm._watchers = [];
+    var opts = vm.$options;
+    if (opts.props) { initProps(vm, opts.props); }
+    if (opts.methods) { initMethods(vm, opts.methods); }
+    if (opts.data) {
+      initData(vm);
+    } else {
+      observe(vm._data = {}, true /* asRootData */);
     }
-  };
-
-  var show = {
-
-    bind: function bind() {
-      // check else block
-      var next = this.el.nextElementSibling;
-      if (next && getAttr(next, 'v-else') !== null) {
-        this.elseEl = next;
-      }
-    },
-
-    update: function update(value) {
-      this.apply(this.el, value);
-      if (this.elseEl) {
-        this.apply(this.elseEl, !value);
-      }
-    },
-
-    apply: function apply(el, value) {
-      if (inDoc(el)) {
-        applyTransition(el, value ? 1 : -1, toggle, this.vm);
-      } else {
-        toggle();
-      }
-      function toggle() {
-        el.style.display = value ? '' : 'none';
-      }
+    if (opts.computed) { initComputed(vm, opts.computed); }
+    if (opts.watch && opts.watch !== nativeWatch) {
+      initWatch(vm, opts.watch);
     }
-  };
-
-  var text$2 = {
-
-    bind: function bind() {
-      var self = this;
-      var el = this.el;
-      var isRange = el.type === 'range';
-      var lazy = this.params.lazy;
-      var number = this.params.number;
-      var debounce = this.params.debounce;
-
-      // handle composition events.
-      //   http://blog.evanyou.me/2014/01/03/composition-event/
-      // skip this for Android because it handles composition
-      // events quite differently. Android doesn't trigger
-      // composition events for language input methods e.g.
-      // Chinese, but instead triggers them for spelling
-      // suggestions... (see Discussion/#162)
-      var composing = false;
-      if (!isAndroid && !isRange) {
-        this.on('compositionstart', function () {
-          composing = true;
-        });
-        this.on('compositionend', function () {
-          composing = false;
-          // in IE11 the "compositionend" event fires AFTER
-          // the "input" event, so the input handler is blocked
-          // at the end... have to call it here.
-          //
-          // #1327: in lazy mode this is unecessary.
-          if (!lazy) {
-            self.listener();
-          }
-        });
-      }
-
-      // prevent messing with the input when user is typing,
-      // and force update on blur.
-      this.focused = false;
-      if (!isRange && !lazy) {
-        this.on('focus', function () {
-          self.focused = true;
-        });
-        this.on('blur', function () {
-          self.focused = false;
-          // do not sync value after fragment removal (#2017)
-          if (!self._frag || self._frag.inserted) {
-            self.rawListener();
-          }
-        });
-      }
-
-      // Now attach the main listener
-      this.listener = this.rawListener = function () {
-        if (composing || !self._bound) {
-          return;
-        }
-        var val = number || isRange ? toNumber(el.value) : el.value;
-        self.set(val);
-        // force update on next tick to avoid lock & same value
-        // also only update when user is not typing
-        nextTick(function () {
-          if (self._bound && !self.focused) {
-            self.update(self._watcher.value);
-          }
-        });
-      };
-
-      // apply debounce
-      if (debounce) {
-        this.listener = _debounce(this.listener, debounce);
-      }
-
-      // Support jQuery events, since jQuery.trigger() doesn't
-      // trigger native events in some cases and some plugins
-      // rely on $.trigger()
-      //
-      // We want to make sure if a listener is attached using
-      // jQuery, it is also removed with jQuery, that's why
-      // we do the check for each directive instance and
-      // store that check result on itself. This also allows
-      // easier test coverage control by unsetting the global
-      // jQuery variable in tests.
-      this.hasjQuery = typeof jQuery === 'function';
-      if (this.hasjQuery) {
-        var method = jQuery.fn.on ? 'on' : 'bind';
-        jQuery(el)[method]('change', this.rawListener);
-        if (!lazy) {
-          jQuery(el)[method]('input', this.listener);
-        }
-      } else {
-        this.on('change', this.rawListener);
-        if (!lazy) {
-          this.on('input', this.listener);
-        }
-      }
-
-      // IE9 doesn't fire input event on backspace/del/cut
-      if (!lazy && isIE9) {
-        this.on('cut', function () {
-          nextTick(self.listener);
-        });
-        this.on('keyup', function (e) {
-          if (e.keyCode === 46 || e.keyCode === 8) {
-            self.listener();
-          }
-        });
-      }
-
-      // set initial value if present
-      if (el.hasAttribute('value') || el.tagName === 'TEXTAREA' && el.value.trim()) {
-        this.afterBind = this.listener;
-      }
-    },
-
-    update: function update(value) {
-      // #3029 only update when the value changes. This prevent
-      // browsers from overwriting values like selectionStart
-      value = _toString(value);
-      if (value !== this.el.value) this.el.value = value;
-    },
-
-    unbind: function unbind() {
-      var el = this.el;
-      if (this.hasjQuery) {
-        var method = jQuery.fn.off ? 'off' : 'unbind';
-        jQuery(el)[method]('change', this.listener);
-        jQuery(el)[method]('input', this.listener);
-      }
-    }
-  };
-
-  var radio = {
-
-    bind: function bind() {
-      var self = this;
-      var el = this.el;
-
-      this.getValue = function () {
-        // value overwrite via v-bind:value
-        if (el.hasOwnProperty('_value')) {
-          return el._value;
-        }
-        var val = el.value;
-        if (self.params.number) {
-          val = toNumber(val);
-        }
-        return val;
-      };
-
-      this.listener = function () {
-        self.set(self.getValue());
-      };
-      this.on('change', this.listener);
-
-      if (el.hasAttribute('checked')) {
-        this.afterBind = this.listener;
-      }
-    },
-
-    update: function update(value) {
-      this.el.checked = looseEqual(value, this.getValue());
-    }
-  };
-
-  var select = {
-
-    bind: function bind() {
-      var _this = this;
-
-      var self = this;
-      var el = this.el;
-
-      // method to force update DOM using latest value.
-      this.forceUpdate = function () {
-        if (self._watcher) {
-          self.update(self._watcher.get());
-        }
-      };
-
-      // check if this is a multiple select
-      var multiple = this.multiple = el.hasAttribute('multiple');
-
-      // attach listener
-      this.listener = function () {
-        var value = getValue(el, multiple);
-        value = self.params.number ? isArray(value) ? value.map(toNumber) : toNumber(value) : value;
-        self.set(value);
-      };
-      this.on('change', this.listener);
-
-      // if has initial value, set afterBind
-      var initValue = getValue(el, multiple, true);
-      if (multiple && initValue.length || !multiple && initValue !== null) {
-        this.afterBind = this.listener;
-      }
-
-      // All major browsers except Firefox resets
-      // selectedIndex with value -1 to 0 when the element
-      // is appended to a new parent, therefore we have to
-      // force a DOM update whenever that happens...
-      this.vm.$on('hook:attached', function () {
-        nextTick(_this.forceUpdate);
-      });
-      if (!inDoc(el)) {
-        nextTick(this.forceUpdate);
-      }
-    },
-
-    update: function update(value) {
-      var el = this.el;
-      el.selectedIndex = -1;
-      var multi = this.multiple && isArray(value);
-      var options = el.options;
-      var i = options.length;
-      var op, val;
-      while (i--) {
-        op = options[i];
-        val = op.hasOwnProperty('_value') ? op._value : op.value;
-        /* eslint-disable eqeqeq */
-        op.selected = multi ? indexOf$1(value, val) > -1 : looseEqual(value, val);
-        /* eslint-enable eqeqeq */
-      }
-    },
-
-    unbind: function unbind() {
-      /* istanbul ignore next */
-      this.vm.$off('hook:attached', this.forceUpdate);
-    }
-  };
-
-  /**
-   * Get select value
-   *
-   * @param {SelectElement} el
-   * @param {Boolean} multi
-   * @param {Boolean} init
-   * @return {Array|*}
-   */
-
-  function getValue(el, multi, init) {
-    var res = multi ? [] : null;
-    var op, val, selected;
-    for (var i = 0, l = el.options.length; i < l; i++) {
-      op = el.options[i];
-      selected = init ? op.hasAttribute('selected') : op.selected;
-      if (selected) {
-        val = op.hasOwnProperty('_value') ? op._value : op.value;
-        if (multi) {
-          res.push(val);
-        } else {
-          return val;
-        }
-      }
-    }
-    return res;
   }
 
-  /**
-   * Native Array.indexOf uses strict equal, but in this
-   * case we need to match string/numbers with custom equal.
-   *
-   * @param {Array} arr
-   * @param {*} val
-   */
+  function initProps (vm, propsOptions) {
+    var propsData = vm.$options.propsData || {};
+    var props = vm._props = {};
+    // cache prop keys so that future props updates can iterate using Array
+    // instead of dynamic object key enumeration.
+    var keys = vm.$options._propKeys = [];
+    var isRoot = !vm.$parent;
+    // root instance props should be converted
+    if (!isRoot) {
+      toggleObserving(false);
+    }
+    var loop = function ( key ) {
+      keys.push(key);
+      var value = validateProp(key, propsOptions, propsData, vm);
+      /* istanbul ignore else */
+      {
+        var hyphenatedKey = hyphenate(key);
+        if (isReservedAttribute(hyphenatedKey) ||
+            config.isReservedAttr(hyphenatedKey)) {
+          warn(
+            ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+            vm
+          );
+        }
+        defineReactive$$1(props, key, value, function () {
+          if (!isRoot && !isUpdatingChildComponent) {
+            warn(
+              "Avoid mutating a prop directly since the value will be " +
+              "overwritten whenever the parent component re-renders. " +
+              "Instead, use a data or computed property based on the prop's " +
+              "value. Prop being mutated: \"" + key + "\"",
+              vm
+            );
+          }
+        });
+      }
+      // static props are already proxied on the component's prototype
+      // during Vue.extend(). We only need to proxy props defined at
+      // instantiation here.
+      if (!(key in vm)) {
+        proxy(vm, "_props", key);
+      }
+    };
 
-  function indexOf$1(arr, val) {
-    var i = arr.length;
+    for (var key in propsOptions) loop( key );
+    toggleObserving(true);
+  }
+
+  function initData (vm) {
+    var data = vm.$options.data;
+    data = vm._data = typeof data === 'function'
+      ? getData(data, vm)
+      : data || {};
+    if (!isPlainObject(data)) {
+      data = {};
+      warn(
+        'data functions should return an object:\n' +
+        'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+        vm
+      );
+    }
+    // proxy data on instance
+    var keys = Object.keys(data);
+    var props = vm.$options.props;
+    var methods = vm.$options.methods;
+    var i = keys.length;
     while (i--) {
-      if (looseEqual(arr[i], val)) {
-        return i;
+      var key = keys[i];
+      {
+        if (methods && hasOwn(methods, key)) {
+          warn(
+            ("Method \"" + key + "\" has already been defined as a data property."),
+            vm
+          );
+        }
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          "The data property \"" + key + "\" is already declared as a prop. " +
+          "Use prop default value instead.",
+          vm
+        );
+      } else if (!isReserved(key)) {
+        proxy(vm, "_data", key);
       }
     }
-    return -1;
+    // observe data
+    observe(data, true /* asRootData */);
   }
 
-  var checkbox = {
+  function getData (data, vm) {
+    // #7573 disable dep collection when invoking data getters
+    pushTarget();
+    try {
+      return data.call(vm, vm)
+    } catch (e) {
+      handleError(e, vm, "data()");
+      return {}
+    } finally {
+      popTarget();
+    }
+  }
 
-    bind: function bind() {
-      var self = this;
-      var el = this.el;
+  var computedWatcherOptions = { lazy: true };
 
-      this.getValue = function () {
-        return el.hasOwnProperty('_value') ? el._value : self.params.number ? toNumber(el.value) : el.value;
-      };
+  function initComputed (vm, computed) {
+    // $flow-disable-line
+    var watchers = vm._computedWatchers = Object.create(null);
+    // computed properties are just getters during SSR
+    var isSSR = isServerRendering();
 
-      function getBooleanValue() {
-        var val = el.checked;
-        if (val && el.hasOwnProperty('_trueValue')) {
-          return el._trueValue;
-        }
-        if (!val && el.hasOwnProperty('_falseValue')) {
-          return el._falseValue;
-        }
-        return val;
+    for (var key in computed) {
+      var userDef = computed[key];
+      var getter = typeof userDef === 'function' ? userDef : userDef.get;
+      if (getter == null) {
+        warn(
+          ("Getter is missing for computed property \"" + key + "\"."),
+          vm
+        );
       }
 
-      this.listener = function () {
-        var model = self._watcher.value;
-        if (isArray(model)) {
-          var val = self.getValue();
-          if (el.checked) {
-            if (indexOf(model, val) < 0) {
-              model.push(val);
-            }
-          } else {
-            model.$remove(val);
-          }
-        } else {
-          self.set(getBooleanValue());
-        }
-      };
-
-      this.on('change', this.listener);
-      if (el.hasAttribute('checked')) {
-        this.afterBind = this.listener;
+      if (!isSSR) {
+        // create internal watcher for the computed property.
+        watchers[key] = new Watcher(
+          vm,
+          getter || noop,
+          noop,
+          computedWatcherOptions
+        );
       }
-    },
 
-    update: function update(value) {
-      var el = this.el;
-      if (isArray(value)) {
-        el.checked = indexOf(value, this.getValue()) > -1;
+      // component-defined computed properties are already defined on the
+      // component prototype. We only need to define computed properties defined
+      // at instantiation here.
+      if (!(key in vm)) {
+        defineComputed(vm, key, userDef);
       } else {
-        if (el.hasOwnProperty('_trueValue')) {
-          el.checked = looseEqual(value, el._trueValue);
-        } else {
-          el.checked = !!value;
+        if (key in vm.$data) {
+          warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+        } else if (vm.$options.props && key in vm.$options.props) {
+          warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+        } else if (vm.$options.methods && key in vm.$options.methods) {
+          warn(("The computed property \"" + key + "\" is already defined as a method."), vm);
         }
       }
     }
-  };
-
-  var handlers = {
-    text: text$2,
-    radio: radio,
-    select: select,
-    checkbox: checkbox
-  };
-
-  var model = {
-
-    priority: MODEL,
-    twoWay: true,
-    handlers: handlers,
-    params: ['lazy', 'number', 'debounce'],
-
-    /**
-     * Possible elements:
-     *   <select>
-     *   <textarea>
-     *   <input type="*">
-     *     - text
-     *     - checkbox
-     *     - radio
-     *     - number
-     */
-
-    bind: function bind() {
-      // friendly warning...
-      this.checkFilters();
-      if (this.hasRead && !this.hasWrite) {
-        'development' !== 'production' && warn('It seems you are using a read-only filter with ' + 'v-model="' + this.descriptor.raw + '". ' + 'You might want to use a two-way filter to ensure correct behavior.', this.vm);
-      }
-      var el = this.el;
-      var tag = el.tagName;
-      var handler;
-      if (tag === 'INPUT') {
-        handler = handlers[el.type] || handlers.text;
-      } else if (tag === 'SELECT') {
-        handler = handlers.select;
-      } else if (tag === 'TEXTAREA') {
-        handler = handlers.text;
-      } else {
-        'development' !== 'production' && warn('v-model does not support element type: ' + tag, this.vm);
-        return;
-      }
-      el.__v_model = this;
-      handler.bind.call(this);
-      this.update = handler.update;
-      this._unbind = handler.unbind;
-    },
-
-    /**
-     * Check read/write filter stats.
-     */
-
-    checkFilters: function checkFilters() {
-      var filters = this.filters;
-      if (!filters) return;
-      var i = filters.length;
-      while (i--) {
-        var filter = resolveAsset(this.vm.$options, 'filters', filters[i].name);
-        if (typeof filter === 'function' || filter.read) {
-          this.hasRead = true;
-        }
-        if (filter.write) {
-          this.hasWrite = true;
-        }
-      }
-    },
-
-    unbind: function unbind() {
-      this.el.__v_model = null;
-      this._unbind && this._unbind();
-    }
-  };
-
-  // keyCode aliases
-  var keyCodes = {
-    esc: 27,
-    tab: 9,
-    enter: 13,
-    space: 32,
-    'delete': [8, 46],
-    up: 38,
-    left: 37,
-    right: 39,
-    down: 40
-  };
-
-  function keyFilter(handler, keys) {
-    var codes = keys.map(function (key) {
-      var charCode = key.charCodeAt(0);
-      if (charCode > 47 && charCode < 58) {
-        return parseInt(key, 10);
-      }
-      if (key.length === 1) {
-        charCode = key.toUpperCase().charCodeAt(0);
-        if (charCode > 64 && charCode < 91) {
-          return charCode;
-        }
-      }
-      return keyCodes[key];
-    });
-    codes = [].concat.apply([], codes);
-    return function keyHandler(e) {
-      if (codes.indexOf(e.keyCode) > -1) {
-        return handler.call(this, e);
-      }
-    };
   }
 
-  function stopFilter(handler) {
-    return function stopHandler(e) {
-      e.stopPropagation();
-      return handler.call(this, e);
-    };
-  }
-
-  function preventFilter(handler) {
-    return function preventHandler(e) {
-      e.preventDefault();
-      return handler.call(this, e);
-    };
-  }
-
-  function selfFilter(handler) {
-    return function selfHandler(e) {
-      if (e.target === e.currentTarget) {
-        return handler.call(this, e);
-      }
-    };
-  }
-
-  var on$1 = {
-
-    priority: ON,
-    acceptStatement: true,
-    keyCodes: keyCodes,
-
-    bind: function bind() {
-      // deal with iframes
-      if (this.el.tagName === 'IFRAME' && this.arg !== 'load') {
-        var self = this;
-        this.iframeBind = function () {
-          on(self.el.contentWindow, self.arg, self.handler, self.modifiers.capture);
-        };
-        this.on('load', this.iframeBind);
-      }
-    },
-
-    update: function update(handler) {
-      // stub a noop for v-on with no value,
-      // e.g. @mousedown.prevent
-      if (!this.descriptor.raw) {
-        handler = function () {};
-      }
-
-      if (typeof handler !== 'function') {
-        'development' !== 'production' && warn('v-on:' + this.arg + '="' + this.expression + '" expects a function value, ' + 'got ' + handler, this.vm);
-        return;
-      }
-
-      // apply modifiers
-      if (this.modifiers.stop) {
-        handler = stopFilter(handler);
-      }
-      if (this.modifiers.prevent) {
-        handler = preventFilter(handler);
-      }
-      if (this.modifiers.self) {
-        handler = selfFilter(handler);
-      }
-      // key filter
-      var keys = Object.keys(this.modifiers).filter(function (key) {
-        return key !== 'stop' && key !== 'prevent' && key !== 'self' && key !== 'capture';
-      });
-      if (keys.length) {
-        handler = keyFilter(handler, keys);
-      }
-
-      this.reset();
-      this.handler = handler;
-
-      if (this.iframeBind) {
-        this.iframeBind();
-      } else {
-        on(this.el, this.arg, this.handler, this.modifiers.capture);
-      }
-    },
-
-    reset: function reset() {
-      var el = this.iframeBind ? this.el.contentWindow : this.el;
-      if (this.handler) {
-        off(el, this.arg, this.handler);
-      }
-    },
-
-    unbind: function unbind() {
-      this.reset();
+  function defineComputed (
+    target,
+    key,
+    userDef
+  ) {
+    var shouldCache = !isServerRendering();
+    if (typeof userDef === 'function') {
+      sharedPropertyDefinition.get = shouldCache
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef);
+      sharedPropertyDefinition.set = noop;
+    } else {
+      sharedPropertyDefinition.get = userDef.get
+        ? shouldCache && userDef.cache !== false
+          ? createComputedGetter(key)
+          : createGetterInvoker(userDef.get)
+        : noop;
+      sharedPropertyDefinition.set = userDef.set || noop;
     }
-  };
-
-  var prefixes = ['-webkit-', '-moz-', '-ms-'];
-  var camelPrefixes = ['Webkit', 'Moz', 'ms'];
-  var importantRE = /!important;?$/;
-  var propCache = Object.create(null);
-
-  var testEl = null;
-
-  var style = {
-
-    deep: true,
-
-    update: function update(value) {
-      if (typeof value === 'string') {
-        this.el.style.cssText = value;
-      } else if (isArray(value)) {
-        this.handleObject(value.reduce(extend, {}));
-      } else {
-        this.handleObject(value || {});
-      }
-    },
-
-    handleObject: function handleObject(value) {
-      // cache object styles so that only changed props
-      // are actually updated.
-      var cache = this.cache || (this.cache = {});
-      var name, val;
-      for (name in cache) {
-        if (!(name in value)) {
-          this.handleSingle(name, null);
-          delete cache[name];
-        }
-      }
-      for (name in value) {
-        val = value[name];
-        if (val !== cache[name]) {
-          cache[name] = val;
-          this.handleSingle(name, val);
-        }
-      }
-    },
-
-    handleSingle: function handleSingle(prop, value) {
-      prop = normalize(prop);
-      if (!prop) return; // unsupported prop
-      // cast possible numbers/booleans into strings
-      if (value != null) value += '';
-      if (value) {
-        var isImportant = importantRE.test(value) ? 'important' : '';
-        if (isImportant) {
-          /* istanbul ignore if */
-          if ('development' !== 'production') {
-            warn('It\'s probably a bad idea to use !important with inline rules. ' + 'This feature will be deprecated in a future version of Vue.');
-          }
-          value = value.replace(importantRE, '').trim();
-          this.el.style.setProperty(prop.kebab, value, isImportant);
-        } else {
-          this.el.style[prop.camel] = value;
-        }
-      } else {
-        this.el.style[prop.camel] = '';
-      }
-    }
-
-  };
-
-  /**
-   * Normalize a CSS property name.
-   * - cache result
-   * - auto prefix
-   * - camelCase -> dash-case
-   *
-   * @param {String} prop
-   * @return {String}
-   */
-
-  function normalize(prop) {
-    if (propCache[prop]) {
-      return propCache[prop];
-    }
-    var res = prefix(prop);
-    propCache[prop] = propCache[res] = res;
-    return res;
-  }
-
-  /**
-   * Auto detect the appropriate prefix for a CSS property.
-   * https://gist.github.com/paulirish/523692
-   *
-   * @param {String} prop
-   * @return {String}
-   */
-
-  function prefix(prop) {
-    prop = hyphenate(prop);
-    var camel = camelize(prop);
-    var upper = camel.charAt(0).toUpperCase() + camel.slice(1);
-    if (!testEl) {
-      testEl = document.createElement('div');
-    }
-    var i = prefixes.length;
-    var prefixed;
-    if (camel !== 'filter' && camel in testEl.style) {
-      return {
-        kebab: prop,
-        camel: camel
+    if (sharedPropertyDefinition.set === noop) {
+      sharedPropertyDefinition.set = function () {
+        warn(
+          ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+          this
+        );
       };
     }
-    while (i--) {
-      prefixed = camelPrefixes[i] + upper;
-      if (prefixed in testEl.style) {
-        return {
-          kebab: prefixes[i] + prop,
-          camel: prefixed
-        };
-      }
-    }
+    Object.defineProperty(target, key, sharedPropertyDefinition);
   }
 
-  // xlink
-  var xlinkNS = 'http://www.w3.org/1999/xlink';
-  var xlinkRE = /^xlink:/;
-
-  // check for attributes that prohibit interpolations
-  var disallowedInterpAttrRE = /^v-|^:|^@|^(?:is|transition|transition-mode|debounce|track-by|stagger|enter-stagger|leave-stagger)$/;
-  // these attributes should also set their corresponding properties
-  // because they only affect the initial state of the element
-  var attrWithPropsRE = /^(?:value|checked|selected|muted)$/;
-  // these attributes expect enumrated values of "true" or "false"
-  // but are not boolean attributes
-  var enumeratedAttrRE = /^(?:draggable|contenteditable|spellcheck)$/;
-
-  // these attributes should set a hidden property for
-  // binding v-model to object values
-  var modelProps = {
-    value: '_value',
-    'true-value': '_trueValue',
-    'false-value': '_falseValue'
-  };
-
-  var bind$1 = {
-
-    priority: BIND,
-
-    bind: function bind() {
-      var attr = this.arg;
-      var tag = this.el.tagName;
-      // should be deep watch on object mode
-      if (!attr) {
-        this.deep = true;
-      }
-      // handle interpolation bindings
-      var descriptor = this.descriptor;
-      var tokens = descriptor.interp;
-      if (tokens) {
-        // handle interpolations with one-time tokens
-        if (descriptor.hasOneTime) {
-          this.expression = tokensToExp(tokens, this._scope || this.vm);
-        }
-
-        // only allow binding on native attributes
-        if (disallowedInterpAttrRE.test(attr) || attr === 'name' && (tag === 'PARTIAL' || tag === 'SLOT')) {
-          'development' !== 'production' && warn(attr + '="' + descriptor.raw + '": ' + 'attribute interpolation is not allowed in Vue.js ' + 'directives and special attributes.', this.vm);
-          this.el.removeAttribute(attr);
-          this.invalid = true;
-        }
-
-        /* istanbul ignore if */
-        if ('development' !== 'production') {
-          var raw = attr + '="' + descriptor.raw + '": ';
-          // warn src
-          if (attr === 'src') {
-            warn(raw + 'interpolation in "src" attribute will cause ' + 'a 404 request. Use v-bind:src instead.', this.vm);
-          }
-
-          // warn style
-          if (attr === 'style') {
-            warn(raw + 'interpolation in "style" attribute will cause ' + 'the attribute to be discarded in Internet Explorer. ' + 'Use v-bind:style instead.', this.vm);
-          }
-        }
-      }
-    },
-
-    update: function update(value) {
-      if (this.invalid) {
-        return;
-      }
-      var attr = this.arg;
-      if (this.arg) {
-        this.handleSingle(attr, value);
-      } else {
-        this.handleObject(value || {});
-      }
-    },
-
-    // share object handler with v-bind:class
-    handleObject: style.handleObject,
-
-    handleSingle: function handleSingle(attr, value) {
-      var el = this.el;
-      var interp = this.descriptor.interp;
-      if (this.modifiers.camel) {
-        attr = camelize(attr);
-      }
-      if (!interp && attrWithPropsRE.test(attr) && attr in el) {
-        var attrValue = attr === 'value' ? value == null // IE9 will set input.value to "null" for null...
-        ? '' : value : value;
-
-        if (el[attr] !== attrValue) {
-          el[attr] = attrValue;
-        }
-      }
-      // set model props
-      var modelProp = modelProps[attr];
-      if (!interp && modelProp) {
-        el[modelProp] = value;
-        // update v-model if present
-        var model = el.__v_model;
-        if (model) {
-          model.listener();
-        }
-      }
-      // do not set value attribute for textarea
-      if (attr === 'value' && el.tagName === 'TEXTAREA') {
-        el.removeAttribute(attr);
-        return;
-      }
-      // update attribute
-      if (enumeratedAttrRE.test(attr)) {
-        el.setAttribute(attr, value ? 'true' : 'false');
-      } else if (value != null && value !== false) {
-        if (attr === 'class') {
-          // handle edge case #1960:
-          // class interpolation should not overwrite Vue transition class
-          if (el.__v_trans) {
-            value += ' ' + el.__v_trans.id + '-transition';
-          }
-          setClass(el, value);
-        } else if (xlinkRE.test(attr)) {
-          el.setAttributeNS(xlinkNS, attr, value === true ? '' : value);
-        } else {
-          el.setAttribute(attr, value === true ? '' : value);
-        }
-      } else {
-        el.removeAttribute(attr);
-      }
-    }
-  };
-
-  var el = {
-
-    priority: EL,
-
-    bind: function bind() {
-      /* istanbul ignore if */
-      if (!this.arg) {
-        return;
-      }
-      var id = this.id = camelize(this.arg);
-      var refs = (this._scope || this.vm).$els;
-      if (hasOwn(refs, id)) {
-        refs[id] = this.el;
-      } else {
-        defineReactive(refs, id, this.el);
-      }
-    },
-
-    unbind: function unbind() {
-      var refs = (this._scope || this.vm).$els;
-      if (refs[this.id] === this.el) {
-        refs[this.id] = null;
-      }
-    }
-  };
-
-  var ref = {
-    bind: function bind() {
-      'development' !== 'production' && warn('v-ref:' + this.arg + ' must be used on a child ' + 'component. Found on <' + this.el.tagName.toLowerCase() + '>.', this.vm);
-    }
-  };
-
-  var cloak = {
-    bind: function bind() {
-      var el = this.el;
-      this.vm.$once('pre-hook:compiled', function () {
-        el.removeAttribute('v-cloak');
-      });
-    }
-  };
-
-  // must export plain object
-  var directives = {
-    text: text$1,
-    html: html,
-    'for': vFor,
-    'if': vIf,
-    show: show,
-    model: model,
-    on: on$1,
-    bind: bind$1,
-    el: el,
-    ref: ref,
-    cloak: cloak
-  };
-
-  var vClass = {
-
-    deep: true,
-
-    update: function update(value) {
-      if (!value) {
-        this.cleanup();
-      } else if (typeof value === 'string') {
-        this.setClass(value.trim().split(/\s+/));
-      } else {
-        this.setClass(normalize$1(value));
-      }
-    },
-
-    setClass: function setClass(value) {
-      this.cleanup(value);
-      for (var i = 0, l = value.length; i < l; i++) {
-        var val = value[i];
-        if (val) {
-          apply(this.el, val, addClass);
-        }
-      }
-      this.prevKeys = value;
-    },
-
-    cleanup: function cleanup(value) {
-      var prevKeys = this.prevKeys;
-      if (!prevKeys) return;
-      var i = prevKeys.length;
-      while (i--) {
-        var key = prevKeys[i];
-        if (!value || value.indexOf(key) < 0) {
-          apply(this.el, key, removeClass);
-        }
-      }
-    }
-  };
-
-  /**
-   * Normalize objects and arrays (potentially containing objects)
-   * into array of strings.
-   *
-   * @param {Object|Array<String|Object>} value
-   * @return {Array<String>}
-   */
-
-  function normalize$1(value) {
-    var res = [];
-    if (isArray(value)) {
-      for (var i = 0, l = value.length; i < l; i++) {
-        var _key = value[i];
-        if (_key) {
-          if (typeof _key === 'string') {
-            res.push(_key);
-          } else {
-            for (var k in _key) {
-              if (_key[k]) res.push(k);
-            }
-          }
-        }
-      }
-    } else if (isObject(value)) {
-      for (var key in value) {
-        if (value[key]) res.push(key);
-      }
-    }
-    return res;
-  }
-
-  /**
-   * Add or remove a class/classes on an element
-   *
-   * @param {Element} el
-   * @param {String} key The class name. This may or may not
-   *                     contain a space character, in such a
-   *                     case we'll deal with multiple class
-   *                     names at once.
-   * @param {Function} fn
-   */
-
-  function apply(el, key, fn) {
-    key = key.trim();
-    if (key.indexOf(' ') === -1) {
-      fn(el, key);
-      return;
-    }
-    // The key contains one or more space characters.
-    // Since a class name doesn't accept such characters, we
-    // treat it as multiple classes.
-    var keys = key.split(/\s+/);
-    for (var i = 0, l = keys.length; i < l; i++) {
-      fn(el, keys[i]);
-    }
-  }
-
-  var component = {
-
-    priority: COMPONENT,
-
-    params: ['keep-alive', 'transition-mode', 'inline-template'],
-
-    /**
-     * Setup. Two possible usages:
-     *
-     * - static:
-     *   <comp> or <div v-component="comp">
-     *
-     * - dynamic:
-     *   <component :is="view">
-     */
-
-    bind: function bind() {
-      if (!this.el.__vue__) {
-        // keep-alive cache
-        this.keepAlive = this.params.keepAlive;
-        if (this.keepAlive) {
-          this.cache = {};
-        }
-        // check inline-template
-        if (this.params.inlineTemplate) {
-          // extract inline template as a DocumentFragment
-          this.inlineTemplate = extractContent(this.el, true);
-        }
-        // component resolution related state
-        this.pendingComponentCb = this.Component = null;
-        // transition related state
-        this.pendingRemovals = 0;
-        this.pendingRemovalCb = null;
-        // create a ref anchor
-        this.anchor = createAnchor('v-component');
-        replace(this.el, this.anchor);
-        // remove is attribute.
-        // this is removed during compilation, but because compilation is
-        // cached, when the component is used elsewhere this attribute
-        // will remain at link time.
-        this.el.removeAttribute('is');
-        this.el.removeAttribute(':is');
-        // remove ref, same as above
-        if (this.descriptor.ref) {
-          this.el.removeAttribute('v-ref:' + hyphenate(this.descriptor.ref));
-        }
-        // if static, build right now.
-        if (this.literal) {
-          this.setComponent(this.expression);
-        }
-      } else {
-        'development' !== 'production' && warn('cannot mount component "' + this.expression + '" ' + 'on already mounted element: ' + this.el);
-      }
-    },
-
-    /**
-     * Public update, called by the watcher in the dynamic
-     * literal scenario, e.g. <component :is="view">
-     */
-
-    update: function update(value) {
-      if (!this.literal) {
-        this.setComponent(value);
-      }
-    },
-
-    /**
-     * Switch dynamic components. May resolve the component
-     * asynchronously, and perform transition based on
-     * specified transition mode. Accepts a few additional
-     * arguments specifically for vue-router.
-     *
-     * The callback is called when the full transition is
-     * finished.
-     *
-     * @param {String} value
-     * @param {Function} [cb]
-     */
-
-    setComponent: function setComponent(value, cb) {
-      this.invalidatePending();
-      if (!value) {
-        // just remove current
-        this.unbuild(true);
-        this.remove(this.childVM, cb);
-        this.childVM = null;
-      } else {
-        var self = this;
-        this.resolveComponent(value, function () {
-          self.mountComponent(cb);
-        });
-      }
-    },
-
-    /**
-     * Resolve the component constructor to use when creating
-     * the child vm.
-     *
-     * @param {String|Function} value
-     * @param {Function} cb
-     */
-
-    resolveComponent: function resolveComponent(value, cb) {
-      var self = this;
-      this.pendingComponentCb = cancellable(function (Component) {
-        self.ComponentName = Component.options.name || (typeof value === 'string' ? value : null);
-        self.Component = Component;
-        cb();
-      });
-      this.vm._resolveComponent(value, this.pendingComponentCb);
-    },
-
-    /**
-     * Create a new instance using the current constructor and
-     * replace the existing instance. This method doesn't care
-     * whether the new component and the old one are actually
-     * the same.
-     *
-     * @param {Function} [cb]
-     */
-
-    mountComponent: function mountComponent(cb) {
-      // actual mount
-      this.unbuild(true);
-      var self = this;
-      var activateHooks = this.Component.options.activate;
-      var cached = this.getCached();
-      var newComponent = this.build();
-      if (activateHooks && !cached) {
-        this.waitingFor = newComponent;
-        callActivateHooks(activateHooks, newComponent, function () {
-          if (self.waitingFor !== newComponent) {
-            return;
-          }
-          self.waitingFor = null;
-          self.transition(newComponent, cb);
-        });
-      } else {
-        // update ref for kept-alive component
-        if (cached) {
-          newComponent._updateRef();
-        }
-        this.transition(newComponent, cb);
-      }
-    },
-
-    /**
-     * When the component changes or unbinds before an async
-     * constructor is resolved, we need to invalidate its
-     * pending callback.
-     */
-
-    invalidatePending: function invalidatePending() {
-      if (this.pendingComponentCb) {
-        this.pendingComponentCb.cancel();
-        this.pendingComponentCb = null;
-      }
-    },
-
-    /**
-     * Instantiate/insert a new child vm.
-     * If keep alive and has cached instance, insert that
-     * instance; otherwise build a new one and cache it.
-     *
-     * @param {Object} [extraOptions]
-     * @return {Vue} - the created instance
-     */
-
-    build: function build(extraOptions) {
-      var cached = this.getCached();
-      if (cached) {
-        return cached;
-      }
-      if (this.Component) {
-        // default options
-        var options = {
-          name: this.ComponentName,
-          el: cloneNode(this.el),
-          template: this.inlineTemplate,
-          // make sure to add the child with correct parent
-          // if this is a transcluded component, its parent
-          // should be the transclusion host.
-          parent: this._host || this.vm,
-          // if no inline-template, then the compiled
-          // linker can be cached for better performance.
-          _linkerCachable: !this.inlineTemplate,
-          _ref: this.descriptor.ref,
-          _asComponent: true,
-          _isRouterView: this._isRouterView,
-          // if this is a transcluded component, context
-          // will be the common parent vm of this instance
-          // and its host.
-          _context: this.vm,
-          // if this is inside an inline v-for, the scope
-          // will be the intermediate scope created for this
-          // repeat fragment. this is used for linking props
-          // and container directives.
-          _scope: this._scope,
-          // pass in the owner fragment of this component.
-          // this is necessary so that the fragment can keep
-          // track of its contained components in order to
-          // call attach/detach hooks for them.
-          _frag: this._frag
-        };
-        // extra options
-        // in 1.0.0 this is used by vue-router only
-        /* istanbul ignore if */
-        if (extraOptions) {
-          extend(options, extraOptions);
-        }
-        var child = new this.Component(options);
-        if (this.keepAlive) {
-          this.cache[this.Component.cid] = child;
-        }
-        /* istanbul ignore if */
-        if ('development' !== 'production' && this.el.hasAttribute('transition') && child._isFragment) {
-          warn('Transitions will not work on a fragment instance. ' + 'Template: ' + child.$options.template, child);
-        }
-        return child;
-      }
-    },
-
-    /**
-     * Try to get a cached instance of the current component.
-     *
-     * @return {Vue|undefined}
-     */
-
-    getCached: function getCached() {
-      return this.keepAlive && this.cache[this.Component.cid];
-    },
-
-    /**
-     * Teardown the current child, but defers cleanup so
-     * that we can separate the destroy and removal steps.
-     *
-     * @param {Boolean} defer
-     */
-
-    unbuild: function unbuild(defer) {
-      if (this.waitingFor) {
-        if (!this.keepAlive) {
-          this.waitingFor.$destroy();
-        }
-        this.waitingFor = null;
-      }
-      var child = this.childVM;
-      if (!child || this.keepAlive) {
-        if (child) {
-          // remove ref
-          child._inactive = true;
-          child._updateRef(true);
-        }
-        return;
-      }
-      // the sole purpose of `deferCleanup` is so that we can
-      // "deactivate" the vm right now and perform DOM removal
-      // later.
-      child.$destroy(false, defer);
-    },
-
-    /**
-     * Remove current destroyed child and manually do
-     * the cleanup after removal.
-     *
-     * @param {Function} cb
-     */
-
-    remove: function remove(child, cb) {
-      var keepAlive = this.keepAlive;
-      if (child) {
-        // we may have a component switch when a previous
-        // component is still being transitioned out.
-        // we want to trigger only one lastest insertion cb
-        // when the existing transition finishes. (#1119)
-        this.pendingRemovals++;
-        this.pendingRemovalCb = cb;
-        var self = this;
-        child.$remove(function () {
-          self.pendingRemovals--;
-          if (!keepAlive) child._cleanup();
-          if (!self.pendingRemovals && self.pendingRemovalCb) {
-            self.pendingRemovalCb();
-            self.pendingRemovalCb = null;
-          }
-        });
-      } else if (cb) {
-        cb();
-      }
-    },
-
-    /**
-     * Actually swap the components, depending on the
-     * transition mode. Defaults to simultaneous.
-     *
-     * @param {Vue} target
-     * @param {Function} [cb]
-     */
-
-    transition: function transition(target, cb) {
-      var self = this;
-      var current = this.childVM;
-      // for devtool inspection
-      if (current) current._inactive = true;
-      target._inactive = false;
-      this.childVM = target;
-      switch (self.params.transitionMode) {
-        case 'in-out':
-          target.$before(self.anchor, function () {
-            self.remove(current, cb);
-          });
-          break;
-        case 'out-in':
-          self.remove(current, function () {
-            target.$before(self.anchor, cb);
-          });
-          break;
-        default:
-          self.remove(current);
-          target.$before(self.anchor, cb);
-      }
-    },
-
-    /**
-     * Unbind.
-     */
-
-    unbind: function unbind() {
-      this.invalidatePending();
-      // Do not defer cleanup when unbinding
-      this.unbuild();
-      // destroy all keep-alive cached instances
-      if (this.cache) {
-        for (var key in this.cache) {
-          this.cache[key].$destroy();
-        }
-        this.cache = null;
-      }
-    }
-  };
-
-  /**
-   * Call activate hooks in order (asynchronous)
-   *
-   * @param {Array} hooks
-   * @param {Vue} vm
-   * @param {Function} cb
-   */
-
-  function callActivateHooks(hooks, vm, cb) {
-    var total = hooks.length;
-    var called = 0;
-    hooks[0].call(vm, next);
-    function next() {
-      if (++called >= total) {
-        cb();
-      } else {
-        hooks[called].call(vm, next);
-      }
-    }
-  }
-
-  var propBindingModes = config._propBindingModes;
-  var empty = {};
-
-  // regexes
-  var identRE$1 = /^[$_a-zA-Z]+[\w$]*$/;
-  var settablePathRE = /^[A-Za-z_$][\w$]*(\.[A-Za-z_$][\w$]*|\[[^\[\]]+\])*$/;
-
-  /**
-   * Compile props on a root element and return
-   * a props link function.
-   *
-   * @param {Element|DocumentFragment} el
-   * @param {Array} propOptions
-   * @param {Vue} vm
-   * @return {Function} propsLinkFn
-   */
-
-  function compileProps(el, propOptions, vm) {
-    var props = [];
-    var names = Object.keys(propOptions);
-    var i = names.length;
-    var options, name, attr, value, path, parsed, prop;
-    while (i--) {
-      name = names[i];
-      options = propOptions[name] || empty;
-
-      if ('development' !== 'production' && name === '$data') {
-        warn('Do not use $data as prop.', vm);
-        continue;
-      }
-
-      // props could contain dashes, which will be
-      // interpreted as minus calculations by the parser
-      // so we need to camelize the path here
-      path = camelize(name);
-      if (!identRE$1.test(path)) {
-        'development' !== 'production' && warn('Invalid prop key: "' + name + '". Prop keys ' + 'must be valid identifiers.', vm);
-        continue;
-      }
-
-      prop = {
-        name: name,
-        path: path,
-        options: options,
-        mode: propBindingModes.ONE_WAY,
-        raw: null
-      };
-
-      attr = hyphenate(name);
-      // first check dynamic version
-      if ((value = getBindAttr(el, attr)) === null) {
-        if ((value = getBindAttr(el, attr + '.sync')) !== null) {
-          prop.mode = propBindingModes.TWO_WAY;
-        } else if ((value = getBindAttr(el, attr + '.once')) !== null) {
-          prop.mode = propBindingModes.ONE_TIME;
-        }
-      }
-      if (value !== null) {
-        // has dynamic binding!
-        prop.raw = value;
-        parsed = parseDirective(value);
-        value = parsed.expression;
-        prop.filters = parsed.filters;
-        // check binding type
-        if (isLiteral(value) && !parsed.filters) {
-          // for expressions containing literal numbers and
-          // booleans, there's no need to setup a prop binding,
-          // so we can optimize them as a one-time set.
-          prop.optimizedLiteral = true;
-        } else {
-          prop.dynamic = true;
-          // check non-settable path for two-way bindings
-          if ('development' !== 'production' && prop.mode === propBindingModes.TWO_WAY && !settablePathRE.test(value)) {
-            prop.mode = propBindingModes.ONE_WAY;
-            warn('Cannot bind two-way prop with non-settable ' + 'parent path: ' + value, vm);
-          }
-        }
-        prop.parentPath = value;
-
-        // warn required two-way
-        if ('development' !== 'production' && options.twoWay && prop.mode !== propBindingModes.TWO_WAY) {
-          warn('Prop "' + name + '" expects a two-way binding type.', vm);
-        }
-      } else if ((value = getAttr(el, attr)) !== null) {
-        // has literal binding!
-        prop.raw = value;
-      } else if ('development' !== 'production') {
-        // check possible camelCase prop usage
-        var lowerCaseName = path.toLowerCase();
-        value = /[A-Z\-]/.test(name) && (el.getAttribute(lowerCaseName) || el.getAttribute(':' + lowerCaseName) || el.getAttribute('v-bind:' + lowerCaseName) || el.getAttribute(':' + lowerCaseName + '.once') || el.getAttribute('v-bind:' + lowerCaseName + '.once') || el.getAttribute(':' + lowerCaseName + '.sync') || el.getAttribute('v-bind:' + lowerCaseName + '.sync'));
-        if (value) {
-          warn('Possible usage error for prop `' + lowerCaseName + '` - ' + 'did you mean `' + attr + '`? HTML is case-insensitive, remember to use ' + 'kebab-case for props in templates.', vm);
-        } else if (options.required) {
-          // warn missing required
-          warn('Missing required prop: ' + name, vm);
-        }
-      }
-      // push prop
-      props.push(prop);
-    }
-    return makePropsLinkFn(props);
-  }
-
-  /**
-   * Build a function that applies props to a vm.
-   *
-   * @param {Array} props
-   * @return {Function} propsLinkFn
-   */
-
-  function makePropsLinkFn(props) {
-    return function propsLinkFn(vm, scope) {
-      // store resolved props info
-      vm._props = {};
-      var inlineProps = vm.$options.propsData;
-      var i = props.length;
-      var prop, path, options, value, raw;
-      while (i--) {
-        prop = props[i];
-        raw = prop.raw;
-        path = prop.path;
-        options = prop.options;
-        vm._props[path] = prop;
-        if (inlineProps && hasOwn(inlineProps, path)) {
-          initProp(vm, prop, inlineProps[path]);
-        }if (raw === null) {
-          // initialize absent prop
-          initProp(vm, prop, undefined);
-        } else if (prop.dynamic) {
-          // dynamic prop
-          if (prop.mode === propBindingModes.ONE_TIME) {
-            // one time binding
-            value = (scope || vm._context || vm).$get(prop.parentPath);
-            initProp(vm, prop, value);
-          } else {
-            if (vm._context) {
-              // dynamic binding
-              vm._bindDir({
-                name: 'prop',
-                def: propDef,
-                prop: prop
-              }, null, null, scope); // el, host, scope
-            } else {
-                // root instance
-                initProp(vm, prop, vm.$get(prop.parentPath));
-              }
-          }
-        } else if (prop.optimizedLiteral) {
-          // optimized literal, cast it and just set once
-          var stripped = stripQuotes(raw);
-          value = stripped === raw ? toBoolean(toNumber(raw)) : stripped;
-          initProp(vm, prop, value);
-        } else {
-          // string literal, but we need to cater for
-          // Boolean props with no value, or with same
-          // literal value (e.g. disabled="disabled")
-          // see https://github.com/vuejs/vue-loader/issues/182
-          value = options.type === Boolean && (raw === '' || raw === hyphenate(prop.name)) ? true : raw;
-          initProp(vm, prop, value);
-        }
-      }
-    };
-  }
-
-  /**
-   * Process a prop with a rawValue, applying necessary coersions,
-   * default values & assertions and call the given callback with
-   * processed value.
-   *
-   * @param {Vue} vm
-   * @param {Object} prop
-   * @param {*} rawValue
-   * @param {Function} fn
-   */
-
-  function processPropValue(vm, prop, rawValue, fn) {
-    var isSimple = prop.dynamic && isSimplePath(prop.parentPath);
-    var value = rawValue;
-    if (value === undefined) {
-      value = getPropDefaultValue(vm, prop);
-    }
-    value = coerceProp(prop, value, vm);
-    var coerced = value !== rawValue;
-    if (!assertProp(prop, value, vm)) {
-      value = undefined;
-    }
-    if (isSimple && !coerced) {
-      withoutConversion(function () {
-        fn(value);
-      });
-    } else {
-      fn(value);
-    }
-  }
-
-  /**
-   * Set a prop's initial value on a vm and its data object.
-   *
-   * @param {Vue} vm
-   * @param {Object} prop
-   * @param {*} value
-   */
-
-  function initProp(vm, prop, value) {
-    processPropValue(vm, prop, value, function (value) {
-      defineReactive(vm, prop.path, value);
-    });
-  }
-
-  /**
-   * Update a prop's value on a vm.
-   *
-   * @param {Vue} vm
-   * @param {Object} prop
-   * @param {*} value
-   */
-
-  function updateProp(vm, prop, value) {
-    processPropValue(vm, prop, value, function (value) {
-      vm[prop.path] = value;
-    });
-  }
-
-  /**
-   * Get the default value of a prop.
-   *
-   * @param {Vue} vm
-   * @param {Object} prop
-   * @return {*}
-   */
-
-  function getPropDefaultValue(vm, prop) {
-    // no default, return undefined
-    var options = prop.options;
-    if (!hasOwn(options, 'default')) {
-      // absent boolean value defaults to false
-      return options.type === Boolean ? false : undefined;
-    }
-    var def = options['default'];
-    // warn against non-factory defaults for Object & Array
-    if (isObject(def)) {
-      'development' !== 'production' && warn('Invalid default value for prop "' + prop.name + '": ' + 'Props with type Object/Array must use a factory function ' + 'to return the default value.', vm);
-    }
-    // call factory function for non-Function types
-    return typeof def === 'function' && options.type !== Function ? def.call(vm) : def;
-  }
-
-  /**
-   * Assert whether a prop is valid.
-   *
-   * @param {Object} prop
-   * @param {*} value
-   * @param {Vue} vm
-   */
-
-  function assertProp(prop, value, vm) {
-    if (!prop.options.required && ( // non-required
-    prop.raw === null || // abscent
-    value == null) // null or undefined
-    ) {
-        return true;
-      }
-    var options = prop.options;
-    var type = options.type;
-    var valid = !type;
-    var expectedTypes = [];
-    if (type) {
-      if (!isArray(type)) {
-        type = [type];
-      }
-      for (var i = 0; i < type.length && !valid; i++) {
-        var assertedType = assertType(value, type[i]);
-        expectedTypes.push(assertedType.expectedType);
-        valid = assertedType.valid;
-      }
-    }
-    if (!valid) {
-      if ('development' !== 'production') {
-        warn('Invalid prop: type check failed for prop "' + prop.name + '".' + ' Expected ' + expectedTypes.map(formatType).join(', ') + ', got ' + formatValue(value) + '.', vm);
-      }
-      return false;
-    }
-    var validator = options.validator;
-    if (validator) {
-      if (!validator(value)) {
-        'development' !== 'production' && warn('Invalid prop: custom validator check failed for prop "' + prop.name + '".', vm);
-        return false;
-      }
-    }
-    return true;
-  }
-
-  /**
-   * Force parsing value with coerce option.
-   *
-   * @param {*} value
-   * @param {Object} options
-   * @return {*}
-   */
-
-  function coerceProp(prop, value, vm) {
-    var coerce = prop.options.coerce;
-    if (!coerce) {
-      return value;
-    }
-    if (typeof coerce === 'function') {
-      return coerce(value);
-    } else {
-      'development' !== 'production' && warn('Invalid coerce for prop "' + prop.name + '": expected function, got ' + typeof coerce + '.', vm);
-      return value;
-    }
-  }
-
-  /**
-   * Assert the type of a value
-   *
-   * @param {*} value
-   * @param {Function} type
-   * @return {Object}
-   */
-
-  function assertType(value, type) {
-    var valid;
-    var expectedType;
-    if (type === String) {
-      expectedType = 'string';
-      valid = typeof value === expectedType;
-    } else if (type === Number) {
-      expectedType = 'number';
-      valid = typeof value === expectedType;
-    } else if (type === Boolean) {
-      expectedType = 'boolean';
-      valid = typeof value === expectedType;
-    } else if (type === Function) {
-      expectedType = 'function';
-      valid = typeof value === expectedType;
-    } else if (type === Object) {
-      expectedType = 'object';
-      valid = isPlainObject(value);
-    } else if (type === Array) {
-      expectedType = 'array';
-      valid = isArray(value);
-    } else {
-      valid = value instanceof type;
-    }
-    return {
-      valid: valid,
-      expectedType: expectedType
-    };
-  }
-
-  /**
-   * Format type for output
-   *
-   * @param {String} type
-   * @return {String}
-   */
-
-  function formatType(type) {
-    return type ? type.charAt(0).toUpperCase() + type.slice(1) : 'custom type';
-  }
-
-  /**
-   * Format value
-   *
-   * @param {*} value
-   * @return {String}
-   */
-
-  function formatValue(val) {
-    return Object.prototype.toString.call(val).slice(8, -1);
-  }
-
-  var bindingModes = config._propBindingModes;
-
-  var propDef = {
-
-    bind: function bind() {
-      var child = this.vm;
-      var parent = child._context;
-      // passed in from compiler directly
-      var prop = this.descriptor.prop;
-      var childKey = prop.path;
-      var parentKey = prop.parentPath;
-      var twoWay = prop.mode === bindingModes.TWO_WAY;
-
-      var parentWatcher = this.parentWatcher = new Watcher(parent, parentKey, function (val) {
-        updateProp(child, prop, val);
-      }, {
-        twoWay: twoWay,
-        filters: prop.filters,
-        // important: props need to be observed on the
-        // v-for scope if present
-        scope: this._scope
-      });
-
-      // set the child initial value.
-      initProp(child, prop, parentWatcher.value);
-
-      // setup two-way binding
-      if (twoWay) {
-        // important: defer the child watcher creation until
-        // the created hook (after data observation)
-        var self = this;
-        child.$once('pre-hook:created', function () {
-          self.childWatcher = new Watcher(child, childKey, function (val) {
-            parentWatcher.set(val);
-          }, {
-            // ensure sync upward before parent sync down.
-            // this is necessary in cases e.g. the child
-            // mutates a prop array, then replaces it. (#1683)
-            sync: true
-          });
-        });
-      }
-    },
-
-    unbind: function unbind() {
-      this.parentWatcher.teardown();
-      if (this.childWatcher) {
-        this.childWatcher.teardown();
-      }
-    }
-  };
-
-  var queue$1 = [];
-  var queued = false;
-
-  /**
-   * Push a job into the queue.
-   *
-   * @param {Function} job
-   */
-
-  function pushJob(job) {
-    queue$1.push(job);
-    if (!queued) {
-      queued = true;
-      nextTick(flush);
-    }
-  }
-
-  /**
-   * Flush the queue, and do one forced reflow before
-   * triggering transitions.
-   */
-
-  function flush() {
-    // Force layout
-    var f = document.documentElement.offsetHeight;
-    for (var i = 0; i < queue$1.length; i++) {
-      queue$1[i]();
-    }
-    queue$1 = [];
-    queued = false;
-    // dummy return, so js linters don't complain about
-    // unused variable f
-    return f;
-  }
-
-  var TYPE_TRANSITION = 'transition';
-  var TYPE_ANIMATION = 'animation';
-  var transDurationProp = transitionProp + 'Duration';
-  var animDurationProp = animationProp + 'Duration';
-
-  /**
-   * If a just-entered element is applied the
-   * leave class while its enter transition hasn't started yet,
-   * and the transitioned property has the same value for both
-   * enter/leave, then the leave transition will be skipped and
-   * the transitionend event never fires. This function ensures
-   * its callback to be called after a transition has started
-   * by waiting for double raf.
-   *
-   * It falls back to setTimeout on devices that support CSS
-   * transitions but not raf (e.g. Android 4.2 browser) - since
-   * these environments are usually slow, we are giving it a
-   * relatively large timeout.
-   */
-
-  var raf = inBrowser && window.requestAnimationFrame;
-  var waitForTransitionStart = raf
-  /* istanbul ignore next */
-  ? function (fn) {
-    raf(function () {
-      raf(fn);
-    });
-  } : function (fn) {
-    setTimeout(fn, 50);
-  };
-
-  /**
-   * A Transition object that encapsulates the state and logic
-   * of the transition.
-   *
-   * @param {Element} el
-   * @param {String} id
-   * @param {Object} hooks
-   * @param {Vue} vm
-   */
-  function Transition(el, id, hooks, vm) {
-    this.id = id;
-    this.el = el;
-    this.enterClass = hooks && hooks.enterClass || id + '-enter';
-    this.leaveClass = hooks && hooks.leaveClass || id + '-leave';
-    this.hooks = hooks;
-    this.vm = vm;
-    // async state
-    this.pendingCssEvent = this.pendingCssCb = this.cancel = this.pendingJsCb = this.op = this.cb = null;
-    this.justEntered = false;
-    this.entered = this.left = false;
-    this.typeCache = {};
-    // check css transition type
-    this.type = hooks && hooks.type;
-    /* istanbul ignore if */
-    if ('development' !== 'production') {
-      if (this.type && this.type !== TYPE_TRANSITION && this.type !== TYPE_ANIMATION) {
-        warn('invalid CSS transition type for transition="' + this.id + '": ' + this.type, vm);
-      }
-    }
-    // bind
-    var self = this;['enterNextTick', 'enterDone', 'leaveNextTick', 'leaveDone'].forEach(function (m) {
-      self[m] = bind(self[m], self);
-    });
-  }
-
-  var p$1 = Transition.prototype;
-
-  /**
-   * Start an entering transition.
-   *
-   * 1. enter transition triggered
-   * 2. call beforeEnter hook
-   * 3. add enter class
-   * 4. insert/show element
-   * 5. call enter hook (with possible explicit js callback)
-   * 6. reflow
-   * 7. based on transition type:
-   *    - transition:
-   *        remove class now, wait for transitionend,
-   *        then done if there's no explicit js callback.
-   *    - animation:
-   *        wait for animationend, remove class,
-   *        then done if there's no explicit js callback.
-   *    - no css transition:
-   *        done now if there's no explicit js callback.
-   * 8. wait for either done or js callback, then call
-   *    afterEnter hook.
-   *
-   * @param {Function} op - insert/show the element
-   * @param {Function} [cb]
-   */
-
-  p$1.enter = function (op, cb) {
-    this.cancelPending();
-    this.callHook('beforeEnter');
-    this.cb = cb;
-    addClass(this.el, this.enterClass);
-    op();
-    this.entered = false;
-    this.callHookWithCb('enter');
-    if (this.entered) {
-      return; // user called done synchronously.
-    }
-    this.cancel = this.hooks && this.hooks.enterCancelled;
-    pushJob(this.enterNextTick);
-  };
-
-  /**
-   * The "nextTick" phase of an entering transition, which is
-   * to be pushed into a queue and executed after a reflow so
-   * that removing the class can trigger a CSS transition.
-   */
-
-  p$1.enterNextTick = function () {
-    var _this = this;
-
-    // prevent transition skipping
-    this.justEntered = true;
-    waitForTransitionStart(function () {
-      _this.justEntered = false;
-    });
-    var enterDone = this.enterDone;
-    var type = this.getCssTransitionType(this.enterClass);
-    if (!this.pendingJsCb) {
-      if (type === TYPE_TRANSITION) {
-        // trigger transition by removing enter class now
-        removeClass(this.el, this.enterClass);
-        this.setupCssCb(transitionEndEvent, enterDone);
-      } else if (type === TYPE_ANIMATION) {
-        this.setupCssCb(animationEndEvent, enterDone);
-      } else {
-        enterDone();
-      }
-    } else if (type === TYPE_TRANSITION) {
-      removeClass(this.el, this.enterClass);
-    }
-  };
-
-  /**
-   * The "cleanup" phase of an entering transition.
-   */
-
-  p$1.enterDone = function () {
-    this.entered = true;
-    this.cancel = this.pendingJsCb = null;
-    removeClass(this.el, this.enterClass);
-    this.callHook('afterEnter');
-    if (this.cb) this.cb();
-  };
-
-  /**
-   * Start a leaving transition.
-   *
-   * 1. leave transition triggered.
-   * 2. call beforeLeave hook
-   * 3. add leave class (trigger css transition)
-   * 4. call leave hook (with possible explicit js callback)
-   * 5. reflow if no explicit js callback is provided
-   * 6. based on transition type:
-   *    - transition or animation:
-   *        wait for end event, remove class, then done if
-   *        there's no explicit js callback.
-   *    - no css transition:
-   *        done if there's no explicit js callback.
-   * 7. wait for either done or js callback, then call
-   *    afterLeave hook.
-   *
-   * @param {Function} op - remove/hide the element
-   * @param {Function} [cb]
-   */
-
-  p$1.leave = function (op, cb) {
-    this.cancelPending();
-    this.callHook('beforeLeave');
-    this.op = op;
-    this.cb = cb;
-    addClass(this.el, this.leaveClass);
-    this.left = false;
-    this.callHookWithCb('leave');
-    if (this.left) {
-      return; // user called done synchronously.
-    }
-    this.cancel = this.hooks && this.hooks.leaveCancelled;
-    // only need to handle leaveDone if
-    // 1. the transition is already done (synchronously called
-    //    by the user, which causes this.op set to null)
-    // 2. there's no explicit js callback
-    if (this.op && !this.pendingJsCb) {
-      // if a CSS transition leaves immediately after enter,
-      // the transitionend event never fires. therefore we
-      // detect such cases and end the leave immediately.
-      if (this.justEntered) {
-        this.leaveDone();
-      } else {
-        pushJob(this.leaveNextTick);
-      }
-    }
-  };
-
-  /**
-   * The "nextTick" phase of a leaving transition.
-   */
-
-  p$1.leaveNextTick = function () {
-    var type = this.getCssTransitionType(this.leaveClass);
-    if (type) {
-      var event = type === TYPE_TRANSITION ? transitionEndEvent : animationEndEvent;
-      this.setupCssCb(event, this.leaveDone);
-    } else {
-      this.leaveDone();
-    }
-  };
-
-  /**
-   * The "cleanup" phase of a leaving transition.
-   */
-
-  p$1.leaveDone = function () {
-    this.left = true;
-    this.cancel = this.pendingJsCb = null;
-    this.op();
-    removeClass(this.el, this.leaveClass);
-    this.callHook('afterLeave');
-    if (this.cb) this.cb();
-    this.op = null;
-  };
-
-  /**
-   * Cancel any pending callbacks from a previously running
-   * but not finished transition.
-   */
-
-  p$1.cancelPending = function () {
-    this.op = this.cb = null;
-    var hasPending = false;
-    if (this.pendingCssCb) {
-      hasPending = true;
-      off(this.el, this.pendingCssEvent, this.pendingCssCb);
-      this.pendingCssEvent = this.pendingCssCb = null;
-    }
-    if (this.pendingJsCb) {
-      hasPending = true;
-      this.pendingJsCb.cancel();
-      this.pendingJsCb = null;
-    }
-    if (hasPending) {
-      removeClass(this.el, this.enterClass);
-      removeClass(this.el, this.leaveClass);
-    }
-    if (this.cancel) {
-      this.cancel.call(this.vm, this.el);
-      this.cancel = null;
-    }
-  };
-
-  /**
-   * Call a user-provided synchronous hook function.
-   *
-   * @param {String} type
-   */
-
-  p$1.callHook = function (type) {
-    if (this.hooks && this.hooks[type]) {
-      this.hooks[type].call(this.vm, this.el);
-    }
-  };
-
-  /**
-   * Call a user-provided, potentially-async hook function.
-   * We check for the length of arguments to see if the hook
-   * expects a `done` callback. If true, the transition's end
-   * will be determined by when the user calls that callback;
-   * otherwise, the end is determined by the CSS transition or
-   * animation.
-   *
-   * @param {String} type
-   */
-
-  p$1.callHookWithCb = function (type) {
-    var hook = this.hooks && this.hooks[type];
-    if (hook) {
-      if (hook.length > 1) {
-        this.pendingJsCb = cancellable(this[type + 'Done']);
-      }
-      hook.call(this.vm, this.el, this.pendingJsCb);
-    }
-  };
-
-  /**
-   * Get an element's transition type based on the
-   * calculated styles.
-   *
-   * @param {String} className
-   * @return {Number}
-   */
-
-  p$1.getCssTransitionType = function (className) {
-    /* istanbul ignore if */
-    if (!transitionEndEvent ||
-    // skip CSS transitions if page is not visible -
-    // this solves the issue of transitionend events not
-    // firing until the page is visible again.
-    // pageVisibility API is supported in IE10+, same as
-    // CSS transitions.
-    document.hidden ||
-    // explicit js-only transition
-    this.hooks && this.hooks.css === false ||
-    // element is hidden
-    isHidden(this.el)) {
-      return;
-    }
-    var type = this.type || this.typeCache[className];
-    if (type) return type;
-    var inlineStyles = this.el.style;
-    var computedStyles = window.getComputedStyle(this.el);
-    var transDuration = inlineStyles[transDurationProp] || computedStyles[transDurationProp];
-    if (transDuration && transDuration !== '0s') {
-      type = TYPE_TRANSITION;
-    } else {
-      var animDuration = inlineStyles[animDurationProp] || computedStyles[animDurationProp];
-      if (animDuration && animDuration !== '0s') {
-        type = TYPE_ANIMATION;
-      }
-    }
-    if (type) {
-      this.typeCache[className] = type;
-    }
-    return type;
-  };
-
-  /**
-   * Setup a CSS transitionend/animationend callback.
-   *
-   * @param {String} event
-   * @param {Function} cb
-   */
-
-  p$1.setupCssCb = function (event, cb) {
-    this.pendingCssEvent = event;
-    var self = this;
-    var el = this.el;
-    var onEnd = this.pendingCssCb = function (e) {
-      if (e.target === el) {
-        off(el, event, onEnd);
-        self.pendingCssEvent = self.pendingCssCb = null;
-        if (!self.pendingJsCb && cb) {
-          cb();
-        }
-      }
-    };
-    on(el, event, onEnd);
-  };
-
-  /**
-   * Check if an element is hidden - in that case we can just
-   * skip the transition alltogether.
-   *
-   * @param {Element} el
-   * @return {Boolean}
-   */
-
-  function isHidden(el) {
-    if (/svg$/.test(el.namespaceURI)) {
-      // SVG elements do not have offset(Width|Height)
-      // so we need to check the client rect
-      var rect = el.getBoundingClientRect();
-      return !(rect.width || rect.height);
-    } else {
-      return !(el.offsetWidth || el.offsetHeight || el.getClientRects().length);
-    }
-  }
-
-  var transition$1 = {
-
-    priority: TRANSITION,
-
-    update: function update(id, oldId) {
-      var el = this.el;
-      // resolve on owner vm
-      var hooks = resolveAsset(this.vm.$options, 'transitions', id);
-      id = id || 'v';
-      oldId = oldId || 'v';
-      el.__v_trans = new Transition(el, id, hooks, this.vm);
-      removeClass(el, oldId + '-transition');
-      addClass(el, id + '-transition');
-    }
-  };
-
-  var internalDirectives = {
-    style: style,
-    'class': vClass,
-    component: component,
-    prop: propDef,
-    transition: transition$1
-  };
-
-  // special binding prefixes
-  var bindRE = /^v-bind:|^:/;
-  var onRE = /^v-on:|^@/;
-  var dirAttrRE = /^v-([^:]+)(?:$|:(.*)$)/;
-  var modifierRE = /\.[^\.]+/g;
-  var transitionRE = /^(v-bind:|:)?transition$/;
-
-  // default directive priority
-  var DEFAULT_PRIORITY = 1000;
-  var DEFAULT_TERMINAL_PRIORITY = 2000;
-
-  /**
-   * Compile a template and return a reusable composite link
-   * function, which recursively contains more link functions
-   * inside. This top level compile function would normally
-   * be called on instance root nodes, but can also be used
-   * for partial compilation if the partial argument is true.
-   *
-   * The returned composite link function, when called, will
-   * return an unlink function that tearsdown all directives
-   * created during the linking phase.
-   *
-   * @param {Element|DocumentFragment} el
-   * @param {Object} options
-   * @param {Boolean} partial
-   * @return {Function}
-   */
-
-  function compile(el, options, partial) {
-    // link function for the node itself.
-    var nodeLinkFn = partial || !options._asComponent ? compileNode(el, options) : null;
-    // link function for the childNodes
-    var childLinkFn = !(nodeLinkFn && nodeLinkFn.terminal) && !isScript(el) && el.hasChildNodes() ? compileNodeList(el.childNodes, options) : null;
-
-    /**
-     * A composite linker function to be called on a already
-     * compiled piece of DOM, which instantiates all directive
-     * instances.
-     *
-     * @param {Vue} vm
-     * @param {Element|DocumentFragment} el
-     * @param {Vue} [host] - host vm of transcluded content
-     * @param {Object} [scope] - v-for scope
-     * @param {Fragment} [frag] - link context fragment
-     * @return {Function|undefined}
-     */
-
-    return function compositeLinkFn(vm, el, host, scope, frag) {
-      // cache childNodes before linking parent, fix #657
-      var childNodes = toArray(el.childNodes);
-      // link
-      var dirs = linkAndCapture(function compositeLinkCapturer() {
-        if (nodeLinkFn) nodeLinkFn(vm, el, host, scope, frag);
-        if (childLinkFn) childLinkFn(vm, childNodes, host, scope, frag);
-      }, vm);
-      return makeUnlinkFn(vm, dirs);
-    };
-  }
-
-  /**
-   * Apply a linker to a vm/element pair and capture the
-   * directives created during the process.
-   *
-   * @param {Function} linker
-   * @param {Vue} vm
-   */
-
-  function linkAndCapture(linker, vm) {
-    /* istanbul ignore if */
-    if ('development' === 'production') {}
-    var originalDirCount = vm._directives.length;
-    linker();
-    var dirs = vm._directives.slice(originalDirCount);
-    dirs.sort(directiveComparator);
-    for (var i = 0, l = dirs.length; i < l; i++) {
-      dirs[i]._bind();
-    }
-    return dirs;
-  }
-
-  /**
-   * Directive priority sort comparator
-   *
-   * @param {Object} a
-   * @param {Object} b
-   */
-
-  function directiveComparator(a, b) {
-    a = a.descriptor.def.priority || DEFAULT_PRIORITY;
-    b = b.descriptor.def.priority || DEFAULT_PRIORITY;
-    return a > b ? -1 : a === b ? 0 : 1;
-  }
-
-  /**
-   * Linker functions return an unlink function that
-   * tearsdown all directives instances generated during
-   * the process.
-   *
-   * We create unlink functions with only the necessary
-   * information to avoid retaining additional closures.
-   *
-   * @param {Vue} vm
-   * @param {Array} dirs
-   * @param {Vue} [context]
-   * @param {Array} [contextDirs]
-   * @return {Function}
-   */
-
-  function makeUnlinkFn(vm, dirs, context, contextDirs) {
-    function unlink(destroying) {
-      teardownDirs(vm, dirs, destroying);
-      if (context && contextDirs) {
-        teardownDirs(context, contextDirs);
-      }
-    }
-    // expose linked directives
-    unlink.dirs = dirs;
-    return unlink;
-  }
-
-  /**
-   * Teardown partial linked directives.
-   *
-   * @param {Vue} vm
-   * @param {Array} dirs
-   * @param {Boolean} destroying
-   */
-
-  function teardownDirs(vm, dirs, destroying) {
-    var i = dirs.length;
-    while (i--) {
-      dirs[i]._teardown();
-      if ('development' !== 'production' && !destroying) {
-        vm._directives.$remove(dirs[i]);
-      }
-    }
-  }
-
-  /**
-   * Compile link props on an instance.
-   *
-   * @param {Vue} vm
-   * @param {Element} el
-   * @param {Object} props
-   * @param {Object} [scope]
-   * @return {Function}
-   */
-
-  function compileAndLinkProps(vm, el, props, scope) {
-    var propsLinkFn = compileProps(el, props, vm);
-    var propDirs = linkAndCapture(function () {
-      propsLinkFn(vm, scope);
-    }, vm);
-    return makeUnlinkFn(vm, propDirs);
-  }
-
-  /**
-   * Compile the root element of an instance.
-   *
-   * 1. attrs on context container (context scope)
-   * 2. attrs on the component template root node, if
-   *    replace:true (child scope)
-   *
-   * If this is a fragment instance, we only need to compile 1.
-   *
-   * @param {Element} el
-   * @param {Object} options
-   * @param {Object} contextOptions
-   * @return {Function}
-   */
-
-  function compileRoot(el, options, contextOptions) {
-    var containerAttrs = options._containerAttrs;
-    var replacerAttrs = options._replacerAttrs;
-    var contextLinkFn, replacerLinkFn;
-
-    // only need to compile other attributes for
-    // non-fragment instances
-    if (el.nodeType !== 11) {
-      // for components, container and replacer need to be
-      // compiled separately and linked in different scopes.
-      if (options._asComponent) {
-        // 2. container attributes
-        if (containerAttrs && contextOptions) {
-          contextLinkFn = compileDirectives(containerAttrs, contextOptions);
-        }
-        if (replacerAttrs) {
-          // 3. replacer attributes
-          replacerLinkFn = compileDirectives(replacerAttrs, options);
-        }
-      } else {
-        // non-component, just compile as a normal element.
-        replacerLinkFn = compileDirectives(el.attributes, options);
-      }
-    } else if ('development' !== 'production' && containerAttrs) {
-      // warn container directives for fragment instances
-      var names = containerAttrs.filter(function (attr) {
-        // allow vue-loader/vueify scoped css attributes
-        return attr.name.indexOf('_v-') < 0 &&
-        // allow event listeners
-        !onRE.test(attr.name) &&
-        // allow slots
-        attr.name !== 'slot';
-      }).map(function (attr) {
-        return '"' + attr.name + '"';
-      });
-      if (names.length) {
-        var plural = names.length > 1;
-        warn('Attribute' + (plural ? 's ' : ' ') + names.join(', ') + (plural ? ' are' : ' is') + ' ignored on component ' + '<' + options.el.tagName.toLowerCase() + '> because ' + 'the component is a fragment instance: ' + 'http://vuejs.org/guide/components.html#Fragment-Instance');
-      }
-    }
-
-    options._containerAttrs = options._replacerAttrs = null;
-    return function rootLinkFn(vm, el, scope) {
-      // link context scope dirs
-      var context = vm._context;
-      var contextDirs;
-      if (context && contextLinkFn) {
-        contextDirs = linkAndCapture(function () {
-          contextLinkFn(context, el, null, scope);
-        }, context);
-      }
-
-      // link self
-      var selfDirs = linkAndCapture(function () {
-        if (replacerLinkFn) replacerLinkFn(vm, el);
-      }, vm);
-
-      // return the unlink function that tearsdown context
-      // container directives.
-      return makeUnlinkFn(vm, selfDirs, context, contextDirs);
-    };
-  }
-
-  /**
-   * Compile a node and return a nodeLinkFn based on the
-   * node type.
-   *
-   * @param {Node} node
-   * @param {Object} options
-   * @return {Function|null}
-   */
-
-  function compileNode(node, options) {
-    var type = node.nodeType;
-    if (type === 1 && !isScript(node)) {
-      return compileElement(node, options);
-    } else if (type === 3 && node.data.trim()) {
-      return compileTextNode(node, options);
-    } else {
-      return null;
-    }
-  }
-
-  /**
-   * Compile an element and return a nodeLinkFn.
-   *
-   * @param {Element} el
-   * @param {Object} options
-   * @return {Function|null}
-   */
-
-  function compileElement(el, options) {
-    // preprocess textareas.
-    // textarea treats its text content as the initial value.
-    // just bind it as an attr directive for value.
-    if (el.tagName === 'TEXTAREA') {
-      var tokens = parseText(el.value);
-      if (tokens) {
-        el.setAttribute(':value', tokensToExp(tokens));
-        el.value = '';
-      }
-    }
-    var linkFn;
-    var hasAttrs = el.hasAttributes();
-    var attrs = hasAttrs && toArray(el.attributes);
-    // check terminal directives (for & if)
-    if (hasAttrs) {
-      linkFn = checkTerminalDirectives(el, attrs, options);
-    }
-    // check element directives
-    if (!linkFn) {
-      linkFn = checkElementDirectives(el, options);
-    }
-    // check component
-    if (!linkFn) {
-      linkFn = checkComponent(el, options);
-    }
-    // normal directives
-    if (!linkFn && hasAttrs) {
-      linkFn = compileDirectives(attrs, options);
-    }
-    return linkFn;
-  }
-
-  /**
-   * Compile a textNode and return a nodeLinkFn.
-   *
-   * @param {TextNode} node
-   * @param {Object} options
-   * @return {Function|null} textNodeLinkFn
-   */
-
-  function compileTextNode(node, options) {
-    // skip marked text nodes
-    if (node._skip) {
-      return removeText;
-    }
-
-    var tokens = parseText(node.wholeText);
-    if (!tokens) {
-      return null;
-    }
-
-    // mark adjacent text nodes as skipped,
-    // because we are using node.wholeText to compile
-    // all adjacent text nodes together. This fixes
-    // issues in IE where sometimes it splits up a single
-    // text node into multiple ones.
-    var next = node.nextSibling;
-    while (next && next.nodeType === 3) {
-      next._skip = true;
-      next = next.nextSibling;
-    }
-
-    var frag = document.createDocumentFragment();
-    var el, token;
-    for (var i = 0, l = tokens.length; i < l; i++) {
-      token = tokens[i];
-      el = token.tag ? processTextToken(token, options) : document.createTextNode(token.value);
-      frag.appendChild(el);
-    }
-    return makeTextNodeLinkFn(tokens, frag, options);
-  }
-
-  /**
-   * Linker for an skipped text node.
-   *
-   * @param {Vue} vm
-   * @param {Text} node
-   */
-
-  function removeText(vm, node) {
-    remove(node);
-  }
-
-  /**
-   * Process a single text token.
-   *
-   * @param {Object} token
-   * @param {Object} options
-   * @return {Node}
-   */
-
-  function processTextToken(token, options) {
-    var el;
-    if (token.oneTime) {
-      el = document.createTextNode(token.value);
-    } else {
-      if (token.html) {
-        el = document.createComment('v-html');
-        setTokenType('html');
-      } else {
-        // IE will clean up empty textNodes during
-        // frag.cloneNode(true), so we have to give it
-        // something here...
-        el = document.createTextNode(' ');
-        setTokenType('text');
-      }
-    }
-    function setTokenType(type) {
-      if (token.descriptor) return;
-      var parsed = parseDirective(token.value);
-      token.descriptor = {
-        name: type,
-        def: directives[type],
-        expression: parsed.expression,
-        filters: parsed.filters
-      };
-    }
-    return el;
-  }
-
-  /**
-   * Build a function that processes a textNode.
-   *
-   * @param {Array<Object>} tokens
-   * @param {DocumentFragment} frag
-   */
-
-  function makeTextNodeLinkFn(tokens, frag) {
-    return function textNodeLinkFn(vm, el, host, scope) {
-      var fragClone = frag.cloneNode(true);
-      var childNodes = toArray(fragClone.childNodes);
-      var token, value, node;
-      for (var i = 0, l = tokens.length; i < l; i++) {
-        token = tokens[i];
-        value = token.value;
-        if (token.tag) {
-          node = childNodes[i];
-          if (token.oneTime) {
-            value = (scope || vm).$eval(value);
-            if (token.html) {
-              replace(node, parseTemplate(value, true));
-            } else {
-              node.data = _toString(value);
-            }
-          } else {
-            vm._bindDir(token.descriptor, node, host, scope);
-          }
-        }
-      }
-      replace(el, fragClone);
-    };
-  }
-
-  /**
-   * Compile a node list and return a childLinkFn.
-   *
-   * @param {NodeList} nodeList
-   * @param {Object} options
-   * @return {Function|undefined}
-   */
-
-  function compileNodeList(nodeList, options) {
-    var linkFns = [];
-    var nodeLinkFn, childLinkFn, node;
-    for (var i = 0, l = nodeList.length; i < l; i++) {
-      node = nodeList[i];
-      nodeLinkFn = compileNode(node, options);
-      childLinkFn = !(nodeLinkFn && nodeLinkFn.terminal) && node.tagName !== 'SCRIPT' && node.hasChildNodes() ? compileNodeList(node.childNodes, options) : null;
-      linkFns.push(nodeLinkFn, childLinkFn);
-    }
-    return linkFns.length ? makeChildLinkFn(linkFns) : null;
-  }
-
-  /**
-   * Make a child link function for a node's childNodes.
-   *
-   * @param {Array<Function>} linkFns
-   * @return {Function} childLinkFn
-   */
-
-  function makeChildLinkFn(linkFns) {
-    return function childLinkFn(vm, nodes, host, scope, frag) {
-      var node, nodeLinkFn, childrenLinkFn;
-      for (var i = 0, n = 0, l = linkFns.length; i < l; n++) {
-        node = nodes[n];
-        nodeLinkFn = linkFns[i++];
-        childrenLinkFn = linkFns[i++];
-        // cache childNodes before linking parent, fix #657
-        var childNodes = toArray(node.childNodes);
-        if (nodeLinkFn) {
-          nodeLinkFn(vm, node, host, scope, frag);
-        }
-        if (childrenLinkFn) {
-          childrenLinkFn(vm, childNodes, host, scope, frag);
-        }
-      }
-    };
-  }
-
-  /**
-   * Check for element directives (custom elements that should
-   * be resovled as terminal directives).
-   *
-   * @param {Element} el
-   * @param {Object} options
-   */
-
-  function checkElementDirectives(el, options) {
-    var tag = el.tagName.toLowerCase();
-    if (commonTagRE.test(tag)) {
-      return;
-    }
-    var def = resolveAsset(options, 'elementDirectives', tag);
-    if (def) {
-      return makeTerminalNodeLinkFn(el, tag, '', options, def);
-    }
-  }
-
-  /**
-   * Check if an element is a component. If yes, return
-   * a component link function.
-   *
-   * @param {Element} el
-   * @param {Object} options
-   * @return {Function|undefined}
-   */
-
-  function checkComponent(el, options) {
-    var component = checkComponentAttr(el, options);
-    if (component) {
-      var ref = findRef(el);
-      var descriptor = {
-        name: 'component',
-        ref: ref,
-        expression: component.id,
-        def: internalDirectives.component,
-        modifiers: {
-          literal: !component.dynamic
-        }
-      };
-      var componentLinkFn = function componentLinkFn(vm, el, host, scope, frag) {
-        if (ref) {
-          defineReactive((scope || vm).$refs, ref, null);
-        }
-        vm._bindDir(descriptor, el, host, scope, frag);
-      };
-      componentLinkFn.terminal = true;
-      return componentLinkFn;
-    }
-  }
-
-  /**
-   * Check an element for terminal directives in fixed order.
-   * If it finds one, return a terminal link function.
-   *
-   * @param {Element} el
-   * @param {Array} attrs
-   * @param {Object} options
-   * @return {Function} terminalLinkFn
-   */
-
-  function checkTerminalDirectives(el, attrs, options) {
-    // skip v-pre
-    if (getAttr(el, 'v-pre') !== null) {
-      return skip;
-    }
-    // skip v-else block, but only if following v-if
-    if (el.hasAttribute('v-else')) {
-      var prev = el.previousElementSibling;
-      if (prev && prev.hasAttribute('v-if')) {
-        return skip;
-      }
-    }
-
-    var attr, name, value, modifiers, matched, dirName, rawName, arg, def, termDef;
-    for (var i = 0, j = attrs.length; i < j; i++) {
-      attr = attrs[i];
-      name = attr.name.replace(modifierRE, '');
-      if (matched = name.match(dirAttrRE)) {
-        def = resolveAsset(options, 'directives', matched[1]);
-        if (def && def.terminal) {
-          if (!termDef || (def.priority || DEFAULT_TERMINAL_PRIORITY) > termDef.priority) {
-            termDef = def;
-            rawName = attr.name;
-            modifiers = parseModifiers(attr.name);
-            value = attr.value;
-            dirName = matched[1];
-            arg = matched[2];
-          }
-        }
-      }
-    }
-
-    if (termDef) {
-      return makeTerminalNodeLinkFn(el, dirName, value, options, termDef, rawName, arg, modifiers);
-    }
-  }
-
-  function skip() {}
-  skip.terminal = true;
-
-  /**
-   * Build a node link function for a terminal directive.
-   * A terminal link function terminates the current
-   * compilation recursion and handles compilation of the
-   * subtree in the directive.
-   *
-   * @param {Element} el
-   * @param {String} dirName
-   * @param {String} value
-   * @param {Object} options
-   * @param {Object} def
-   * @param {String} [rawName]
-   * @param {String} [arg]
-   * @param {Object} [modifiers]
-   * @return {Function} terminalLinkFn
-   */
-
-  function makeTerminalNodeLinkFn(el, dirName, value, options, def, rawName, arg, modifiers) {
-    var parsed = parseDirective(value);
-    var descriptor = {
-      name: dirName,
-      arg: arg,
-      expression: parsed.expression,
-      filters: parsed.filters,
-      raw: value,
-      attr: rawName,
-      modifiers: modifiers,
-      def: def
-    };
-    // check ref for v-for and router-view
-    if (dirName === 'for' || dirName === 'router-view') {
-      descriptor.ref = findRef(el);
-    }
-    var fn = function terminalNodeLinkFn(vm, el, host, scope, frag) {
-      if (descriptor.ref) {
-        defineReactive((scope || vm).$refs, descriptor.ref, null);
-      }
-      vm._bindDir(descriptor, el, host, scope, frag);
-    };
-    fn.terminal = true;
-    return fn;
-  }
-
-  /**
-   * Compile the directives on an element and return a linker.
-   *
-   * @param {Array|NamedNodeMap} attrs
-   * @param {Object} options
-   * @return {Function}
-   */
-
-  function compileDirectives(attrs, options) {
-    var i = attrs.length;
-    var dirs = [];
-    var attr, name, value, rawName, rawValue, dirName, arg, modifiers, dirDef, tokens, matched;
-    while (i--) {
-      attr = attrs[i];
-      name = rawName = attr.name;
-      value = rawValue = attr.value;
-      tokens = parseText(value);
-      // reset arg
-      arg = null;
-      // check modifiers
-      modifiers = parseModifiers(name);
-      name = name.replace(modifierRE, '');
-
-      // attribute interpolations
-      if (tokens) {
-        value = tokensToExp(tokens);
-        arg = name;
-        pushDir('bind', directives.bind, tokens);
-        // warn against mixing mustaches with v-bind
-        if ('development' !== 'production') {
-          if (name === 'class' && Array.prototype.some.call(attrs, function (attr) {
-            return attr.name === ':class' || attr.name === 'v-bind:class';
-          })) {
-            warn('class="' + rawValue + '": Do not mix mustache interpolation ' + 'and v-bind for "class" on the same element. Use one or the other.', options);
-          }
-        }
-      } else
-
-        // special attribute: transition
-        if (transitionRE.test(name)) {
-          modifiers.literal = !bindRE.test(name);
-          pushDir('transition', internalDirectives.transition);
-        } else
-
-          // event handlers
-          if (onRE.test(name)) {
-            arg = name.replace(onRE, '');
-            pushDir('on', directives.on);
-          } else
-
-            // attribute bindings
-            if (bindRE.test(name)) {
-              dirName = name.replace(bindRE, '');
-              if (dirName === 'style' || dirName === 'class') {
-                pushDir(dirName, internalDirectives[dirName]);
-              } else {
-                arg = dirName;
-                pushDir('bind', directives.bind);
-              }
-            } else
-
-              // normal directives
-              if (matched = name.match(dirAttrRE)) {
-                dirName = matched[1];
-                arg = matched[2];
-
-                // skip v-else (when used with v-show)
-                if (dirName === 'else') {
-                  continue;
-                }
-
-                dirDef = resolveAsset(options, 'directives', dirName, true);
-                if (dirDef) {
-                  pushDir(dirName, dirDef);
-                }
-              }
-    }
-
-    /**
-     * Push a directive.
-     *
-     * @param {String} dirName
-     * @param {Object|Function} def
-     * @param {Array} [interpTokens]
-     */
-
-    function pushDir(dirName, def, interpTokens) {
-      var hasOneTimeToken = interpTokens && hasOneTime(interpTokens);
-      var parsed = !hasOneTimeToken && parseDirective(value);
-      dirs.push({
-        name: dirName,
-        attr: rawName,
-        raw: rawValue,
-        def: def,
-        arg: arg,
-        modifiers: modifiers,
-        // conversion from interpolation strings with one-time token
-        // to expression is differed until directive bind time so that we
-        // have access to the actual vm context for one-time bindings.
-        expression: parsed && parsed.expression,
-        filters: parsed && parsed.filters,
-        interp: interpTokens,
-        hasOneTime: hasOneTimeToken
-      });
-    }
-
-    if (dirs.length) {
-      return makeNodeLinkFn(dirs);
-    }
-  }
-
-  /**
-   * Parse modifiers from directive attribute name.
-   *
-   * @param {String} name
-   * @return {Object}
-   */
-
-  function parseModifiers(name) {
-    var res = Object.create(null);
-    var match = name.match(modifierRE);
-    if (match) {
-      var i = match.length;
-      while (i--) {
-        res[match[i].slice(1)] = true;
-      }
-    }
-    return res;
-  }
-
-  /**
-   * Build a link function for all directives on a single node.
-   *
-   * @param {Array} directives
-   * @return {Function} directivesLinkFn
-   */
-
-  function makeNodeLinkFn(directives) {
-    return function nodeLinkFn(vm, el, host, scope, frag) {
-      // reverse apply because it's sorted low to high
-      var i = directives.length;
-      while (i--) {
-        vm._bindDir(directives[i], el, host, scope, frag);
-      }
-    };
-  }
-
-  /**
-   * Check if an interpolation string contains one-time tokens.
-   *
-   * @param {Array} tokens
-   * @return {Boolean}
-   */
-
-  function hasOneTime(tokens) {
-    var i = tokens.length;
-    while (i--) {
-      if (tokens[i].oneTime) return true;
-    }
-  }
-
-  function isScript(el) {
-    return el.tagName === 'SCRIPT' && (!el.hasAttribute('type') || el.getAttribute('type') === 'text/javascript');
-  }
-
-  var specialCharRE = /[^\w\-:\.]/;
-
-  /**
-   * Process an element or a DocumentFragment based on a
-   * instance option object. This allows us to transclude
-   * a template node/fragment before the instance is created,
-   * so the processed fragment can then be cloned and reused
-   * in v-for.
-   *
-   * @param {Element} el
-   * @param {Object} options
-   * @return {Element|DocumentFragment}
-   */
-
-  function transclude(el, options) {
-    // extract container attributes to pass them down
-    // to compiler, because they need to be compiled in
-    // parent scope. we are mutating the options object here
-    // assuming the same object will be used for compile
-    // right after this.
-    if (options) {
-      options._containerAttrs = extractAttrs(el);
-    }
-    // for template tags, what we want is its content as
-    // a documentFragment (for fragment instances)
-    if (isTemplate(el)) {
-      el = parseTemplate(el);
-    }
-    if (options) {
-      if (options._asComponent && !options.template) {
-        options.template = '<slot></slot>';
-      }
-      if (options.template) {
-        options._content = extractContent(el);
-        el = transcludeTemplate(el, options);
-      }
-    }
-    if (isFragment(el)) {
-      // anchors for fragment instance
-      // passing in `persist: true` to avoid them being
-      // discarded by IE during template cloning
-      prepend(createAnchor('v-start', true), el);
-      el.appendChild(createAnchor('v-end', true));
-    }
-    return el;
-  }
-
-  /**
-   * Process the template option.
-   * If the replace option is true this will swap the $el.
-   *
-   * @param {Element} el
-   * @param {Object} options
-   * @return {Element|DocumentFragment}
-   */
-
-  function transcludeTemplate(el, options) {
-    var template = options.template;
-    var frag = parseTemplate(template, true);
-    if (frag) {
-      var replacer = frag.firstChild;
-      var tag = replacer.tagName && replacer.tagName.toLowerCase();
-      if (options.replace) {
-        /* istanbul ignore if */
-        if (el === document.body) {
-          'development' !== 'production' && warn('You are mounting an instance with a template to ' + '<body>. This will replace <body> entirely. You ' + 'should probably use `replace: false` here.');
-        }
-        // there are many cases where the instance must
-        // become a fragment instance: basically anything that
-        // can create more than 1 root nodes.
-        if (
-        // multi-children template
-        frag.childNodes.length > 1 ||
-        // non-element template
-        replacer.nodeType !== 1 ||
-        // single nested component
-        tag === 'component' || resolveAsset(options, 'components', tag) || hasBindAttr(replacer, 'is') ||
-        // element directive
-        resolveAsset(options, 'elementDirectives', tag) ||
-        // for block
-        replacer.hasAttribute('v-for') ||
-        // if block
-        replacer.hasAttribute('v-if')) {
-          return frag;
-        } else {
-          options._replacerAttrs = extractAttrs(replacer);
-          mergeAttrs(el, replacer);
-          return replacer;
-        }
-      } else {
-        el.appendChild(frag);
-        return el;
-      }
-    } else {
-      'development' !== 'production' && warn('Invalid template option: ' + template);
-    }
-  }
-
-  /**
-   * Helper to extract a component container's attributes
-   * into a plain object array.
-   *
-   * @param {Element} el
-   * @return {Array}
-   */
-
-  function extractAttrs(el) {
-    if (el.nodeType === 1 && el.hasAttributes()) {
-      return toArray(el.attributes);
-    }
-  }
-
-  /**
-   * Merge the attributes of two elements, and make sure
-   * the class names are merged properly.
-   *
-   * @param {Element} from
-   * @param {Element} to
-   */
-
-  function mergeAttrs(from, to) {
-    var attrs = from.attributes;
-    var i = attrs.length;
-    var name, value;
-    while (i--) {
-      name = attrs[i].name;
-      value = attrs[i].value;
-      if (!to.hasAttribute(name) && !specialCharRE.test(name)) {
-        to.setAttribute(name, value);
-      } else if (name === 'class' && !parseText(value) && (value = value.trim())) {
-        value.split(/\s+/).forEach(function (cls) {
-          addClass(to, cls);
-        });
-      }
-    }
-  }
-
-  /**
-   * Scan and determine slot content distribution.
-   * We do this during transclusion instead at compile time so that
-   * the distribution is decoupled from the compilation order of
-   * the slots.
-   *
-   * @param {Element|DocumentFragment} template
-   * @param {Element} content
-   * @param {Vue} vm
-   */
-
-  function resolveSlots(vm, content) {
-    if (!content) {
-      return;
-    }
-    var contents = vm._slotContents = Object.create(null);
-    var el, name;
-    for (var i = 0, l = content.children.length; i < l; i++) {
-      el = content.children[i];
-      /* eslint-disable no-cond-assign */
-      if (name = el.getAttribute('slot')) {
-        (contents[name] || (contents[name] = [])).push(el);
-      }
-      /* eslint-enable no-cond-assign */
-      if ('development' !== 'production' && getBindAttr(el, 'slot')) {
-        warn('The "slot" attribute must be static.', vm.$parent);
-      }
-    }
-    for (name in contents) {
-      contents[name] = extractFragment(contents[name], content);
-    }
-    if (content.hasChildNodes()) {
-      var nodes = content.childNodes;
-      if (nodes.length === 1 && nodes[0].nodeType === 3 && !nodes[0].data.trim()) {
-        return;
-      }
-      contents['default'] = extractFragment(content.childNodes, content);
-    }
-  }
-
-  /**
-   * Extract qualified content nodes from a node list.
-   *
-   * @param {NodeList} nodes
-   * @return {DocumentFragment}
-   */
-
-  function extractFragment(nodes, parent) {
-    var frag = document.createDocumentFragment();
-    nodes = toArray(nodes);
-    for (var i = 0, l = nodes.length; i < l; i++) {
-      var node = nodes[i];
-      if (isTemplate(node) && !node.hasAttribute('v-if') && !node.hasAttribute('v-for')) {
-        parent.removeChild(node);
-        node = parseTemplate(node, true);
-      }
-      frag.appendChild(node);
-    }
-    return frag;
-  }
-
-
-
-  var compiler = Object.freeze({
-  	compile: compile,
-  	compileAndLinkProps: compileAndLinkProps,
-  	compileRoot: compileRoot,
-  	transclude: transclude,
-  	resolveSlots: resolveSlots
-  });
-
-  function stateMixin (Vue) {
-    /**
-     * Accessor for `$data` property, since setting $data
-     * requires observing the new object and updating
-     * proxied properties.
-     */
-
-    Object.defineProperty(Vue.prototype, '$data', {
-      get: function get() {
-        return this._data;
-      },
-      set: function set(newData) {
-        if (newData !== this._data) {
-          this._setData(newData);
-        }
-      }
-    });
-
-    /**
-     * Setup the scope of an instance, which contains:
-     * - observed data
-     * - computed properties
-     * - user methods
-     * - meta properties
-     */
-
-    Vue.prototype._initState = function () {
-      this._initProps();
-      this._initMeta();
-      this._initMethods();
-      this._initData();
-      this._initComputed();
-    };
-
-    /**
-     * Initialize props.
-     */
-
-    Vue.prototype._initProps = function () {
-      var options = this.$options;
-      var el = options.el;
-      var props = options.props;
-      if (props && !el) {
-        'development' !== 'production' && warn('Props will not be compiled if no `el` option is ' + 'provided at instantiation.', this);
-      }
-      // make sure to convert string selectors into element now
-      el = options.el = query(el);
-      this._propsUnlinkFn = el && el.nodeType === 1 && props
-      // props must be linked in proper scope if inside v-for
-      ? compileAndLinkProps(this, el, props, this._scope) : null;
-    };
-
-    /**
-     * Initialize the data.
-     */
-
-    Vue.prototype._initData = function () {
-      var dataFn = this.$options.data;
-      var data = this._data = dataFn ? dataFn() : {};
-      if (!isPlainObject(data)) {
-        data = {};
-        'development' !== 'production' && warn('data functions should return an object.', this);
-      }
-      var props = this._props;
-      // proxy data on instance
-      var keys = Object.keys(data);
-      var i, key;
-      i = keys.length;
-      while (i--) {
-        key = keys[i];
-        // there are two scenarios where we can proxy a data key:
-        // 1. it's not already defined as a prop
-        // 2. it's provided via a instantiation option AND there are no
-        //    template prop present
-        if (!props || !hasOwn(props, key)) {
-          this._proxy(key);
-        } else if ('development' !== 'production') {
-          warn('Data field "' + key + '" is already defined ' + 'as a prop. To provide default value for a prop, use the "default" ' + 'prop option; if you want to pass prop values to an instantiation ' + 'call, use the "propsData" option.', this);
-        }
-      }
-      // observe data
-      observe(data, this);
-    };
-
-    /**
-     * Swap the instance's $data. Called in $data's setter.
-     *
-     * @param {Object} newData
-     */
-
-    Vue.prototype._setData = function (newData) {
-      newData = newData || {};
-      var oldData = this._data;
-      this._data = newData;
-      var keys, key, i;
-      // unproxy keys not present in new data
-      keys = Object.keys(oldData);
-      i = keys.length;
-      while (i--) {
-        key = keys[i];
-        if (!(key in newData)) {
-          this._unproxy(key);
-        }
-      }
-      // proxy keys not already proxied,
-      // and trigger change for changed values
-      keys = Object.keys(newData);
-      i = keys.length;
-      while (i--) {
-        key = keys[i];
-        if (!hasOwn(this, key)) {
-          // new property
-          this._proxy(key);
-        }
-      }
-      oldData.__ob__.removeVm(this);
-      observe(newData, this);
-      this._digest();
-    };
-
-    /**
-     * Proxy a property, so that
-     * vm.prop === vm._data.prop
-     *
-     * @param {String} key
-     */
-
-    Vue.prototype._proxy = function (key) {
-      if (!isReserved(key)) {
-        // need to store ref to self here
-        // because these getter/setters might
-        // be called by child scopes via
-        // prototype inheritance.
-        var self = this;
-        Object.defineProperty(self, key, {
-          configurable: true,
-          enumerable: true,
-          get: function proxyGetter() {
-            return self._data[key];
-          },
-          set: function proxySetter(val) {
-            self._data[key] = val;
-          }
-        });
-      }
-    };
-
-    /**
-     * Unproxy a property.
-     *
-     * @param {String} key
-     */
-
-    Vue.prototype._unproxy = function (key) {
-      if (!isReserved(key)) {
-        delete this[key];
-      }
-    };
-
-    /**
-     * Force update on every watcher in scope.
-     */
-
-    Vue.prototype._digest = function () {
-      for (var i = 0, l = this._watchers.length; i < l; i++) {
-        this._watchers[i].update(true); // shallow updates
-      }
-    };
-
-    /**
-     * Setup computed properties. They are essentially
-     * special getter/setters
-     */
-
-    function noop() {}
-    Vue.prototype._initComputed = function () {
-      var computed = this.$options.computed;
-      if (computed) {
-        for (var key in computed) {
-          var userDef = computed[key];
-          var def = {
-            enumerable: true,
-            configurable: true
-          };
-          if (typeof userDef === 'function') {
-            def.get = makeComputedGetter(userDef, this);
-            def.set = noop;
-          } else {
-            def.get = userDef.get ? userDef.cache !== false ? makeComputedGetter(userDef.get, this) : bind(userDef.get, this) : noop;
-            def.set = userDef.set ? bind(userDef.set, this) : noop;
-          }
-          Object.defineProperty(this, key, def);
-        }
-      }
-    };
-
-    function makeComputedGetter(getter, owner) {
-      var watcher = new Watcher(owner, getter, null, {
-        lazy: true
-      });
-      return function computedGetter() {
+  function createComputedGetter (key) {
+    return function computedGetter () {
+      var watcher = this._computedWatchers && this._computedWatchers[key];
+      if (watcher) {
         if (watcher.dirty) {
           watcher.evaluate();
         }
         if (Dep.target) {
           watcher.depend();
         }
-        return watcher.value;
-      };
-    }
-
-    /**
-     * Setup instance methods. Methods must be bound to the
-     * instance since they might be passed down as a prop to
-     * child components.
-     */
-
-    Vue.prototype._initMethods = function () {
-      var methods = this.$options.methods;
-      if (methods) {
-        for (var key in methods) {
-          this[key] = bind(methods[key], this);
-        }
+        return watcher.value
       }
-    };
-
-    /**
-     * Initialize meta information like $index, $key & $value.
-     */
-
-    Vue.prototype._initMeta = function () {
-      var metas = this.$options._meta;
-      if (metas) {
-        for (var key in metas) {
-          defineReactive(this, key, metas[key]);
-        }
-      }
-    };
-  }
-
-  var eventRE = /^v-on:|^@/;
-
-  function eventsMixin (Vue) {
-    /**
-     * Setup the instance's option events & watchers.
-     * If the value is a string, we pull it from the
-     * instance's methods by name.
-     */
-
-    Vue.prototype._initEvents = function () {
-      var options = this.$options;
-      if (options._asComponent) {
-        registerComponentEvents(this, options.el);
-      }
-      registerCallbacks(this, '$on', options.events);
-      registerCallbacks(this, '$watch', options.watch);
-    };
-
-    /**
-     * Register v-on events on a child component
-     *
-     * @param {Vue} vm
-     * @param {Element} el
-     */
-
-    function registerComponentEvents(vm, el) {
-      var attrs = el.attributes;
-      var name, value, handler;
-      for (var i = 0, l = attrs.length; i < l; i++) {
-        name = attrs[i].name;
-        if (eventRE.test(name)) {
-          name = name.replace(eventRE, '');
-          // force the expression into a statement so that
-          // it always dynamically resolves the method to call (#2670)
-          // kinda ugly hack, but does the job.
-          value = attrs[i].value;
-          if (isSimplePath(value)) {
-            value += '.apply(this, $arguments)';
-          }
-          handler = (vm._scope || vm._context).$eval(value, true);
-          handler._fromParent = true;
-          vm.$on(name.replace(eventRE), handler);
-        }
-      }
-    }
-
-    /**
-     * Register callbacks for option events and watchers.
-     *
-     * @param {Vue} vm
-     * @param {String} action
-     * @param {Object} hash
-     */
-
-    function registerCallbacks(vm, action, hash) {
-      if (!hash) return;
-      var handlers, key, i, j;
-      for (key in hash) {
-        handlers = hash[key];
-        if (isArray(handlers)) {
-          for (i = 0, j = handlers.length; i < j; i++) {
-            register(vm, action, key, handlers[i]);
-          }
-        } else {
-          register(vm, action, key, handlers);
-        }
-      }
-    }
-
-    /**
-     * Helper to register an event/watch callback.
-     *
-     * @param {Vue} vm
-     * @param {String} action
-     * @param {String} key
-     * @param {Function|String|Object} handler
-     * @param {Object} [options]
-     */
-
-    function register(vm, action, key, handler, options) {
-      var type = typeof handler;
-      if (type === 'function') {
-        vm[action](key, handler, options);
-      } else if (type === 'string') {
-        var methods = vm.$options.methods;
-        var method = methods && methods[handler];
-        if (method) {
-          vm[action](key, method, options);
-        } else {
-          'development' !== 'production' && warn('Unknown method: "' + handler + '" when ' + 'registering callback for ' + action + ': "' + key + '".', vm);
-        }
-      } else if (handler && type === 'object') {
-        register(vm, action, key, handler.handler, handler);
-      }
-    }
-
-    /**
-     * Setup recursive attached/detached calls
-     */
-
-    Vue.prototype._initDOMHooks = function () {
-      this.$on('hook:attached', onAttached);
-      this.$on('hook:detached', onDetached);
-    };
-
-    /**
-     * Callback to recursively call attached hook on children
-     */
-
-    function onAttached() {
-      if (!this._isAttached) {
-        this._isAttached = true;
-        this.$children.forEach(callAttach);
-      }
-    }
-
-    /**
-     * Iterator to call attached hook
-     *
-     * @param {Vue} child
-     */
-
-    function callAttach(child) {
-      if (!child._isAttached && inDoc(child.$el)) {
-        child._callHook('attached');
-      }
-    }
-
-    /**
-     * Callback to recursively call detached hook on children
-     */
-
-    function onDetached() {
-      if (this._isAttached) {
-        this._isAttached = false;
-        this.$children.forEach(callDetach);
-      }
-    }
-
-    /**
-     * Iterator to call detached hook
-     *
-     * @param {Vue} child
-     */
-
-    function callDetach(child) {
-      if (child._isAttached && !inDoc(child.$el)) {
-        child._callHook('detached');
-      }
-    }
-
-    /**
-     * Trigger all handlers for a hook
-     *
-     * @param {String} hook
-     */
-
-    Vue.prototype._callHook = function (hook) {
-      this.$emit('pre-hook:' + hook);
-      var handlers = this.$options[hook];
-      if (handlers) {
-        for (var i = 0, j = handlers.length; i < j; i++) {
-          handlers[i].call(this);
-        }
-      }
-      this.$emit('hook:' + hook);
-    };
-  }
-
-  function noop$1() {}
-
-  /**
-   * A directive links a DOM element with a piece of data,
-   * which is the result of evaluating an expression.
-   * It registers a watcher with the expression and calls
-   * the DOM update function when a change is triggered.
-   *
-   * @param {Object} descriptor
-   *                 - {String} name
-   *                 - {Object} def
-   *                 - {String} expression
-   *                 - {Array<Object>} [filters]
-   *                 - {Object} [modifiers]
-   *                 - {Boolean} literal
-   *                 - {String} attr
-   *                 - {String} arg
-   *                 - {String} raw
-   *                 - {String} [ref]
-   *                 - {Array<Object>} [interp]
-   *                 - {Boolean} [hasOneTime]
-   * @param {Vue} vm
-   * @param {Node} el
-   * @param {Vue} [host] - transclusion host component
-   * @param {Object} [scope] - v-for scope
-   * @param {Fragment} [frag] - owner fragment
-   * @constructor
-   */
-  function Directive(descriptor, vm, el, host, scope, frag) {
-    this.vm = vm;
-    this.el = el;
-    // copy descriptor properties
-    this.descriptor = descriptor;
-    this.name = descriptor.name;
-    this.expression = descriptor.expression;
-    this.arg = descriptor.arg;
-    this.modifiers = descriptor.modifiers;
-    this.filters = descriptor.filters;
-    this.literal = this.modifiers && this.modifiers.literal;
-    // private
-    this._locked = false;
-    this._bound = false;
-    this._listeners = null;
-    // link context
-    this._host = host;
-    this._scope = scope;
-    this._frag = frag;
-    // store directives on node in dev mode
-    if ('development' !== 'production' && this.el) {
-      this.el._vue_directives = this.el._vue_directives || [];
-      this.el._vue_directives.push(this);
     }
   }
 
-  /**
-   * Initialize the directive, mixin definition properties,
-   * setup the watcher, call definition bind() and update()
-   * if present.
-   */
-
-  Directive.prototype._bind = function () {
-    var name = this.name;
-    var descriptor = this.descriptor;
-
-    // remove attribute
-    if ((name !== 'cloak' || this.vm._isCompiled) && this.el && this.el.removeAttribute) {
-      var attr = descriptor.attr || 'v-' + name;
-      this.el.removeAttribute(attr);
+  function createGetterInvoker(fn) {
+    return function computedGetter () {
+      return fn.call(this, this)
     }
+  }
 
-    // copy def properties
-    var def = descriptor.def;
-    if (typeof def === 'function') {
-      this.update = def;
-    } else {
-      extend(this, def);
-    }
-
-    // setup directive params
-    this._setupParams();
-
-    // initial bind
-    if (this.bind) {
-      this.bind();
-    }
-    this._bound = true;
-
-    if (this.literal) {
-      this.update && this.update(descriptor.raw);
-    } else if ((this.expression || this.modifiers) && (this.update || this.twoWay) && !this._checkStatement()) {
-      // wrapped updater for context
-      var dir = this;
-      if (this.update) {
-        this._update = function (val, oldVal) {
-          if (!dir._locked) {
-            dir.update(val, oldVal);
-          }
-        };
-      } else {
-        this._update = noop$1;
-      }
-      var preProcess = this._preProcess ? bind(this._preProcess, this) : null;
-      var postProcess = this._postProcess ? bind(this._postProcess, this) : null;
-      var watcher = this._watcher = new Watcher(this.vm, this.expression, this._update, // callback
+  function initMethods (vm, methods) {
+    var props = vm.$options.props;
+    for (var key in methods) {
       {
-        filters: this.filters,
-        twoWay: this.twoWay,
-        deep: this.deep,
-        preProcess: preProcess,
-        postProcess: postProcess,
-        scope: this._scope
-      });
-      // v-model with inital inline value need to sync back to
-      // model instead of update to DOM on init. They would
-      // set the afterBind hook to indicate that.
-      if (this.afterBind) {
-        this.afterBind();
-      } else if (this.update) {
-        this.update(watcher.value);
+        if (typeof methods[key] !== 'function') {
+          warn(
+            "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+            "Did you reference the function correctly?",
+            vm
+          );
+        }
+        if (props && hasOwn(props, key)) {
+          warn(
+            ("Method \"" + key + "\" has already been defined as a prop."),
+            vm
+          );
+        }
+        if ((key in vm) && isReserved(key)) {
+          warn(
+            "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+            "Avoid defining component methods that start with _ or $."
+          );
+        }
       }
+      vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
     }
-  };
-
-  /**
-   * Setup all param attributes, e.g. track-by,
-   * transition-mode, etc...
-   */
-
-  Directive.prototype._setupParams = function () {
-    if (!this.params) {
-      return;
-    }
-    var params = this.params;
-    // swap the params array with a fresh object.
-    this.params = Object.create(null);
-    var i = params.length;
-    var key, val, mappedKey;
-    while (i--) {
-      key = hyphenate(params[i]);
-      mappedKey = camelize(key);
-      val = getBindAttr(this.el, key);
-      if (val != null) {
-        // dynamic
-        this._setupParamWatcher(mappedKey, val);
-      } else {
-        // static
-        val = getAttr(this.el, key);
-        if (val != null) {
-          this.params[mappedKey] = val === '' ? true : val;
-        }
-      }
-    }
-  };
-
-  /**
-   * Setup a watcher for a dynamic param.
-   *
-   * @param {String} key
-   * @param {String} expression
-   */
-
-  Directive.prototype._setupParamWatcher = function (key, expression) {
-    var self = this;
-    var called = false;
-    var unwatch = (this._scope || this.vm).$watch(expression, function (val, oldVal) {
-      self.params[key] = val;
-      // since we are in immediate mode,
-      // only call the param change callbacks if this is not the first update.
-      if (called) {
-        var cb = self.paramWatchers && self.paramWatchers[key];
-        if (cb) {
-          cb.call(self, val, oldVal);
-        }
-      } else {
-        called = true;
-      }
-    }, {
-      immediate: true,
-      user: false
-    });(this._paramUnwatchFns || (this._paramUnwatchFns = [])).push(unwatch);
-  };
-
-  /**
-   * Check if the directive is a function caller
-   * and if the expression is a callable one. If both true,
-   * we wrap up the expression and use it as the event
-   * handler.
-   *
-   * e.g. on-click="a++"
-   *
-   * @return {Boolean}
-   */
-
-  Directive.prototype._checkStatement = function () {
-    var expression = this.expression;
-    if (expression && this.acceptStatement && !isSimplePath(expression)) {
-      var fn = parseExpression(expression).get;
-      var scope = this._scope || this.vm;
-      var handler = function handler(e) {
-        scope.$event = e;
-        fn.call(scope, scope);
-        scope.$event = null;
-      };
-      if (this.filters) {
-        handler = scope._applyFilters(handler, null, this.filters);
-      }
-      this.update(handler);
-      return true;
-    }
-  };
-
-  /**
-   * Set the corresponding value with the setter.
-   * This should only be used in two-way directives
-   * e.g. v-model.
-   *
-   * @param {*} value
-   * @public
-   */
-
-  Directive.prototype.set = function (value) {
-    /* istanbul ignore else */
-    if (this.twoWay) {
-      this._withLock(function () {
-        this._watcher.set(value);
-      });
-    } else if ('development' !== 'production') {
-      warn('Directive.set() can only be used inside twoWay' + 'directives.');
-    }
-  };
-
-  /**
-   * Execute a function while preventing that function from
-   * triggering updates on this directive instance.
-   *
-   * @param {Function} fn
-   */
-
-  Directive.prototype._withLock = function (fn) {
-    var self = this;
-    self._locked = true;
-    fn.call(self);
-    nextTick(function () {
-      self._locked = false;
-    });
-  };
-
-  /**
-   * Convenience method that attaches a DOM event listener
-   * to the directive element and autometically tears it down
-   * during unbind.
-   *
-   * @param {String} event
-   * @param {Function} handler
-   * @param {Boolean} [useCapture]
-   */
-
-  Directive.prototype.on = function (event, handler, useCapture) {
-    on(this.el, event, handler, useCapture);(this._listeners || (this._listeners = [])).push([event, handler]);
-  };
-
-  /**
-   * Teardown the watcher and call unbind.
-   */
-
-  Directive.prototype._teardown = function () {
-    if (this._bound) {
-      this._bound = false;
-      if (this.unbind) {
-        this.unbind();
-      }
-      if (this._watcher) {
-        this._watcher.teardown();
-      }
-      var listeners = this._listeners;
-      var i;
-      if (listeners) {
-        i = listeners.length;
-        while (i--) {
-          off(this.el, listeners[i][0], listeners[i][1]);
-        }
-      }
-      var unwatchFns = this._paramUnwatchFns;
-      if (unwatchFns) {
-        i = unwatchFns.length;
-        while (i--) {
-          unwatchFns[i]();
-        }
-      }
-      if ('development' !== 'production' && this.el) {
-        this.el._vue_directives.$remove(this);
-      }
-      this.vm = this.el = this._watcher = this._listeners = null;
-    }
-  };
-
-  function lifecycleMixin (Vue) {
-    /**
-     * Update v-ref for component.
-     *
-     * @param {Boolean} remove
-     */
-
-    Vue.prototype._updateRef = function (remove) {
-      var ref = this.$options._ref;
-      if (ref) {
-        var refs = (this._scope || this._context).$refs;
-        if (remove) {
-          if (refs[ref] === this) {
-            refs[ref] = null;
-          }
-        } else {
-          refs[ref] = this;
-        }
-      }
-    };
-
-    /**
-     * Transclude, compile and link element.
-     *
-     * If a pre-compiled linker is available, that means the
-     * passed in element will be pre-transcluded and compiled
-     * as well - all we need to do is to call the linker.
-     *
-     * Otherwise we need to call transclude/compile/link here.
-     *
-     * @param {Element} el
-     */
-
-    Vue.prototype._compile = function (el) {
-      var options = this.$options;
-
-      // transclude and init element
-      // transclude can potentially replace original
-      // so we need to keep reference; this step also injects
-      // the template and caches the original attributes
-      // on the container node and replacer node.
-      var original = el;
-      el = transclude(el, options);
-      this._initElement(el);
-
-      // handle v-pre on root node (#2026)
-      if (el.nodeType === 1 && getAttr(el, 'v-pre') !== null) {
-        return;
-      }
-
-      // root is always compiled per-instance, because
-      // container attrs and props can be different every time.
-      var contextOptions = this._context && this._context.$options;
-      var rootLinker = compileRoot(el, options, contextOptions);
-
-      // resolve slot distribution
-      resolveSlots(this, options._content);
-
-      // compile and link the rest
-      var contentLinkFn;
-      var ctor = this.constructor;
-      // component compilation can be cached
-      // as long as it's not using inline-template
-      if (options._linkerCachable) {
-        contentLinkFn = ctor.linker;
-        if (!contentLinkFn) {
-          contentLinkFn = ctor.linker = compile(el, options);
-        }
-      }
-
-      // link phase
-      // make sure to link root with prop scope!
-      var rootUnlinkFn = rootLinker(this, el, this._scope);
-      var contentUnlinkFn = contentLinkFn ? contentLinkFn(this, el) : compile(el, options)(this, el);
-
-      // register composite unlink function
-      // to be called during instance destruction
-      this._unlinkFn = function () {
-        rootUnlinkFn();
-        // passing destroying: true to avoid searching and
-        // splicing the directives
-        contentUnlinkFn(true);
-      };
-
-      // finally replace original
-      if (options.replace) {
-        replace(original, el);
-      }
-
-      this._isCompiled = true;
-      this._callHook('compiled');
-    };
-
-    /**
-     * Initialize instance element. Called in the public
-     * $mount() method.
-     *
-     * @param {Element} el
-     */
-
-    Vue.prototype._initElement = function (el) {
-      if (isFragment(el)) {
-        this._isFragment = true;
-        this.$el = this._fragmentStart = el.firstChild;
-        this._fragmentEnd = el.lastChild;
-        // set persisted text anchors to empty
-        if (this._fragmentStart.nodeType === 3) {
-          this._fragmentStart.data = this._fragmentEnd.data = '';
-        }
-        this._fragment = el;
-      } else {
-        this.$el = el;
-      }
-      this.$el.__vue__ = this;
-      this._callHook('beforeCompile');
-    };
-
-    /**
-     * Create and bind a directive to an element.
-     *
-     * @param {Object} descriptor - parsed directive descriptor
-     * @param {Node} node   - target node
-     * @param {Vue} [host] - transclusion host component
-     * @param {Object} [scope] - v-for scope
-     * @param {Fragment} [frag] - owner fragment
-     */
-
-    Vue.prototype._bindDir = function (descriptor, node, host, scope, frag) {
-      this._directives.push(new Directive(descriptor, this, node, host, scope, frag));
-    };
-
-    /**
-     * Teardown an instance, unobserves the data, unbind all the
-     * directives, turn off all the event listeners, etc.
-     *
-     * @param {Boolean} remove - whether to remove the DOM node.
-     * @param {Boolean} deferCleanup - if true, defer cleanup to
-     *                                 be called later
-     */
-
-    Vue.prototype._destroy = function (remove, deferCleanup) {
-      if (this._isBeingDestroyed) {
-        if (!deferCleanup) {
-          this._cleanup();
-        }
-        return;
-      }
-
-      var destroyReady;
-      var pendingRemoval;
-
-      var self = this;
-      // Cleanup should be called either synchronously or asynchronoysly as
-      // callback of this.$remove(), or if remove and deferCleanup are false.
-      // In any case it should be called after all other removing, unbinding and
-      // turning of is done
-      var cleanupIfPossible = function cleanupIfPossible() {
-        if (destroyReady && !pendingRemoval && !deferCleanup) {
-          self._cleanup();
-        }
-      };
-
-      // remove DOM element
-      if (remove && this.$el) {
-        pendingRemoval = true;
-        this.$remove(function () {
-          pendingRemoval = false;
-          cleanupIfPossible();
-        });
-      }
-
-      this._callHook('beforeDestroy');
-      this._isBeingDestroyed = true;
-      var i;
-      // remove self from parent. only necessary
-      // if parent is not being destroyed as well.
-      var parent = this.$parent;
-      if (parent && !parent._isBeingDestroyed) {
-        parent.$children.$remove(this);
-        // unregister ref (remove: true)
-        this._updateRef(true);
-      }
-      // destroy all children.
-      i = this.$children.length;
-      while (i--) {
-        this.$children[i].$destroy();
-      }
-      // teardown props
-      if (this._propsUnlinkFn) {
-        this._propsUnlinkFn();
-      }
-      // teardown all directives. this also tearsdown all
-      // directive-owned watchers.
-      if (this._unlinkFn) {
-        this._unlinkFn();
-      }
-      i = this._watchers.length;
-      while (i--) {
-        this._watchers[i].teardown();
-      }
-      // remove reference to self on $el
-      if (this.$el) {
-        this.$el.__vue__ = null;
-      }
-
-      destroyReady = true;
-      cleanupIfPossible();
-    };
-
-    /**
-     * Clean up to ensure garbage collection.
-     * This is called after the leave transition if there
-     * is any.
-     */
-
-    Vue.prototype._cleanup = function () {
-      if (this._isDestroyed) {
-        return;
-      }
-      // remove self from owner fragment
-      // do it in cleanup so that we can call $destroy with
-      // defer right when a fragment is about to be removed.
-      if (this._frag) {
-        this._frag.children.$remove(this);
-      }
-      // remove reference from data ob
-      // frozen object may not have observer.
-      if (this._data && this._data.__ob__) {
-        this._data.__ob__.removeVm(this);
-      }
-      // Clean up references to private properties and other
-      // instances. preserve reference to _data so that proxy
-      // accessors still work. The only potential side effect
-      // here is that mutating the instance after it's destroyed
-      // may affect the state of other components that are still
-      // observing the same object, but that seems to be a
-      // reasonable responsibility for the user rather than
-      // always throwing an error on them.
-      this.$el = this.$parent = this.$root = this.$children = this._watchers = this._context = this._scope = this._directives = null;
-      // call the last hook...
-      this._isDestroyed = true;
-      this._callHook('destroyed');
-      // turn off all instance listeners.
-      this.$off();
-    };
   }
 
-  function miscMixin (Vue) {
-    /**
-     * Apply a list of filter (descriptors) to a value.
-     * Using plain for loops here because this will be called in
-     * the getter of any watcher with filters so it is very
-     * performance sensitive.
-     *
-     * @param {*} value
-     * @param {*} [oldValue]
-     * @param {Array} filters
-     * @param {Boolean} write
-     * @return {*}
-     */
-
-    Vue.prototype._applyFilters = function (value, oldValue, filters, write) {
-      var filter, fn, args, arg, offset, i, l, j, k;
-      for (i = 0, l = filters.length; i < l; i++) {
-        filter = filters[write ? l - i - 1 : i];
-        fn = resolveAsset(this.$options, 'filters', filter.name, true);
-        if (!fn) continue;
-        fn = write ? fn.write : fn.read || fn;
-        if (typeof fn !== 'function') continue;
-        args = write ? [value, oldValue] : [value];
-        offset = write ? 2 : 1;
-        if (filter.args) {
-          for (j = 0, k = filter.args.length; j < k; j++) {
-            arg = filter.args[j];
-            args[j + offset] = arg.dynamic ? this.$get(arg.value) : arg.value;
-          }
-        }
-        value = fn.apply(this, args);
-      }
-      return value;
-    };
-
-    /**
-     * Resolve a component, depending on whether the component
-     * is defined normally or using an async factory function.
-     * Resolves synchronously if already resolved, otherwise
-     * resolves asynchronously and caches the resolved
-     * constructor on the factory.
-     *
-     * @param {String|Function} value
-     * @param {Function} cb
-     */
-
-    Vue.prototype._resolveComponent = function (value, cb) {
-      var factory;
-      if (typeof value === 'function') {
-        factory = value;
-      } else {
-        factory = resolveAsset(this.$options, 'components', value, true);
-      }
-      /* istanbul ignore if */
-      if (!factory) {
-        return;
-      }
-      // async component factory
-      if (!factory.options) {
-        if (factory.resolved) {
-          // cached
-          cb(factory.resolved);
-        } else if (factory.requested) {
-          // pool callbacks
-          factory.pendingCallbacks.push(cb);
-        } else {
-          factory.requested = true;
-          var cbs = factory.pendingCallbacks = [cb];
-          factory.call(this, function resolve(res) {
-            if (isPlainObject(res)) {
-              res = Vue.extend(res);
-            }
-            // cache resolved
-            factory.resolved = res;
-            // invoke callbacks
-            for (var i = 0, l = cbs.length; i < l; i++) {
-              cbs[i](res);
-            }
-          }, function reject(reason) {
-            'development' !== 'production' && warn('Failed to resolve async component' + (typeof value === 'string' ? ': ' + value : '') + '. ' + (reason ? '\nReason: ' + reason : ''));
-          });
+  function initWatch (vm, watch) {
+    for (var key in watch) {
+      var handler = watch[key];
+      if (Array.isArray(handler)) {
+        for (var i = 0; i < handler.length; i++) {
+          createWatcher(vm, key, handler[i]);
         }
       } else {
-        // normal component
-        cb(factory);
+        createWatcher(vm, key, handler);
       }
-    };
+    }
   }
 
-  var filterRE$1 = /[^|]\|[^|]/;
+  function createWatcher (
+    vm,
+    expOrFn,
+    handler,
+    options
+  ) {
+    if (isPlainObject(handler)) {
+      options = handler;
+      handler = handler.handler;
+    }
+    if (typeof handler === 'string') {
+      handler = vm[handler];
+    }
+    return vm.$watch(expOrFn, handler, options)
+  }
 
-  function dataAPI (Vue) {
-    /**
-     * Get the value from an expression on this vm.
-     *
-     * @param {String} exp
-     * @param {Boolean} [asStatement]
-     * @return {*}
-     */
+  function stateMixin (Vue) {
+    // flow somehow has problems with directly declared definition object
+    // when using Object.defineProperty, so we have to procedurally build up
+    // the object here.
+    var dataDef = {};
+    dataDef.get = function () { return this._data };
+    var propsDef = {};
+    propsDef.get = function () { return this._props };
+    {
+      dataDef.set = function () {
+        warn(
+          'Avoid replacing instance root $data. ' +
+          'Use nested data properties instead.',
+          this
+        );
+      };
+      propsDef.set = function () {
+        warn("$props is readonly.", this);
+      };
+    }
+    Object.defineProperty(Vue.prototype, '$data', dataDef);
+    Object.defineProperty(Vue.prototype, '$props', propsDef);
 
-    Vue.prototype.$get = function (exp, asStatement) {
-      var res = parseExpression(exp);
-      if (res) {
-        if (asStatement) {
-          var self = this;
-          return function statementHandler() {
-            self.$arguments = toArray(arguments);
-            var result = res.get.call(self, self);
-            self.$arguments = null;
-            return result;
-          };
-        } else {
-          try {
-            return res.get.call(this, this);
-          } catch (e) {}
-        }
-      }
-    };
+    Vue.prototype.$set = set;
+    Vue.prototype.$delete = del;
 
-    /**
-     * Set the value from an expression on this vm.
-     * The expression must be a valid left-hand
-     * expression in an assignment.
-     *
-     * @param {String} exp
-     * @param {*} val
-     */
-
-    Vue.prototype.$set = function (exp, val) {
-      var res = parseExpression(exp, true);
-      if (res && res.set) {
-        res.set.call(this, this, val);
-      }
-    };
-
-    /**
-     * Delete a property on the VM
-     *
-     * @param {String} key
-     */
-
-    Vue.prototype.$delete = function (key) {
-      del(this._data, key);
-    };
-
-    /**
-     * Watch an expression, trigger callback when its
-     * value changes.
-     *
-     * @param {String|Function} expOrFn
-     * @param {Function} cb
-     * @param {Object} [options]
-     *                 - {Boolean} deep
-     *                 - {Boolean} immediate
-     * @return {Function} - unwatchFn
-     */
-
-    Vue.prototype.$watch = function (expOrFn, cb, options) {
+    Vue.prototype.$watch = function (
+      expOrFn,
+      cb,
+      options
+    ) {
       var vm = this;
-      var parsed;
-      if (typeof expOrFn === 'string') {
-        parsed = parseDirective(expOrFn);
-        expOrFn = parsed.expression;
+      if (isPlainObject(cb)) {
+        return createWatcher(vm, expOrFn, cb, options)
       }
-      var watcher = new Watcher(vm, expOrFn, cb, {
-        deep: options && options.deep,
-        sync: options && options.sync,
-        filters: parsed && parsed.filters,
-        user: !options || options.user !== false
-      });
-      if (options && options.immediate) {
-        cb.call(vm, watcher.value);
+      options = options || {};
+      options.user = true;
+      var watcher = new Watcher(vm, expOrFn, cb, options);
+      if (options.immediate) {
+        var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";
+        pushTarget();
+        invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
+        popTarget();
       }
-      return function unwatchFn() {
+      return function unwatchFn () {
         watcher.teardown();
-      };
-    };
-
-    /**
-     * Evaluate a text directive, including filters.
-     *
-     * @param {String} text
-     * @param {Boolean} [asStatement]
-     * @return {String}
-     */
-
-    Vue.prototype.$eval = function (text, asStatement) {
-      // check for filters.
-      if (filterRE$1.test(text)) {
-        var dir = parseDirective(text);
-        // the filter regex check might give false positive
-        // for pipes inside strings, so it's possible that
-        // we don't get any filters here
-        var val = this.$get(dir.expression, asStatement);
-        return dir.filters ? this._applyFilters(val, null, dir.filters) : val;
-      } else {
-        // no filter
-        return this.$get(text, asStatement);
       }
     };
+  }
 
-    /**
-     * Interpolate a piece of template text.
-     *
-     * @param {String} text
-     * @return {String}
-     */
+  /*  */
 
-    Vue.prototype.$interpolate = function (text) {
-      var tokens = parseText(text);
+  var uid$3 = 0;
+
+  function initMixin (Vue) {
+    Vue.prototype._init = function (options) {
       var vm = this;
-      if (tokens) {
-        if (tokens.length === 1) {
-          return vm.$eval(tokens[0].value) + '';
-        } else {
-          return tokens.map(function (token) {
-            return token.tag ? vm.$eval(token.value) : token.value;
-          }).join('');
-        }
+      // a uid
+      vm._uid = uid$3++;
+
+      var startTag, endTag;
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        startTag = "vue-perf-start:" + (vm._uid);
+        endTag = "vue-perf-end:" + (vm._uid);
+        mark(startTag);
+      }
+
+      // a flag to avoid this being observed
+      vm._isVue = true;
+      // merge options
+      if (options && options._isComponent) {
+        // optimize internal component instantiation
+        // since dynamic options merging is pretty slow, and none of the
+        // internal component options needs special treatment.
+        initInternalComponent(vm, options);
       } else {
-        return text;
+        vm.$options = mergeOptions(
+          resolveConstructorOptions(vm.constructor),
+          options || {},
+          vm
+        );
       }
-    };
-
-    /**
-     * Log instance data as a plain JS object
-     * so that it is easier to inspect in console.
-     * This method assumes console is available.
-     *
-     * @param {String} [path]
-     */
-
-    Vue.prototype.$log = function (path) {
-      var data = path ? getPath(this._data, path) : this._data;
-      if (data) {
-        data = clean(data);
+      /* istanbul ignore else */
+      {
+        initProxy(vm);
       }
-      // include computed fields
-      if (!path) {
-        var key;
-        for (key in this.$options.computed) {
-          data[key] = clean(this[key]);
-        }
-        if (this._props) {
-          for (key in this._props) {
-            data[key] = clean(this[key]);
-          }
-        }
+      // expose real self
+      vm._self = vm;
+      initLifecycle(vm);
+      initEvents(vm);
+      initRender(vm);
+      callHook(vm, 'beforeCreate');
+      initInjections(vm); // resolve injections before data/props
+      initState(vm);
+      initProvide(vm); // resolve provide after data/props
+      callHook(vm, 'created');
+
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        vm._name = formatComponentName(vm, false);
+        mark(endTag);
+        measure(("vue " + (vm._name) + " init"), startTag, endTag);
       }
-      console.log(data);
-    };
 
-    /**
-     * "clean" a getter/setter converted object into a plain
-     * object copy.
-     *
-     * @param {Object} - obj
-     * @return {Object}
-     */
-
-    function clean(obj) {
-      return JSON.parse(JSON.stringify(obj));
-    }
-  }
-
-  function domAPI (Vue) {
-    /**
-     * Convenience on-instance nextTick. The callback is
-     * auto-bound to the instance, and this avoids component
-     * modules having to rely on the global Vue.
-     *
-     * @param {Function} fn
-     */
-
-    Vue.prototype.$nextTick = function (fn) {
-      nextTick(fn, this);
-    };
-
-    /**
-     * Append instance to target
-     *
-     * @param {Node} target
-     * @param {Function} [cb]
-     * @param {Boolean} [withTransition] - defaults to true
-     */
-
-    Vue.prototype.$appendTo = function (target, cb, withTransition) {
-      return insert(this, target, cb, withTransition, append, appendWithTransition);
-    };
-
-    /**
-     * Prepend instance to target
-     *
-     * @param {Node} target
-     * @param {Function} [cb]
-     * @param {Boolean} [withTransition] - defaults to true
-     */
-
-    Vue.prototype.$prependTo = function (target, cb, withTransition) {
-      target = query(target);
-      if (target.hasChildNodes()) {
-        this.$before(target.firstChild, cb, withTransition);
-      } else {
-        this.$appendTo(target, cb, withTransition);
+      if (vm.$options.el) {
+        vm.$mount(vm.$options.el);
       }
-      return this;
-    };
-
-    /**
-     * Insert instance before target
-     *
-     * @param {Node} target
-     * @param {Function} [cb]
-     * @param {Boolean} [withTransition] - defaults to true
-     */
-
-    Vue.prototype.$before = function (target, cb, withTransition) {
-      return insert(this, target, cb, withTransition, beforeWithCb, beforeWithTransition);
-    };
-
-    /**
-     * Insert instance after target
-     *
-     * @param {Node} target
-     * @param {Function} [cb]
-     * @param {Boolean} [withTransition] - defaults to true
-     */
-
-    Vue.prototype.$after = function (target, cb, withTransition) {
-      target = query(target);
-      if (target.nextSibling) {
-        this.$before(target.nextSibling, cb, withTransition);
-      } else {
-        this.$appendTo(target.parentNode, cb, withTransition);
-      }
-      return this;
-    };
-
-    /**
-     * Remove instance from DOM
-     *
-     * @param {Function} [cb]
-     * @param {Boolean} [withTransition] - defaults to true
-     */
-
-    Vue.prototype.$remove = function (cb, withTransition) {
-      if (!this.$el.parentNode) {
-        return cb && cb();
-      }
-      var inDocument = this._isAttached && inDoc(this.$el);
-      // if we are not in document, no need to check
-      // for transitions
-      if (!inDocument) withTransition = false;
-      var self = this;
-      var realCb = function realCb() {
-        if (inDocument) self._callHook('detached');
-        if (cb) cb();
-      };
-      if (this._isFragment) {
-        removeNodeRange(this._fragmentStart, this._fragmentEnd, this, this._fragment, realCb);
-      } else {
-        var op = withTransition === false ? removeWithCb : removeWithTransition;
-        op(this.$el, this, realCb);
-      }
-      return this;
-    };
-
-    /**
-     * Shared DOM insertion function.
-     *
-     * @param {Vue} vm
-     * @param {Element} target
-     * @param {Function} [cb]
-     * @param {Boolean} [withTransition]
-     * @param {Function} op1 - op for non-transition insert
-     * @param {Function} op2 - op for transition insert
-     * @return vm
-     */
-
-    function insert(vm, target, cb, withTransition, op1, op2) {
-      target = query(target);
-      var targetIsDetached = !inDoc(target);
-      var op = withTransition === false || targetIsDetached ? op1 : op2;
-      var shouldCallHook = !targetIsDetached && !vm._isAttached && !inDoc(vm.$el);
-      if (vm._isFragment) {
-        mapNodeRange(vm._fragmentStart, vm._fragmentEnd, function (node) {
-          op(node, target, vm);
-        });
-        cb && cb();
-      } else {
-        op(vm.$el, target, vm, cb);
-      }
-      if (shouldCallHook) {
-        vm._callHook('attached');
-      }
-      return vm;
-    }
-
-    /**
-     * Check for selectors
-     *
-     * @param {String|Element} el
-     */
-
-    function query(el) {
-      return typeof el === 'string' ? document.querySelector(el) : el;
-    }
-
-    /**
-     * Append operation that takes a callback.
-     *
-     * @param {Node} el
-     * @param {Node} target
-     * @param {Vue} vm - unused
-     * @param {Function} [cb]
-     */
-
-    function append(el, target, vm, cb) {
-      target.appendChild(el);
-      if (cb) cb();
-    }
-
-    /**
-     * InsertBefore operation that takes a callback.
-     *
-     * @param {Node} el
-     * @param {Node} target
-     * @param {Vue} vm - unused
-     * @param {Function} [cb]
-     */
-
-    function beforeWithCb(el, target, vm, cb) {
-      before(el, target);
-      if (cb) cb();
-    }
-
-    /**
-     * Remove operation that takes a callback.
-     *
-     * @param {Node} el
-     * @param {Vue} vm - unused
-     * @param {Function} [cb]
-     */
-
-    function removeWithCb(el, vm, cb) {
-      remove(el);
-      if (cb) cb();
-    }
-  }
-
-  function eventsAPI (Vue) {
-    /**
-     * Listen on the given `event` with `fn`.
-     *
-     * @param {String} event
-     * @param {Function} fn
-     */
-
-    Vue.prototype.$on = function (event, fn) {
-      (this._events[event] || (this._events[event] = [])).push(fn);
-      modifyListenerCount(this, event, 1);
-      return this;
-    };
-
-    /**
-     * Adds an `event` listener that will be invoked a single
-     * time then automatically removed.
-     *
-     * @param {String} event
-     * @param {Function} fn
-     */
-
-    Vue.prototype.$once = function (event, fn) {
-      var self = this;
-      function on() {
-        self.$off(event, on);
-        fn.apply(this, arguments);
-      }
-      on.fn = fn;
-      this.$on(event, on);
-      return this;
-    };
-
-    /**
-     * Remove the given callback for `event` or all
-     * registered callbacks.
-     *
-     * @param {String} event
-     * @param {Function} fn
-     */
-
-    Vue.prototype.$off = function (event, fn) {
-      var cbs;
-      // all
-      if (!arguments.length) {
-        if (this.$parent) {
-          for (event in this._events) {
-            cbs = this._events[event];
-            if (cbs) {
-              modifyListenerCount(this, event, -cbs.length);
-            }
-          }
-        }
-        this._events = {};
-        return this;
-      }
-      // specific event
-      cbs = this._events[event];
-      if (!cbs) {
-        return this;
-      }
-      if (arguments.length === 1) {
-        modifyListenerCount(this, event, -cbs.length);
-        this._events[event] = null;
-        return this;
-      }
-      // specific handler
-      var cb;
-      var i = cbs.length;
-      while (i--) {
-        cb = cbs[i];
-        if (cb === fn || cb.fn === fn) {
-          modifyListenerCount(this, event, -1);
-          cbs.splice(i, 1);
-          break;
-        }
-      }
-      return this;
-    };
-
-    /**
-     * Trigger an event on self.
-     *
-     * @param {String|Object} event
-     * @return {Boolean} shouldPropagate
-     */
-
-    Vue.prototype.$emit = function (event) {
-      var isSource = typeof event === 'string';
-      event = isSource ? event : event.name;
-      var cbs = this._events[event];
-      var shouldPropagate = isSource || !cbs;
-      if (cbs) {
-        cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-        // this is a somewhat hacky solution to the question raised
-        // in #2102: for an inline component listener like <comp @test="doThis">,
-        // the propagation handling is somewhat broken. Therefore we
-        // need to treat these inline callbacks differently.
-        var hasParentCbs = isSource && cbs.some(function (cb) {
-          return cb._fromParent;
-        });
-        if (hasParentCbs) {
-          shouldPropagate = false;
-        }
-        var args = toArray(arguments, 1);
-        for (var i = 0, l = cbs.length; i < l; i++) {
-          var cb = cbs[i];
-          var res = cb.apply(this, args);
-          if (res === true && (!hasParentCbs || cb._fromParent)) {
-            shouldPropagate = true;
-          }
-        }
-      }
-      return shouldPropagate;
-    };
-
-    /**
-     * Recursively broadcast an event to all children instances.
-     *
-     * @param {String|Object} event
-     * @param {...*} additional arguments
-     */
-
-    Vue.prototype.$broadcast = function (event) {
-      var isSource = typeof event === 'string';
-      event = isSource ? event : event.name;
-      // if no child has registered for this event,
-      // then there's no need to broadcast.
-      if (!this._eventsCount[event]) return;
-      var children = this.$children;
-      var args = toArray(arguments);
-      if (isSource) {
-        // use object event to indicate non-source emit
-        // on children
-        args[0] = { name: event, source: this };
-      }
-      for (var i = 0, l = children.length; i < l; i++) {
-        var child = children[i];
-        var shouldPropagate = child.$emit.apply(child, args);
-        if (shouldPropagate) {
-          child.$broadcast.apply(child, args);
-        }
-      }
-      return this;
-    };
-
-    /**
-     * Recursively propagate an event up the parent chain.
-     *
-     * @param {String} event
-     * @param {...*} additional arguments
-     */
-
-    Vue.prototype.$dispatch = function (event) {
-      var shouldPropagate = this.$emit.apply(this, arguments);
-      if (!shouldPropagate) return;
-      var parent = this.$parent;
-      var args = toArray(arguments);
-      // use object event to indicate non-source emit
-      // on parents
-      args[0] = { name: event, source: this };
-      while (parent) {
-        shouldPropagate = parent.$emit.apply(parent, args);
-        parent = shouldPropagate ? parent.$parent : null;
-      }
-      return this;
-    };
-
-    /**
-     * Modify the listener counts on all parents.
-     * This bookkeeping allows $broadcast to return early when
-     * no child has listened to a certain event.
-     *
-     * @param {Vue} vm
-     * @param {String} event
-     * @param {Number} count
-     */
-
-    var hookRE = /^hook:/;
-    function modifyListenerCount(vm, event, count) {
-      var parent = vm.$parent;
-      // hooks do not get broadcasted so no need
-      // to do bookkeeping for them
-      if (!parent || !count || hookRE.test(event)) return;
-      while (parent) {
-        parent._eventsCount[event] = (parent._eventsCount[event] || 0) + count;
-        parent = parent.$parent;
-      }
-    }
-  }
-
-  function lifecycleAPI (Vue) {
-    /**
-     * Set instance target element and kick off the compilation
-     * process. The passed in `el` can be a selector string, an
-     * existing Element, or a DocumentFragment (for block
-     * instances).
-     *
-     * @param {Element|DocumentFragment|string} el
-     * @public
-     */
-
-    Vue.prototype.$mount = function (el) {
-      if (this._isCompiled) {
-        'development' !== 'production' && warn('$mount() should be called only once.', this);
-        return;
-      }
-      el = query(el);
-      if (!el) {
-        el = document.createElement('div');
-      }
-      this._compile(el);
-      this._initDOMHooks();
-      if (inDoc(this.$el)) {
-        this._callHook('attached');
-        ready.call(this);
-      } else {
-        this.$once('hook:attached', ready);
-      }
-      return this;
-    };
-
-    /**
-     * Mark an instance as ready.
-     */
-
-    function ready() {
-      this._isAttached = true;
-      this._isReady = true;
-      this._callHook('ready');
-    }
-
-    /**
-     * Teardown the instance, simply delegate to the internal
-     * _destroy.
-     *
-     * @param {Boolean} remove
-     * @param {Boolean} deferCleanup
-     */
-
-    Vue.prototype.$destroy = function (remove, deferCleanup) {
-      this._destroy(remove, deferCleanup);
-    };
-
-    /**
-     * Partially compile a piece of DOM and return a
-     * decompile function.
-     *
-     * @param {Element|DocumentFragment} el
-     * @param {Vue} [host]
-     * @param {Object} [scope]
-     * @param {Fragment} [frag]
-     * @return {Function}
-     */
-
-    Vue.prototype.$compile = function (el, host, scope, frag) {
-      return compile(el, this.$options, true)(this, el, host, scope, frag);
     };
   }
 
-  /**
-   * The exposed Vue constructor.
-   *
-   * API conventions:
-   * - public API methods/properties are prefixed with `$`
-   * - internal methods/properties are prefixed with `_`
-   * - non-prefixed properties are assumed to be proxied user
-   *   data.
-   *
-   * @constructor
-   * @param {Object} [options]
-   * @public
-   */
+  function initInternalComponent (vm, options) {
+    var opts = vm.$options = Object.create(vm.constructor.options);
+    // doing this because it's faster than dynamic enumeration.
+    var parentVnode = options._parentVnode;
+    opts.parent = options.parent;
+    opts._parentVnode = parentVnode;
 
-  function Vue(options) {
+    var vnodeComponentOptions = parentVnode.componentOptions;
+    opts.propsData = vnodeComponentOptions.propsData;
+    opts._parentListeners = vnodeComponentOptions.listeners;
+    opts._renderChildren = vnodeComponentOptions.children;
+    opts._componentTag = vnodeComponentOptions.tag;
+
+    if (options.render) {
+      opts.render = options.render;
+      opts.staticRenderFns = options.staticRenderFns;
+    }
+  }
+
+  function resolveConstructorOptions (Ctor) {
+    var options = Ctor.options;
+    if (Ctor.super) {
+      var superOptions = resolveConstructorOptions(Ctor.super);
+      var cachedSuperOptions = Ctor.superOptions;
+      if (superOptions !== cachedSuperOptions) {
+        // super option changed,
+        // need to resolve new options.
+        Ctor.superOptions = superOptions;
+        // check if there are any late-modified/attached options (#4976)
+        var modifiedOptions = resolveModifiedOptions(Ctor);
+        // update base extend options
+        if (modifiedOptions) {
+          extend(Ctor.extendOptions, modifiedOptions);
+        }
+        options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+        if (options.name) {
+          options.components[options.name] = Ctor;
+        }
+      }
+    }
+    return options
+  }
+
+  function resolveModifiedOptions (Ctor) {
+    var modified;
+    var latest = Ctor.options;
+    var sealed = Ctor.sealedOptions;
+    for (var key in latest) {
+      if (latest[key] !== sealed[key]) {
+        if (!modified) { modified = {}; }
+        modified[key] = latest[key];
+      }
+    }
+    return modified
+  }
+
+  function Vue (options) {
+    if (!(this instanceof Vue)
+    ) {
+      warn('Vue is a constructor and should be called with the `new` keyword');
+    }
     this._init(options);
   }
 
-  // install internals
   initMixin(Vue);
   stateMixin(Vue);
   eventsMixin(Vue);
   lifecycleMixin(Vue);
-  miscMixin(Vue);
+  renderMixin(Vue);
 
-  // install instance APIs
-  dataAPI(Vue);
-  domAPI(Vue);
-  eventsAPI(Vue);
-  lifecycleAPI(Vue);
+  /*  */
 
-  var slot = {
-
-    priority: SLOT,
-    params: ['name'],
-
-    bind: function bind() {
-      // this was resolved during component transclusion
-      var name = this.params.name || 'default';
-      var content = this.vm._slotContents && this.vm._slotContents[name];
-      if (!content || !content.hasChildNodes()) {
-        this.fallback();
-      } else {
-        this.compile(content.cloneNode(true), this.vm._context, this.vm);
+  function initUse (Vue) {
+    Vue.use = function (plugin) {
+      var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+      if (installedPlugins.indexOf(plugin) > -1) {
+        return this
       }
-    },
 
-    compile: function compile(content, context, host) {
-      if (content && context) {
-        if (this.el.hasChildNodes() && content.childNodes.length === 1 && content.childNodes[0].nodeType === 1 && content.childNodes[0].hasAttribute('v-if')) {
-          // if the inserted slot has v-if
-          // inject fallback content as the v-else
-          var elseBlock = document.createElement('template');
-          elseBlock.setAttribute('v-else', '');
-          elseBlock.innerHTML = this.el.innerHTML;
-          // the else block should be compiled in child scope
-          elseBlock._context = this.vm;
-          content.appendChild(elseBlock);
-        }
-        var scope = host ? host._scope : this._scope;
-        this.unlink = context.$compile(content, host, scope, this._frag);
-      }
-      if (content) {
-        replace(this.el, content);
-      } else {
-        remove(this.el);
-      }
-    },
-
-    fallback: function fallback() {
-      this.compile(extractContent(this.el, true), this.vm);
-    },
-
-    unbind: function unbind() {
-      if (this.unlink) {
-        this.unlink();
-      }
-    }
-  };
-
-  var partial = {
-
-    priority: PARTIAL,
-
-    params: ['name'],
-
-    // watch changes to name for dynamic partials
-    paramWatchers: {
-      name: function name(value) {
-        vIf.remove.call(this);
-        if (value) {
-          this.insert(value);
-        }
-      }
-    },
-
-    bind: function bind() {
-      this.anchor = createAnchor('v-partial');
-      replace(this.el, this.anchor);
-      this.insert(this.params.name);
-    },
-
-    insert: function insert(id) {
-      var partial = resolveAsset(this.vm.$options, 'partials', id, true);
-      if (partial) {
-        this.factory = new FragmentFactory(this.vm, partial);
-        vIf.insert.call(this);
-      }
-    },
-
-    unbind: function unbind() {
-      if (this.frag) {
-        this.frag.destroy();
-      }
-    }
-  };
-
-  var elementDirectives = {
-    slot: slot,
-    partial: partial
-  };
-
-  var convertArray = vFor._postProcess;
-
-  /**
-   * Limit filter for arrays
-   *
-   * @param {Number} n
-   * @param {Number} offset (Decimal expected)
-   */
-
-  function limitBy(arr, n, offset) {
-    offset = offset ? parseInt(offset, 10) : 0;
-    n = toNumber(n);
-    return typeof n === 'number' ? arr.slice(offset, offset + n) : arr;
-  }
-
-  /**
-   * Filter filter for arrays
-   *
-   * @param {String} search
-   * @param {String} [delimiter]
-   * @param {String} ...dataKeys
-   */
-
-  function filterBy(arr, search, delimiter) {
-    arr = convertArray(arr);
-    if (search == null) {
-      return arr;
-    }
-    if (typeof search === 'function') {
-      return arr.filter(search);
-    }
-    // cast to lowercase string
-    search = ('' + search).toLowerCase();
-    // allow optional `in` delimiter
-    // because why not
-    var n = delimiter === 'in' ? 3 : 2;
-    // extract and flatten keys
-    var keys = Array.prototype.concat.apply([], toArray(arguments, n));
-    var res = [];
-    var item, key, val, j;
-    for (var i = 0, l = arr.length; i < l; i++) {
-      item = arr[i];
-      val = item && item.$value || item;
-      j = keys.length;
-      if (j) {
-        while (j--) {
-          key = keys[j];
-          if (key === '$key' && contains(item.$key, search) || contains(getPath(val, key), search)) {
-            res.push(item);
-            break;
-          }
-        }
-      } else if (contains(item, search)) {
-        res.push(item);
-      }
-    }
-    return res;
-  }
-
-  /**
-   * Filter filter for arrays
-   *
-   * @param {String|Array<String>|Function} ...sortKeys
-   * @param {Number} [order]
-   */
-
-  function orderBy(arr) {
-    var comparator = null;
-    var sortKeys = undefined;
-    arr = convertArray(arr);
-
-    // determine order (last argument)
-    var args = toArray(arguments, 1);
-    var order = args[args.length - 1];
-    if (typeof order === 'number') {
-      order = order < 0 ? -1 : 1;
-      args = args.length > 1 ? args.slice(0, -1) : args;
-    } else {
-      order = 1;
-    }
-
-    // determine sortKeys & comparator
-    var firstArg = args[0];
-    if (!firstArg) {
-      return arr;
-    } else if (typeof firstArg === 'function') {
-      // custom comparator
-      comparator = function (a, b) {
-        return firstArg(a, b) * order;
-      };
-    } else {
-      // string keys. flatten first
-      sortKeys = Array.prototype.concat.apply([], args);
-      comparator = function (a, b, i) {
-        i = i || 0;
-        return i >= sortKeys.length - 1 ? baseCompare(a, b, i) : baseCompare(a, b, i) || comparator(a, b, i + 1);
-      };
-    }
-
-    function baseCompare(a, b, sortKeyIndex) {
-      var sortKey = sortKeys[sortKeyIndex];
-      if (sortKey) {
-        if (sortKey !== '$key') {
-          if (isObject(a) && '$value' in a) a = a.$value;
-          if (isObject(b) && '$value' in b) b = b.$value;
-        }
-        a = isObject(a) ? getPath(a, sortKey) : a;
-        b = isObject(b) ? getPath(b, sortKey) : b;
-      }
-      return a === b ? 0 : a > b ? order : -order;
-    }
-
-    // sort on a copy to avoid mutating original array
-    return arr.slice().sort(comparator);
-  }
-
-  /**
-   * String contain helper
-   *
-   * @param {*} val
-   * @param {String} search
-   */
-
-  function contains(val, search) {
-    var i;
-    if (isPlainObject(val)) {
-      var keys = Object.keys(val);
-      i = keys.length;
-      while (i--) {
-        if (contains(val[keys[i]], search)) {
-          return true;
-        }
-      }
-    } else if (isArray(val)) {
-      i = val.length;
-      while (i--) {
-        if (contains(val[i], search)) {
-          return true;
-        }
-      }
-    } else if (val != null) {
-      return val.toString().toLowerCase().indexOf(search) > -1;
-    }
-  }
-
-  var digitsRE = /(\d{3})(?=\d)/g;
-
-  // asset collections must be a plain object.
-  var filters = {
-
-    orderBy: orderBy,
-    filterBy: filterBy,
-    limitBy: limitBy,
-
-    /**
-     * Stringify value.
-     *
-     * @param {Number} indent
-     */
-
-    json: {
-      read: function read(value, indent) {
-        return typeof value === 'string' ? value : JSON.stringify(value, null, arguments.length > 1 ? indent : 2);
-      },
-      write: function write(value) {
-        try {
-          return JSON.parse(value);
-        } catch (e) {
-          return value;
-        }
-      }
-    },
-
-    /**
-     * 'abc' => 'Abc'
-     */
-
-    capitalize: function capitalize(value) {
-      if (!value && value !== 0) return '';
-      value = value.toString();
-      return value.charAt(0).toUpperCase() + value.slice(1);
-    },
-
-    /**
-     * 'abc' => 'ABC'
-     */
-
-    uppercase: function uppercase(value) {
-      return value || value === 0 ? value.toString().toUpperCase() : '';
-    },
-
-    /**
-     * 'AbC' => 'abc'
-     */
-
-    lowercase: function lowercase(value) {
-      return value || value === 0 ? value.toString().toLowerCase() : '';
-    },
-
-    /**
-     * 12345 => $12,345.00
-     *
-     * @param {String} sign
-     * @param {Number} decimals Decimal places
-     */
-
-    currency: function currency(value, _currency, decimals) {
-      value = parseFloat(value);
-      if (!isFinite(value) || !value && value !== 0) return '';
-      _currency = _currency != null ? _currency : '$';
-      decimals = decimals != null ? decimals : 2;
-      var stringified = Math.abs(value).toFixed(decimals);
-      var _int = decimals ? stringified.slice(0, -1 - decimals) : stringified;
-      var i = _int.length % 3;
-      var head = i > 0 ? _int.slice(0, i) + (_int.length > 3 ? ',' : '') : '';
-      var _float = decimals ? stringified.slice(-1 - decimals) : '';
-      var sign = value < 0 ? '-' : '';
-      return sign + _currency + head + _int.slice(i).replace(digitsRE, '$1,') + _float;
-    },
-
-    /**
-     * 'item' => 'items'
-     *
-     * @params
-     *  an array of strings corresponding to
-     *  the single, double, triple ... forms of the word to
-     *  be pluralized. When the number to be pluralized
-     *  exceeds the length of the args, it will use the last
-     *  entry in the array.
-     *
-     *  e.g. ['single', 'double', 'triple', 'multiple']
-     */
-
-    pluralize: function pluralize(value) {
+      // additional parameters
       var args = toArray(arguments, 1);
-      var length = args.length;
-      if (length > 1) {
-        var index = value % 10 - 1;
-        return index in args ? args[index] : args[length - 1];
-      } else {
-        return args[0] + (value === 1 ? '' : 's');
+      args.unshift(this);
+      if (typeof plugin.install === 'function') {
+        plugin.install.apply(plugin, args);
+      } else if (typeof plugin === 'function') {
+        plugin.apply(null, args);
       }
-    },
-
-    /**
-     * Debounce a handler function.
-     *
-     * @param {Function} handler
-     * @param {Number} delay = 300
-     * @return {Function}
-     */
-
-    debounce: function debounce(handler, delay) {
-      if (!handler) return;
-      if (!delay) {
-        delay = 300;
-      }
-      return _debounce(handler, delay);
-    }
-  };
-
-  function installGlobalAPI (Vue) {
-    /**
-     * Vue and every constructor that extends Vue has an
-     * associated options object, which can be accessed during
-     * compilation steps as `this.constructor.options`.
-     *
-     * These can be seen as the default options of every
-     * Vue instance.
-     */
-
-    Vue.options = {
-      directives: directives,
-      elementDirectives: elementDirectives,
-      filters: filters,
-      transitions: {},
-      components: {},
-      partials: {},
-      replace: true
+      installedPlugins.push(plugin);
+      return this
     };
+  }
 
-    /**
-     * Expose useful internals
-     */
+  /*  */
 
-    Vue.util = util;
-    Vue.config = config;
-    Vue.set = set;
-    Vue['delete'] = del;
-    Vue.nextTick = nextTick;
-
-    /**
-     * The following are exposed for advanced usage / plugins
-     */
-
-    Vue.compiler = compiler;
-    Vue.FragmentFactory = FragmentFactory;
-    Vue.internalDirectives = internalDirectives;
-    Vue.parsers = {
-      path: path,
-      text: text,
-      template: template,
-      directive: directive,
-      expression: expression
+  function initMixin$1 (Vue) {
+    Vue.mixin = function (mixin) {
+      this.options = mergeOptions(this.options, mixin);
+      return this
     };
+  }
 
+  /*  */
+
+  function initExtend (Vue) {
     /**
      * Each instance constructor, including Vue, has a unique
      * cid. This enables us to create wrapped "child
      * constructors" for prototypal inheritance and cache them.
      */
-
     Vue.cid = 0;
     var cid = 1;
 
     /**
      * Class inheritance
-     *
-     * @param {Object} extendOptions
      */
-
     Vue.extend = function (extendOptions) {
       extendOptions = extendOptions || {};
       var Super = this;
-      var isFirstExtend = Super.cid === 0;
-      if (isFirstExtend && extendOptions._Ctor) {
-        return extendOptions._Ctor;
+      var SuperId = Super.cid;
+      var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+      if (cachedCtors[SuperId]) {
+        return cachedCtors[SuperId]
       }
+
       var name = extendOptions.name || Super.options.name;
-      if ('development' !== 'production') {
-        if (!/^[a-zA-Z][\w-]*$/.test(name)) {
-          warn('Invalid component name: "' + name + '". Component names ' + 'can only contain alphanumeric characaters and the hyphen.');
-          name = null;
-        }
+      if (name) {
+        validateComponentName(name);
       }
-      var Sub = createClass(name || 'VueComponent');
+
+      var Sub = function VueComponent (options) {
+        this._init(options);
+      };
       Sub.prototype = Object.create(Super.prototype);
       Sub.prototype.constructor = Sub;
       Sub.cid = cid++;
-      Sub.options = mergeOptions(Super.options, extendOptions);
+      Sub.options = mergeOptions(
+        Super.options,
+        extendOptions
+      );
       Sub['super'] = Super;
-      // allow further extension
+
+      // For props and computed properties, we define the proxy getters on
+      // the Vue instances at extension time, on the extended prototype. This
+      // avoids Object.defineProperty calls for each instance created.
+      if (Sub.options.props) {
+        initProps$1(Sub);
+      }
+      if (Sub.options.computed) {
+        initComputed$1(Sub);
+      }
+
+      // allow further extension/mixin/plugin usage
       Sub.extend = Super.extend;
+      Sub.mixin = Super.mixin;
+      Sub.use = Super.use;
+
       // create asset registers, so extended classes
       // can have their private assets too.
-      config._assetTypes.forEach(function (type) {
+      ASSET_TYPES.forEach(function (type) {
         Sub[type] = Super[type];
       });
       // enable recursive self-lookup
       if (name) {
         Sub.options.components[name] = Sub;
       }
+
+      // keep a reference to the super options at extension time.
+      // later at instantiation we can check if Super's options have
+      // been updated.
+      Sub.superOptions = Super.options;
+      Sub.extendOptions = extendOptions;
+      Sub.sealedOptions = extend({}, Sub.options);
+
       // cache constructor
-      if (isFirstExtend) {
-        extendOptions._Ctor = Sub;
-      }
-      return Sub;
+      cachedCtors[SuperId] = Sub;
+      return Sub
     };
+  }
 
-    /**
-     * A function that returns a sub-class constructor with the
-     * given name. This gives us much nicer output when
-     * logging instances in the console.
-     *
-     * @param {String} name
-     * @return {Function}
-     */
-
-    function createClass(name) {
-      /* eslint-disable no-new-func */
-      return new Function('return function ' + classify(name) + ' (options) { this._init(options) }')();
-      /* eslint-enable no-new-func */
+  function initProps$1 (Comp) {
+    var props = Comp.options.props;
+    for (var key in props) {
+      proxy(Comp.prototype, "_props", key);
     }
+  }
 
+  function initComputed$1 (Comp) {
+    var computed = Comp.options.computed;
+    for (var key in computed) {
+      defineComputed(Comp.prototype, key, computed[key]);
+    }
+  }
+
+  /*  */
+
+  function initAssetRegisters (Vue) {
     /**
-     * Plugin system
-     *
-     * @param {Object} plugin
+     * Create asset registration methods.
      */
-
-    Vue.use = function (plugin) {
-      /* istanbul ignore if */
-      if (plugin.installed) {
-        return;
-      }
-      // additional parameters
-      var args = toArray(arguments, 1);
-      args.unshift(this);
-      if (typeof plugin.install === 'function') {
-        plugin.install.apply(plugin, args);
-      } else {
-        plugin.apply(null, args);
-      }
-      plugin.installed = true;
-      return this;
-    };
-
-    /**
-     * Apply a global mixin by merging it into the default
-     * options.
-     */
-
-    Vue.mixin = function (mixin) {
-      Vue.options = mergeOptions(Vue.options, mixin);
-    };
-
-    /**
-     * Create asset registration methods with the following
-     * signature:
-     *
-     * @param {String} id
-     * @param {*} definition
-     */
-
-    config._assetTypes.forEach(function (type) {
-      Vue[type] = function (id, definition) {
+    ASSET_TYPES.forEach(function (type) {
+      Vue[type] = function (
+        id,
+        definition
+      ) {
         if (!definition) {
-          return this.options[type + 's'][id];
+          return this.options[type + 's'][id]
         } else {
           /* istanbul ignore if */
-          if ('development' !== 'production') {
-            if (type === 'component' && (commonTagRE.test(id) || reservedTagRE.test(id))) {
-              warn('Do not use built-in or reserved HTML elements as component ' + 'id: ' + id);
-            }
+          if (type === 'component') {
+            validateComponentName(id);
           }
           if (type === 'component' && isPlainObject(definition)) {
-            if (!definition.name) {
-              definition.name = id;
-            }
-            definition = Vue.extend(definition);
+            definition.name = definition.name || id;
+            definition = this.options._base.extend(definition);
+          }
+          if (type === 'directive' && typeof definition === 'function') {
+            definition = { bind: definition, update: definition };
           }
           this.options[type + 's'][id] = definition;
-          return definition;
+          return definition
         }
       };
     });
-
-    // expose internal transition API
-    extend(Vue.transition, transition);
   }
 
-  installGlobalAPI(Vue);
+  /*  */
 
-  Vue.version = '1.0.26';
+
+
+
+
+  function getComponentName (opts) {
+    return opts && (opts.Ctor.options.name || opts.tag)
+  }
+
+  function matches (pattern, name) {
+    if (Array.isArray(pattern)) {
+      return pattern.indexOf(name) > -1
+    } else if (typeof pattern === 'string') {
+      return pattern.split(',').indexOf(name) > -1
+    } else if (isRegExp(pattern)) {
+      return pattern.test(name)
+    }
+    /* istanbul ignore next */
+    return false
+  }
+
+  function pruneCache (keepAliveInstance, filter) {
+    var cache = keepAliveInstance.cache;
+    var keys = keepAliveInstance.keys;
+    var _vnode = keepAliveInstance._vnode;
+    for (var key in cache) {
+      var entry = cache[key];
+      if (entry) {
+        var name = entry.name;
+        if (name && !filter(name)) {
+          pruneCacheEntry(cache, key, keys, _vnode);
+        }
+      }
+    }
+  }
+
+  function pruneCacheEntry (
+    cache,
+    key,
+    keys,
+    current
+  ) {
+    var entry = cache[key];
+    if (entry && (!current || entry.tag !== current.tag)) {
+      entry.componentInstance.$destroy();
+    }
+    cache[key] = null;
+    remove(keys, key);
+  }
+
+  var patternTypes = [String, RegExp, Array];
+
+  var KeepAlive = {
+    name: 'keep-alive',
+    abstract: true,
+
+    props: {
+      include: patternTypes,
+      exclude: patternTypes,
+      max: [String, Number]
+    },
+
+    methods: {
+      cacheVNode: function cacheVNode() {
+        var ref = this;
+        var cache = ref.cache;
+        var keys = ref.keys;
+        var vnodeToCache = ref.vnodeToCache;
+        var keyToCache = ref.keyToCache;
+        if (vnodeToCache) {
+          var tag = vnodeToCache.tag;
+          var componentInstance = vnodeToCache.componentInstance;
+          var componentOptions = vnodeToCache.componentOptions;
+          cache[keyToCache] = {
+            name: getComponentName(componentOptions),
+            tag: tag,
+            componentInstance: componentInstance,
+          };
+          keys.push(keyToCache);
+          // prune oldest entry
+          if (this.max && keys.length > parseInt(this.max)) {
+            pruneCacheEntry(cache, keys[0], keys, this._vnode);
+          }
+          this.vnodeToCache = null;
+        }
+      }
+    },
+
+    created: function created () {
+      this.cache = Object.create(null);
+      this.keys = [];
+    },
+
+    destroyed: function destroyed () {
+      for (var key in this.cache) {
+        pruneCacheEntry(this.cache, key, this.keys);
+      }
+    },
+
+    mounted: function mounted () {
+      var this$1 = this;
+
+      this.cacheVNode();
+      this.$watch('include', function (val) {
+        pruneCache(this$1, function (name) { return matches(val, name); });
+      });
+      this.$watch('exclude', function (val) {
+        pruneCache(this$1, function (name) { return !matches(val, name); });
+      });
+    },
+
+    updated: function updated () {
+      this.cacheVNode();
+    },
+
+    render: function render () {
+      var slot = this.$slots.default;
+      var vnode = getFirstComponentChild(slot);
+      var componentOptions = vnode && vnode.componentOptions;
+      if (componentOptions) {
+        // check pattern
+        var name = getComponentName(componentOptions);
+        var ref = this;
+        var include = ref.include;
+        var exclude = ref.exclude;
+        if (
+          // not included
+          (include && (!name || !matches(include, name))) ||
+          // excluded
+          (exclude && name && matches(exclude, name))
+        ) {
+          return vnode
+        }
+
+        var ref$1 = this;
+        var cache = ref$1.cache;
+        var keys = ref$1.keys;
+        var key = vnode.key == null
+          // same constructor may get registered as different local components
+          // so cid alone is not enough (#3269)
+          ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+          : vnode.key;
+        if (cache[key]) {
+          vnode.componentInstance = cache[key].componentInstance;
+          // make current key freshest
+          remove(keys, key);
+          keys.push(key);
+        } else {
+          // delay setting the cache until update
+          this.vnodeToCache = vnode;
+          this.keyToCache = key;
+        }
+
+        vnode.data.keepAlive = true;
+      }
+      return vnode || (slot && slot[0])
+    }
+  };
+
+  var builtInComponents = {
+    KeepAlive: KeepAlive
+  };
+
+  /*  */
+
+  function initGlobalAPI (Vue) {
+    // config
+    var configDef = {};
+    configDef.get = function () { return config; };
+    {
+      configDef.set = function () {
+        warn(
+          'Do not replace the Vue.config object, set individual fields instead.'
+        );
+      };
+    }
+    Object.defineProperty(Vue, 'config', configDef);
+
+    // exposed util methods.
+    // NOTE: these are not considered part of the public API - avoid relying on
+    // them unless you are aware of the risk.
+    Vue.util = {
+      warn: warn,
+      extend: extend,
+      mergeOptions: mergeOptions,
+      defineReactive: defineReactive$$1
+    };
+
+    Vue.set = set;
+    Vue.delete = del;
+    Vue.nextTick = nextTick;
+
+    // 2.6 explicit observable API
+    Vue.observable = function (obj) {
+      observe(obj);
+      return obj
+    };
+
+    Vue.options = Object.create(null);
+    ASSET_TYPES.forEach(function (type) {
+      Vue.options[type + 's'] = Object.create(null);
+    });
+
+    // this is used to identify the "base" constructor to extend all plain-object
+    // components with in Weex's multi-instance scenarios.
+    Vue.options._base = Vue;
+
+    extend(Vue.options.components, builtInComponents);
+
+    initUse(Vue);
+    initMixin$1(Vue);
+    initExtend(Vue);
+    initAssetRegisters(Vue);
+  }
+
+  initGlobalAPI(Vue);
+
+  Object.defineProperty(Vue.prototype, '$isServer', {
+    get: isServerRendering
+  });
+
+  Object.defineProperty(Vue.prototype, '$ssrContext', {
+    get: function get () {
+      /* istanbul ignore next */
+      return this.$vnode && this.$vnode.ssrContext
+    }
+  });
+
+  // expose FunctionalRenderContext for ssr runtime helper installation
+  Object.defineProperty(Vue, 'FunctionalRenderContext', {
+    value: FunctionalRenderContext
+  });
+
+  Vue.version = '2.6.14';
+
+  /*  */
+
+  // these are reserved for web because they are directly compiled away
+  // during template compilation
+  var isReservedAttr = makeMap('style,class');
+
+  // attributes that should be using props for binding
+  var acceptValue = makeMap('input,textarea,option,select,progress');
+  var mustUseProp = function (tag, type, attr) {
+    return (
+      (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+      (attr === 'selected' && tag === 'option') ||
+      (attr === 'checked' && tag === 'input') ||
+      (attr === 'muted' && tag === 'video')
+    )
+  };
+
+  var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+  var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+  var convertEnumeratedValue = function (key, value) {
+    return isFalsyAttrValue(value) || value === 'false'
+      ? 'false'
+      // allow arbitrary string value for contenteditable
+      : key === 'contenteditable' && isValidContentEditableValue(value)
+        ? value
+        : 'true'
+  };
+
+  var isBooleanAttr = makeMap(
+    'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+    'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+    'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+    'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+    'required,reversed,scoped,seamless,selected,sortable,' +
+    'truespeed,typemustmatch,visible'
+  );
+
+  var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+  var isXlink = function (name) {
+    return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+  };
+
+  var getXlinkProp = function (name) {
+    return isXlink(name) ? name.slice(6, name.length) : ''
+  };
+
+  var isFalsyAttrValue = function (val) {
+    return val == null || val === false
+  };
+
+  /*  */
+
+  function genClassForVnode (vnode) {
+    var data = vnode.data;
+    var parentNode = vnode;
+    var childNode = vnode;
+    while (isDef(childNode.componentInstance)) {
+      childNode = childNode.componentInstance._vnode;
+      if (childNode && childNode.data) {
+        data = mergeClassData(childNode.data, data);
+      }
+    }
+    while (isDef(parentNode = parentNode.parent)) {
+      if (parentNode && parentNode.data) {
+        data = mergeClassData(data, parentNode.data);
+      }
+    }
+    return renderClass(data.staticClass, data.class)
+  }
+
+  function mergeClassData (child, parent) {
+    return {
+      staticClass: concat(child.staticClass, parent.staticClass),
+      class: isDef(child.class)
+        ? [child.class, parent.class]
+        : parent.class
+    }
+  }
+
+  function renderClass (
+    staticClass,
+    dynamicClass
+  ) {
+    if (isDef(staticClass) || isDef(dynamicClass)) {
+      return concat(staticClass, stringifyClass(dynamicClass))
+    }
+    /* istanbul ignore next */
+    return ''
+  }
+
+  function concat (a, b) {
+    return a ? b ? (a + ' ' + b) : a : (b || '')
+  }
+
+  function stringifyClass (value) {
+    if (Array.isArray(value)) {
+      return stringifyArray(value)
+    }
+    if (isObject(value)) {
+      return stringifyObject(value)
+    }
+    if (typeof value === 'string') {
+      return value
+    }
+    /* istanbul ignore next */
+    return ''
+  }
+
+  function stringifyArray (value) {
+    var res = '';
+    var stringified;
+    for (var i = 0, l = value.length; i < l; i++) {
+      if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+        if (res) { res += ' '; }
+        res += stringified;
+      }
+    }
+    return res
+  }
+
+  function stringifyObject (value) {
+    var res = '';
+    for (var key in value) {
+      if (value[key]) {
+        if (res) { res += ' '; }
+        res += key;
+      }
+    }
+    return res
+  }
+
+  /*  */
+
+  var namespaceMap = {
+    svg: 'http://www.w3.org/2000/svg',
+    math: 'http://www.w3.org/1998/Math/MathML'
+  };
+
+  var isHTMLTag = makeMap(
+    'html,body,base,head,link,meta,style,title,' +
+    'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+    'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+    'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+    's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+    'embed,object,param,source,canvas,script,noscript,del,ins,' +
+    'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+    'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+    'output,progress,select,textarea,' +
+    'details,dialog,menu,menuitem,summary,' +
+    'content,element,shadow,template,blockquote,iframe,tfoot'
+  );
+
+  // this map is intentionally selective, only covering SVG elements that may
+  // contain child elements.
+  var isSVG = makeMap(
+    'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+    'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+    'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+    true
+  );
+
+  var isPreTag = function (tag) { return tag === 'pre'; };
+
+  var isReservedTag = function (tag) {
+    return isHTMLTag(tag) || isSVG(tag)
+  };
+
+  function getTagNamespace (tag) {
+    if (isSVG(tag)) {
+      return 'svg'
+    }
+    // basic support for MathML
+    // note it doesn't support other MathML elements being component roots
+    if (tag === 'math') {
+      return 'math'
+    }
+  }
+
+  var unknownElementCache = Object.create(null);
+  function isUnknownElement (tag) {
+    /* istanbul ignore if */
+    if (!inBrowser) {
+      return true
+    }
+    if (isReservedTag(tag)) {
+      return false
+    }
+    tag = tag.toLowerCase();
+    /* istanbul ignore if */
+    if (unknownElementCache[tag] != null) {
+      return unknownElementCache[tag]
+    }
+    var el = document.createElement(tag);
+    if (tag.indexOf('-') > -1) {
+      // http://stackoverflow.com/a/28210364/1070244
+      return (unknownElementCache[tag] = (
+        el.constructor === window.HTMLUnknownElement ||
+        el.constructor === window.HTMLElement
+      ))
+    } else {
+      return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+    }
+  }
+
+  var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+  /*  */
+
+  /**
+   * Query an element selector if it's not an element already.
+   */
+  function query (el) {
+    if (typeof el === 'string') {
+      var selected = document.querySelector(el);
+      if (!selected) {
+        warn(
+          'Cannot find element: ' + el
+        );
+        return document.createElement('div')
+      }
+      return selected
+    } else {
+      return el
+    }
+  }
+
+  /*  */
+
+  function createElement$1 (tagName, vnode) {
+    var elm = document.createElement(tagName);
+    if (tagName !== 'select') {
+      return elm
+    }
+    // false or null will remove the attribute but undefined will not
+    if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+      elm.setAttribute('multiple', 'multiple');
+    }
+    return elm
+  }
+
+  function createElementNS (namespace, tagName) {
+    return document.createElementNS(namespaceMap[namespace], tagName)
+  }
+
+  function createTextNode (text) {
+    return document.createTextNode(text)
+  }
+
+  function createComment (text) {
+    return document.createComment(text)
+  }
+
+  function insertBefore (parentNode, newNode, referenceNode) {
+    parentNode.insertBefore(newNode, referenceNode);
+  }
+
+  function removeChild (node, child) {
+    node.removeChild(child);
+  }
+
+  function appendChild (node, child) {
+    node.appendChild(child);
+  }
+
+  function parentNode (node) {
+    return node.parentNode
+  }
+
+  function nextSibling (node) {
+    return node.nextSibling
+  }
+
+  function tagName (node) {
+    return node.tagName
+  }
+
+  function setTextContent (node, text) {
+    node.textContent = text;
+  }
+
+  function setStyleScope (node, scopeId) {
+    node.setAttribute(scopeId, '');
+  }
+
+  var nodeOps = /*#__PURE__*/Object.freeze({
+    createElement: createElement$1,
+    createElementNS: createElementNS,
+    createTextNode: createTextNode,
+    createComment: createComment,
+    insertBefore: insertBefore,
+    removeChild: removeChild,
+    appendChild: appendChild,
+    parentNode: parentNode,
+    nextSibling: nextSibling,
+    tagName: tagName,
+    setTextContent: setTextContent,
+    setStyleScope: setStyleScope
+  });
+
+  /*  */
+
+  var ref = {
+    create: function create (_, vnode) {
+      registerRef(vnode);
+    },
+    update: function update (oldVnode, vnode) {
+      if (oldVnode.data.ref !== vnode.data.ref) {
+        registerRef(oldVnode, true);
+        registerRef(vnode);
+      }
+    },
+    destroy: function destroy (vnode) {
+      registerRef(vnode, true);
+    }
+  };
+
+  function registerRef (vnode, isRemoval) {
+    var key = vnode.data.ref;
+    if (!isDef(key)) { return }
+
+    var vm = vnode.context;
+    var ref = vnode.componentInstance || vnode.elm;
+    var refs = vm.$refs;
+    if (isRemoval) {
+      if (Array.isArray(refs[key])) {
+        remove(refs[key], ref);
+      } else if (refs[key] === ref) {
+        refs[key] = undefined;
+      }
+    } else {
+      if (vnode.data.refInFor) {
+        if (!Array.isArray(refs[key])) {
+          refs[key] = [ref];
+        } else if (refs[key].indexOf(ref) < 0) {
+          // $flow-disable-line
+          refs[key].push(ref);
+        }
+      } else {
+        refs[key] = ref;
+      }
+    }
+  }
+
+  /**
+   * Virtual DOM patching algorithm based on Snabbdom by
+   * Simon Friis Vindum (@paldepind)
+   * Licensed under the MIT License
+   * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+   *
+   * modified by Evan You (@yyx990803)
+   *
+   * Not type-checking this because this file is perf-critical and the cost
+   * of making flow understand it is not worth it.
+   */
+
+  var emptyNode = new VNode('', {}, []);
+
+  var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+  function sameVnode (a, b) {
+    return (
+      a.key === b.key &&
+      a.asyncFactory === b.asyncFactory && (
+        (
+          a.tag === b.tag &&
+          a.isComment === b.isComment &&
+          isDef(a.data) === isDef(b.data) &&
+          sameInputType(a, b)
+        ) || (
+          isTrue(a.isAsyncPlaceholder) &&
+          isUndef(b.asyncFactory.error)
+        )
+      )
+    )
+  }
+
+  function sameInputType (a, b) {
+    if (a.tag !== 'input') { return true }
+    var i;
+    var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+    var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+    return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+  }
+
+  function createKeyToOldIdx (children, beginIdx, endIdx) {
+    var i, key;
+    var map = {};
+    for (i = beginIdx; i <= endIdx; ++i) {
+      key = children[i].key;
+      if (isDef(key)) { map[key] = i; }
+    }
+    return map
+  }
+
+  function createPatchFunction (backend) {
+    var i, j;
+    var cbs = {};
+
+    var modules = backend.modules;
+    var nodeOps = backend.nodeOps;
+
+    for (i = 0; i < hooks.length; ++i) {
+      cbs[hooks[i]] = [];
+      for (j = 0; j < modules.length; ++j) {
+        if (isDef(modules[j][hooks[i]])) {
+          cbs[hooks[i]].push(modules[j][hooks[i]]);
+        }
+      }
+    }
+
+    function emptyNodeAt (elm) {
+      return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+    }
+
+    function createRmCb (childElm, listeners) {
+      function remove$$1 () {
+        if (--remove$$1.listeners === 0) {
+          removeNode(childElm);
+        }
+      }
+      remove$$1.listeners = listeners;
+      return remove$$1
+    }
+
+    function removeNode (el) {
+      var parent = nodeOps.parentNode(el);
+      // element may have already been removed due to v-html / v-text
+      if (isDef(parent)) {
+        nodeOps.removeChild(parent, el);
+      }
+    }
+
+    function isUnknownElement$$1 (vnode, inVPre) {
+      return (
+        !inVPre &&
+        !vnode.ns &&
+        !(
+          config.ignoredElements.length &&
+          config.ignoredElements.some(function (ignore) {
+            return isRegExp(ignore)
+              ? ignore.test(vnode.tag)
+              : ignore === vnode.tag
+          })
+        ) &&
+        config.isUnknownElement(vnode.tag)
+      )
+    }
+
+    var creatingElmInVPre = 0;
+
+    function createElm (
+      vnode,
+      insertedVnodeQueue,
+      parentElm,
+      refElm,
+      nested,
+      ownerArray,
+      index
+    ) {
+      if (isDef(vnode.elm) && isDef(ownerArray)) {
+        // This vnode was used in a previous render!
+        // now it's used as a new node, overwriting its elm would cause
+        // potential patch errors down the road when it's used as an insertion
+        // reference node. Instead, we clone the node on-demand before creating
+        // associated DOM element for it.
+        vnode = ownerArray[index] = cloneVNode(vnode);
+      }
+
+      vnode.isRootInsert = !nested; // for transition enter check
+      if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+        return
+      }
+
+      var data = vnode.data;
+      var children = vnode.children;
+      var tag = vnode.tag;
+      if (isDef(tag)) {
+        {
+          if (data && data.pre) {
+            creatingElmInVPre++;
+          }
+          if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+            warn(
+              'Unknown custom element: <' + tag + '> - did you ' +
+              'register the component correctly? For recursive components, ' +
+              'make sure to provide the "name" option.',
+              vnode.context
+            );
+          }
+        }
+
+        vnode.elm = vnode.ns
+          ? nodeOps.createElementNS(vnode.ns, tag)
+          : nodeOps.createElement(tag, vnode);
+        setScope(vnode);
+
+        /* istanbul ignore if */
+        {
+          createChildren(vnode, children, insertedVnodeQueue);
+          if (isDef(data)) {
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+          }
+          insert(parentElm, vnode.elm, refElm);
+        }
+
+        if (data && data.pre) {
+          creatingElmInVPre--;
+        }
+      } else if (isTrue(vnode.isComment)) {
+        vnode.elm = nodeOps.createComment(vnode.text);
+        insert(parentElm, vnode.elm, refElm);
+      } else {
+        vnode.elm = nodeOps.createTextNode(vnode.text);
+        insert(parentElm, vnode.elm, refElm);
+      }
+    }
+
+    function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+      var i = vnode.data;
+      if (isDef(i)) {
+        var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+        if (isDef(i = i.hook) && isDef(i = i.init)) {
+          i(vnode, false /* hydrating */);
+        }
+        // after calling the init hook, if the vnode is a child component
+        // it should've created a child instance and mounted it. the child
+        // component also has set the placeholder vnode's elm.
+        // in that case we can just return the element and be done.
+        if (isDef(vnode.componentInstance)) {
+          initComponent(vnode, insertedVnodeQueue);
+          insert(parentElm, vnode.elm, refElm);
+          if (isTrue(isReactivated)) {
+            reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+          }
+          return true
+        }
+      }
+    }
+
+    function initComponent (vnode, insertedVnodeQueue) {
+      if (isDef(vnode.data.pendingInsert)) {
+        insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+        vnode.data.pendingInsert = null;
+      }
+      vnode.elm = vnode.componentInstance.$el;
+      if (isPatchable(vnode)) {
+        invokeCreateHooks(vnode, insertedVnodeQueue);
+        setScope(vnode);
+      } else {
+        // empty component root.
+        // skip all element-related modules except for ref (#3455)
+        registerRef(vnode);
+        // make sure to invoke the insert hook
+        insertedVnodeQueue.push(vnode);
+      }
+    }
+
+    function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+      var i;
+      // hack for #4339: a reactivated component with inner transition
+      // does not trigger because the inner node's created hooks are not called
+      // again. It's not ideal to involve module-specific logic in here but
+      // there doesn't seem to be a better way to do it.
+      var innerNode = vnode;
+      while (innerNode.componentInstance) {
+        innerNode = innerNode.componentInstance._vnode;
+        if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+          for (i = 0; i < cbs.activate.length; ++i) {
+            cbs.activate[i](emptyNode, innerNode);
+          }
+          insertedVnodeQueue.push(innerNode);
+          break
+        }
+      }
+      // unlike a newly created component,
+      // a reactivated keep-alive component doesn't insert itself
+      insert(parentElm, vnode.elm, refElm);
+    }
+
+    function insert (parent, elm, ref$$1) {
+      if (isDef(parent)) {
+        if (isDef(ref$$1)) {
+          if (nodeOps.parentNode(ref$$1) === parent) {
+            nodeOps.insertBefore(parent, elm, ref$$1);
+          }
+        } else {
+          nodeOps.appendChild(parent, elm);
+        }
+      }
+    }
+
+    function createChildren (vnode, children, insertedVnodeQueue) {
+      if (Array.isArray(children)) {
+        {
+          checkDuplicateKeys(children);
+        }
+        for (var i = 0; i < children.length; ++i) {
+          createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+        }
+      } else if (isPrimitive(vnode.text)) {
+        nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+      }
+    }
+
+    function isPatchable (vnode) {
+      while (vnode.componentInstance) {
+        vnode = vnode.componentInstance._vnode;
+      }
+      return isDef(vnode.tag)
+    }
+
+    function invokeCreateHooks (vnode, insertedVnodeQueue) {
+      for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+        cbs.create[i$1](emptyNode, vnode);
+      }
+      i = vnode.data.hook; // Reuse variable
+      if (isDef(i)) {
+        if (isDef(i.create)) { i.create(emptyNode, vnode); }
+        if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+      }
+    }
+
+    // set scope id attribute for scoped CSS.
+    // this is implemented as a special case to avoid the overhead
+    // of going through the normal attribute patching process.
+    function setScope (vnode) {
+      var i;
+      if (isDef(i = vnode.fnScopeId)) {
+        nodeOps.setStyleScope(vnode.elm, i);
+      } else {
+        var ancestor = vnode;
+        while (ancestor) {
+          if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+            nodeOps.setStyleScope(vnode.elm, i);
+          }
+          ancestor = ancestor.parent;
+        }
+      }
+      // for slot content they should also get the scopeId from the host instance.
+      if (isDef(i = activeInstance) &&
+        i !== vnode.context &&
+        i !== vnode.fnContext &&
+        isDef(i = i.$options._scopeId)
+      ) {
+        nodeOps.setStyleScope(vnode.elm, i);
+      }
+    }
+
+    function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+      for (; startIdx <= endIdx; ++startIdx) {
+        createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+      }
+    }
+
+    function invokeDestroyHook (vnode) {
+      var i, j;
+      var data = vnode.data;
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+        for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+      }
+      if (isDef(i = vnode.children)) {
+        for (j = 0; j < vnode.children.length; ++j) {
+          invokeDestroyHook(vnode.children[j]);
+        }
+      }
+    }
+
+    function removeVnodes (vnodes, startIdx, endIdx) {
+      for (; startIdx <= endIdx; ++startIdx) {
+        var ch = vnodes[startIdx];
+        if (isDef(ch)) {
+          if (isDef(ch.tag)) {
+            removeAndInvokeRemoveHook(ch);
+            invokeDestroyHook(ch);
+          } else { // Text node
+            removeNode(ch.elm);
+          }
+        }
+      }
+    }
+
+    function removeAndInvokeRemoveHook (vnode, rm) {
+      if (isDef(rm) || isDef(vnode.data)) {
+        var i;
+        var listeners = cbs.remove.length + 1;
+        if (isDef(rm)) {
+          // we have a recursively passed down rm callback
+          // increase the listeners count
+          rm.listeners += listeners;
+        } else {
+          // directly removing
+          rm = createRmCb(vnode.elm, listeners);
+        }
+        // recursively invoke hooks on child component root node
+        if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+          removeAndInvokeRemoveHook(i, rm);
+        }
+        for (i = 0; i < cbs.remove.length; ++i) {
+          cbs.remove[i](vnode, rm);
+        }
+        if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+          i(vnode, rm);
+        } else {
+          rm();
+        }
+      } else {
+        removeNode(vnode.elm);
+      }
+    }
+
+    function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+      var oldStartIdx = 0;
+      var newStartIdx = 0;
+      var oldEndIdx = oldCh.length - 1;
+      var oldStartVnode = oldCh[0];
+      var oldEndVnode = oldCh[oldEndIdx];
+      var newEndIdx = newCh.length - 1;
+      var newStartVnode = newCh[0];
+      var newEndVnode = newCh[newEndIdx];
+      var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+
+      // removeOnly is a special flag used only by <transition-group>
+      // to ensure removed elements stay in correct relative positions
+      // during leaving transitions
+      var canMove = !removeOnly;
+
+      {
+        checkDuplicateKeys(newCh);
+      }
+
+      while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+        if (isUndef(oldStartVnode)) {
+          oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+        } else if (isUndef(oldEndVnode)) {
+          oldEndVnode = oldCh[--oldEndIdx];
+        } else if (sameVnode(oldStartVnode, newStartVnode)) {
+          patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+          oldStartVnode = oldCh[++oldStartIdx];
+          newStartVnode = newCh[++newStartIdx];
+        } else if (sameVnode(oldEndVnode, newEndVnode)) {
+          patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+          oldEndVnode = oldCh[--oldEndIdx];
+          newEndVnode = newCh[--newEndIdx];
+        } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+          patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+          canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+          oldStartVnode = oldCh[++oldStartIdx];
+          newEndVnode = newCh[--newEndIdx];
+        } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+          patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+          canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+          oldEndVnode = oldCh[--oldEndIdx];
+          newStartVnode = newCh[++newStartIdx];
+        } else {
+          if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+          idxInOld = isDef(newStartVnode.key)
+            ? oldKeyToIdx[newStartVnode.key]
+            : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+          if (isUndef(idxInOld)) { // New element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+          } else {
+            vnodeToMove = oldCh[idxInOld];
+            if (sameVnode(vnodeToMove, newStartVnode)) {
+              patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+              oldCh[idxInOld] = undefined;
+              canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+            } else {
+              // same key but different element. treat as new element
+              createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+            }
+          }
+          newStartVnode = newCh[++newStartIdx];
+        }
+      }
+      if (oldStartIdx > oldEndIdx) {
+        refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+        addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+      } else if (newStartIdx > newEndIdx) {
+        removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+      }
+    }
+
+    function checkDuplicateKeys (children) {
+      var seenKeys = {};
+      for (var i = 0; i < children.length; i++) {
+        var vnode = children[i];
+        var key = vnode.key;
+        if (isDef(key)) {
+          if (seenKeys[key]) {
+            warn(
+              ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+              vnode.context
+            );
+          } else {
+            seenKeys[key] = true;
+          }
+        }
+      }
+    }
+
+    function findIdxInOld (node, oldCh, start, end) {
+      for (var i = start; i < end; i++) {
+        var c = oldCh[i];
+        if (isDef(c) && sameVnode(node, c)) { return i }
+      }
+    }
+
+    function patchVnode (
+      oldVnode,
+      vnode,
+      insertedVnodeQueue,
+      ownerArray,
+      index,
+      removeOnly
+    ) {
+      if (oldVnode === vnode) {
+        return
+      }
+
+      if (isDef(vnode.elm) && isDef(ownerArray)) {
+        // clone reused vnode
+        vnode = ownerArray[index] = cloneVNode(vnode);
+      }
+
+      var elm = vnode.elm = oldVnode.elm;
+
+      if (isTrue(oldVnode.isAsyncPlaceholder)) {
+        if (isDef(vnode.asyncFactory.resolved)) {
+          hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+        } else {
+          vnode.isAsyncPlaceholder = true;
+        }
+        return
+      }
+
+      // reuse element for static trees.
+      // note we only do this if the vnode is cloned -
+      // if the new node is not cloned it means the render functions have been
+      // reset by the hot-reload-api and we need to do a proper re-render.
+      if (isTrue(vnode.isStatic) &&
+        isTrue(oldVnode.isStatic) &&
+        vnode.key === oldVnode.key &&
+        (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+      ) {
+        vnode.componentInstance = oldVnode.componentInstance;
+        return
+      }
+
+      var i;
+      var data = vnode.data;
+      if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+        i(oldVnode, vnode);
+      }
+
+      var oldCh = oldVnode.children;
+      var ch = vnode.children;
+      if (isDef(data) && isPatchable(vnode)) {
+        for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+        if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+      }
+      if (isUndef(vnode.text)) {
+        if (isDef(oldCh) && isDef(ch)) {
+          if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+        } else if (isDef(ch)) {
+          {
+            checkDuplicateKeys(ch);
+          }
+          if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+          addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+        } else if (isDef(oldCh)) {
+          removeVnodes(oldCh, 0, oldCh.length - 1);
+        } else if (isDef(oldVnode.text)) {
+          nodeOps.setTextContent(elm, '');
+        }
+      } else if (oldVnode.text !== vnode.text) {
+        nodeOps.setTextContent(elm, vnode.text);
+      }
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+      }
+    }
+
+    function invokeInsertHook (vnode, queue, initial) {
+      // delay insert hooks for component root nodes, invoke them after the
+      // element is really inserted
+      if (isTrue(initial) && isDef(vnode.parent)) {
+        vnode.parent.data.pendingInsert = queue;
+      } else {
+        for (var i = 0; i < queue.length; ++i) {
+          queue[i].data.hook.insert(queue[i]);
+        }
+      }
+    }
+
+    var hydrationBailed = false;
+    // list of modules that can skip create hook during hydration because they
+    // are already rendered on the client or has no need for initialization
+    // Note: style is excluded because it relies on initial clone for future
+    // deep updates (#7063).
+    var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+
+    // Note: this is a browser-only function so we can assume elms are DOM nodes.
+    function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+      var i;
+      var tag = vnode.tag;
+      var data = vnode.data;
+      var children = vnode.children;
+      inVPre = inVPre || (data && data.pre);
+      vnode.elm = elm;
+
+      if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+        vnode.isAsyncPlaceholder = true;
+        return true
+      }
+      // assert node match
+      {
+        if (!assertNodeMatch(elm, vnode, inVPre)) {
+          return false
+        }
+      }
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+        if (isDef(i = vnode.componentInstance)) {
+          // child component. it should have hydrated its own tree.
+          initComponent(vnode, insertedVnodeQueue);
+          return true
+        }
+      }
+      if (isDef(tag)) {
+        if (isDef(children)) {
+          // empty element, allow client to pick up and populate children
+          if (!elm.hasChildNodes()) {
+            createChildren(vnode, children, insertedVnodeQueue);
+          } else {
+            // v-html and domProps: innerHTML
+            if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+              if (i !== elm.innerHTML) {
+                /* istanbul ignore if */
+                if (typeof console !== 'undefined' &&
+                  !hydrationBailed
+                ) {
+                  hydrationBailed = true;
+                  console.warn('Parent: ', elm);
+                  console.warn('server innerHTML: ', i);
+                  console.warn('client innerHTML: ', elm.innerHTML);
+                }
+                return false
+              }
+            } else {
+              // iterate and compare children lists
+              var childrenMatch = true;
+              var childNode = elm.firstChild;
+              for (var i$1 = 0; i$1 < children.length; i$1++) {
+                if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                  childrenMatch = false;
+                  break
+                }
+                childNode = childNode.nextSibling;
+              }
+              // if childNode is not null, it means the actual childNodes list is
+              // longer than the virtual children list.
+              if (!childrenMatch || childNode) {
+                /* istanbul ignore if */
+                if (typeof console !== 'undefined' &&
+                  !hydrationBailed
+                ) {
+                  hydrationBailed = true;
+                  console.warn('Parent: ', elm);
+                  console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+                }
+                return false
+              }
+            }
+          }
+        }
+        if (isDef(data)) {
+          var fullInvoke = false;
+          for (var key in data) {
+            if (!isRenderedModule(key)) {
+              fullInvoke = true;
+              invokeCreateHooks(vnode, insertedVnodeQueue);
+              break
+            }
+          }
+          if (!fullInvoke && data['class']) {
+            // ensure collecting deps for deep class bindings for future updates
+            traverse(data['class']);
+          }
+        }
+      } else if (elm.data !== vnode.text) {
+        elm.data = vnode.text;
+      }
+      return true
+    }
+
+    function assertNodeMatch (node, vnode, inVPre) {
+      if (isDef(vnode.tag)) {
+        return vnode.tag.indexOf('vue-component') === 0 || (
+          !isUnknownElement$$1(vnode, inVPre) &&
+          vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+        )
+      } else {
+        return node.nodeType === (vnode.isComment ? 8 : 3)
+      }
+    }
+
+    return function patch (oldVnode, vnode, hydrating, removeOnly) {
+      if (isUndef(vnode)) {
+        if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+        return
+      }
+
+      var isInitialPatch = false;
+      var insertedVnodeQueue = [];
+
+      if (isUndef(oldVnode)) {
+        // empty mount (likely as component), create new root element
+        isInitialPatch = true;
+        createElm(vnode, insertedVnodeQueue);
+      } else {
+        var isRealElement = isDef(oldVnode.nodeType);
+        if (!isRealElement && sameVnode(oldVnode, vnode)) {
+          // patch existing root node
+          patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+        } else {
+          if (isRealElement) {
+            // mounting to a real element
+            // check if this is server-rendered content and if we can perform
+            // a successful hydration.
+            if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+              oldVnode.removeAttribute(SSR_ATTR);
+              hydrating = true;
+            }
+            if (isTrue(hydrating)) {
+              if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+                invokeInsertHook(vnode, insertedVnodeQueue, true);
+                return oldVnode
+              } else {
+                warn(
+                  'The client-side rendered virtual DOM tree is not matching ' +
+                  'server-rendered content. This is likely caused by incorrect ' +
+                  'HTML markup, for example nesting block-level elements inside ' +
+                  '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                  'full client-side render.'
+                );
+              }
+            }
+            // either not server-rendered, or hydration failed.
+            // create an empty node and replace it
+            oldVnode = emptyNodeAt(oldVnode);
+          }
+
+          // replacing existing element
+          var oldElm = oldVnode.elm;
+          var parentElm = nodeOps.parentNode(oldElm);
+
+          // create new node
+          createElm(
+            vnode,
+            insertedVnodeQueue,
+            // extremely rare edge case: do not insert if old element is in a
+            // leaving transition. Only happens when combining transition +
+            // keep-alive + HOCs. (#4590)
+            oldElm._leaveCb ? null : parentElm,
+            nodeOps.nextSibling(oldElm)
+          );
+
+          // update parent placeholder node element, recursively
+          if (isDef(vnode.parent)) {
+            var ancestor = vnode.parent;
+            var patchable = isPatchable(vnode);
+            while (ancestor) {
+              for (var i = 0; i < cbs.destroy.length; ++i) {
+                cbs.destroy[i](ancestor);
+              }
+              ancestor.elm = vnode.elm;
+              if (patchable) {
+                for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                  cbs.create[i$1](emptyNode, ancestor);
+                }
+                // #6513
+                // invoke insert hooks that may have been merged by create hooks.
+                // e.g. for directives that uses the "inserted" hook.
+                var insert = ancestor.data.hook.insert;
+                if (insert.merged) {
+                  // start at index 1 to avoid re-invoking component mounted hook
+                  for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                    insert.fns[i$2]();
+                  }
+                }
+              } else {
+                registerRef(ancestor);
+              }
+              ancestor = ancestor.parent;
+            }
+          }
+
+          // destroy old node
+          if (isDef(parentElm)) {
+            removeVnodes([oldVnode], 0, 0);
+          } else if (isDef(oldVnode.tag)) {
+            invokeDestroyHook(oldVnode);
+          }
+        }
+      }
+
+      invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+      return vnode.elm
+    }
+  }
+
+  /*  */
+
+  var directives = {
+    create: updateDirectives,
+    update: updateDirectives,
+    destroy: function unbindDirectives (vnode) {
+      updateDirectives(vnode, emptyNode);
+    }
+  };
+
+  function updateDirectives (oldVnode, vnode) {
+    if (oldVnode.data.directives || vnode.data.directives) {
+      _update(oldVnode, vnode);
+    }
+  }
+
+  function _update (oldVnode, vnode) {
+    var isCreate = oldVnode === emptyNode;
+    var isDestroy = vnode === emptyNode;
+    var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+    var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+
+    var dirsWithInsert = [];
+    var dirsWithPostpatch = [];
+
+    var key, oldDir, dir;
+    for (key in newDirs) {
+      oldDir = oldDirs[key];
+      dir = newDirs[key];
+      if (!oldDir) {
+        // new directive, bind
+        callHook$1(dir, 'bind', vnode, oldVnode);
+        if (dir.def && dir.def.inserted) {
+          dirsWithInsert.push(dir);
+        }
+      } else {
+        // existing directive, update
+        dir.oldValue = oldDir.value;
+        dir.oldArg = oldDir.arg;
+        callHook$1(dir, 'update', vnode, oldVnode);
+        if (dir.def && dir.def.componentUpdated) {
+          dirsWithPostpatch.push(dir);
+        }
+      }
+    }
+
+    if (dirsWithInsert.length) {
+      var callInsert = function () {
+        for (var i = 0; i < dirsWithInsert.length; i++) {
+          callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+        }
+      };
+      if (isCreate) {
+        mergeVNodeHook(vnode, 'insert', callInsert);
+      } else {
+        callInsert();
+      }
+    }
+
+    if (dirsWithPostpatch.length) {
+      mergeVNodeHook(vnode, 'postpatch', function () {
+        for (var i = 0; i < dirsWithPostpatch.length; i++) {
+          callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+        }
+      });
+    }
+
+    if (!isCreate) {
+      for (key in oldDirs) {
+        if (!newDirs[key]) {
+          // no longer present, unbind
+          callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+        }
+      }
+    }
+  }
+
+  var emptyModifiers = Object.create(null);
+
+  function normalizeDirectives$1 (
+    dirs,
+    vm
+  ) {
+    var res = Object.create(null);
+    if (!dirs) {
+      // $flow-disable-line
+      return res
+    }
+    var i, dir;
+    for (i = 0; i < dirs.length; i++) {
+      dir = dirs[i];
+      if (!dir.modifiers) {
+        // $flow-disable-line
+        dir.modifiers = emptyModifiers;
+      }
+      res[getRawDirName(dir)] = dir;
+      dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+    }
+    // $flow-disable-line
+    return res
+  }
+
+  function getRawDirName (dir) {
+    return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+  }
+
+  function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+    var fn = dir.def && dir.def[hook];
+    if (fn) {
+      try {
+        fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+      } catch (e) {
+        handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+      }
+    }
+  }
+
+  var baseModules = [
+    ref,
+    directives
+  ];
+
+  /*  */
+
+  function updateAttrs (oldVnode, vnode) {
+    var opts = vnode.componentOptions;
+    if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+      return
+    }
+    if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+      return
+    }
+    var key, cur, old;
+    var elm = vnode.elm;
+    var oldAttrs = oldVnode.data.attrs || {};
+    var attrs = vnode.data.attrs || {};
+    // clone observed objects, as the user probably wants to mutate it
+    if (isDef(attrs.__ob__)) {
+      attrs = vnode.data.attrs = extend({}, attrs);
+    }
+
+    for (key in attrs) {
+      cur = attrs[key];
+      old = oldAttrs[key];
+      if (old !== cur) {
+        setAttr(elm, key, cur, vnode.data.pre);
+      }
+    }
+    // #4391: in IE9, setting type can reset value for input[type=radio]
+    // #6666: IE/Edge forces progress value down to 1 before setting a max
+    /* istanbul ignore if */
+    if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+      setAttr(elm, 'value', attrs.value);
+    }
+    for (key in oldAttrs) {
+      if (isUndef(attrs[key])) {
+        if (isXlink(key)) {
+          elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+        } else if (!isEnumeratedAttr(key)) {
+          elm.removeAttribute(key);
+        }
+      }
+    }
+  }
+
+  function setAttr (el, key, value, isInPre) {
+    if (isInPre || el.tagName.indexOf('-') > -1) {
+      baseSetAttr(el, key, value);
+    } else if (isBooleanAttr(key)) {
+      // set attribute for blank value
+      // e.g. <option disabled>Select one</option>
+      if (isFalsyAttrValue(value)) {
+        el.removeAttribute(key);
+      } else {
+        // technically allowfullscreen is a boolean attribute for <iframe>,
+        // but Flash expects a value of "true" when used on <embed> tag
+        value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+          ? 'true'
+          : key;
+        el.setAttribute(key, value);
+      }
+    } else if (isEnumeratedAttr(key)) {
+      el.setAttribute(key, convertEnumeratedValue(key, value));
+    } else if (isXlink(key)) {
+      if (isFalsyAttrValue(value)) {
+        el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else {
+        el.setAttributeNS(xlinkNS, key, value);
+      }
+    } else {
+      baseSetAttr(el, key, value);
+    }
+  }
+
+  function baseSetAttr (el, key, value) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // #7138: IE10 & 11 fires input event when setting placeholder on
+      // <textarea>... block the first input event and remove the blocker
+      // immediately.
+      /* istanbul ignore if */
+      if (
+        isIE && !isIE9 &&
+        el.tagName === 'TEXTAREA' &&
+        key === 'placeholder' && value !== '' && !el.__ieph
+      ) {
+        var blocker = function (e) {
+          e.stopImmediatePropagation();
+          el.removeEventListener('input', blocker);
+        };
+        el.addEventListener('input', blocker);
+        // $flow-disable-line
+        el.__ieph = true; /* IE placeholder patched */
+      }
+      el.setAttribute(key, value);
+    }
+  }
+
+  var attrs = {
+    create: updateAttrs,
+    update: updateAttrs
+  };
+
+  /*  */
+
+  function updateClass (oldVnode, vnode) {
+    var el = vnode.elm;
+    var data = vnode.data;
+    var oldData = oldVnode.data;
+    if (
+      isUndef(data.staticClass) &&
+      isUndef(data.class) && (
+        isUndef(oldData) || (
+          isUndef(oldData.staticClass) &&
+          isUndef(oldData.class)
+        )
+      )
+    ) {
+      return
+    }
+
+    var cls = genClassForVnode(vnode);
+
+    // handle transition classes
+    var transitionClass = el._transitionClasses;
+    if (isDef(transitionClass)) {
+      cls = concat(cls, stringifyClass(transitionClass));
+    }
+
+    // set the class
+    if (cls !== el._prevClass) {
+      el.setAttribute('class', cls);
+      el._prevClass = cls;
+    }
+  }
+
+  var klass = {
+    create: updateClass,
+    update: updateClass
+  };
+
+  /*  */
+
+  var validDivisionCharRE = /[\w).+\-_$\]]/;
+
+  function parseFilters (exp) {
+    var inSingle = false;
+    var inDouble = false;
+    var inTemplateString = false;
+    var inRegex = false;
+    var curly = 0;
+    var square = 0;
+    var paren = 0;
+    var lastFilterIndex = 0;
+    var c, prev, i, expression, filters;
+
+    for (i = 0; i < exp.length; i++) {
+      prev = c;
+      c = exp.charCodeAt(i);
+      if (inSingle) {
+        if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
+      } else if (inDouble) {
+        if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
+      } else if (inTemplateString) {
+        if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
+      } else if (inRegex) {
+        if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
+      } else if (
+        c === 0x7C && // pipe
+        exp.charCodeAt(i + 1) !== 0x7C &&
+        exp.charCodeAt(i - 1) !== 0x7C &&
+        !curly && !square && !paren
+      ) {
+        if (expression === undefined) {
+          // first filter, end of expression
+          lastFilterIndex = i + 1;
+          expression = exp.slice(0, i).trim();
+        } else {
+          pushFilter();
+        }
+      } else {
+        switch (c) {
+          case 0x22: inDouble = true; break         // "
+          case 0x27: inSingle = true; break         // '
+          case 0x60: inTemplateString = true; break // `
+          case 0x28: paren++; break                 // (
+          case 0x29: paren--; break                 // )
+          case 0x5B: square++; break                // [
+          case 0x5D: square--; break                // ]
+          case 0x7B: curly++; break                 // {
+          case 0x7D: curly--; break                 // }
+        }
+        if (c === 0x2f) { // /
+          var j = i - 1;
+          var p = (void 0);
+          // find first non-whitespace prev char
+          for (; j >= 0; j--) {
+            p = exp.charAt(j);
+            if (p !== ' ') { break }
+          }
+          if (!p || !validDivisionCharRE.test(p)) {
+            inRegex = true;
+          }
+        }
+      }
+    }
+
+    if (expression === undefined) {
+      expression = exp.slice(0, i).trim();
+    } else if (lastFilterIndex !== 0) {
+      pushFilter();
+    }
+
+    function pushFilter () {
+      (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
+      lastFilterIndex = i + 1;
+    }
+
+    if (filters) {
+      for (i = 0; i < filters.length; i++) {
+        expression = wrapFilter(expression, filters[i]);
+      }
+    }
+
+    return expression
+  }
+
+  function wrapFilter (exp, filter) {
+    var i = filter.indexOf('(');
+    if (i < 0) {
+      // _f: resolveFilter
+      return ("_f(\"" + filter + "\")(" + exp + ")")
+    } else {
+      var name = filter.slice(0, i);
+      var args = filter.slice(i + 1);
+      return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
+    }
+  }
+
+  /*  */
+
+
+
+  /* eslint-disable no-unused-vars */
+  function baseWarn (msg, range) {
+    console.error(("[Vue compiler]: " + msg));
+  }
+  /* eslint-enable no-unused-vars */
+
+  function pluckModuleFunction (
+    modules,
+    key
+  ) {
+    return modules
+      ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
+      : []
+  }
+
+  function addProp (el, name, value, range, dynamic) {
+    (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+    el.plain = false;
+  }
+
+  function addAttr (el, name, value, range, dynamic) {
+    var attrs = dynamic
+      ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+      : (el.attrs || (el.attrs = []));
+    attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+    el.plain = false;
+  }
+
+  // add a raw attr (use this in preTransforms)
+  function addRawAttr (el, name, value, range) {
+    el.attrsMap[name] = value;
+    el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
+  }
+
+  function addDirective (
+    el,
+    name,
+    rawName,
+    value,
+    arg,
+    isDynamicArg,
+    modifiers,
+    range
+  ) {
+    (el.directives || (el.directives = [])).push(rangeSetItem({
+      name: name,
+      rawName: rawName,
+      value: value,
+      arg: arg,
+      isDynamicArg: isDynamicArg,
+      modifiers: modifiers
+    }, range));
+    el.plain = false;
+  }
+
+  function prependModifierMarker (symbol, name, dynamic) {
+    return dynamic
+      ? ("_p(" + name + ",\"" + symbol + "\")")
+      : symbol + name // mark the event as captured
+  }
+
+  function addHandler (
+    el,
+    name,
+    value,
+    modifiers,
+    important,
+    warn,
+    range,
+    dynamic
+  ) {
+    modifiers = modifiers || emptyObject;
+    // warn prevent and passive modifier
+    /* istanbul ignore if */
+    if (
+      warn &&
+      modifiers.prevent && modifiers.passive
+    ) {
+      warn(
+        'passive and prevent can\'t be used together. ' +
+        'Passive handler can\'t prevent default event.',
+        range
+      );
+    }
+
+    // normalize click.right and click.middle since they don't actually fire
+    // this is technically browser-specific, but at least for now browsers are
+    // the only target envs that have right/middle clicks.
+    if (modifiers.right) {
+      if (dynamic) {
+        name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+      } else if (name === 'click') {
+        name = 'contextmenu';
+        delete modifiers.right;
+      }
+    } else if (modifiers.middle) {
+      if (dynamic) {
+        name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+      } else if (name === 'click') {
+        name = 'mouseup';
+      }
+    }
+
+    // check capture modifier
+    if (modifiers.capture) {
+      delete modifiers.capture;
+      name = prependModifierMarker('!', name, dynamic);
+    }
+    if (modifiers.once) {
+      delete modifiers.once;
+      name = prependModifierMarker('~', name, dynamic);
+    }
+    /* istanbul ignore if */
+    if (modifiers.passive) {
+      delete modifiers.passive;
+      name = prependModifierMarker('&', name, dynamic);
+    }
+
+    var events;
+    if (modifiers.native) {
+      delete modifiers.native;
+      events = el.nativeEvents || (el.nativeEvents = {});
+    } else {
+      events = el.events || (el.events = {});
+    }
+
+    var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
+    if (modifiers !== emptyObject) {
+      newHandler.modifiers = modifiers;
+    }
+
+    var handlers = events[name];
+    /* istanbul ignore if */
+    if (Array.isArray(handlers)) {
+      important ? handlers.unshift(newHandler) : handlers.push(newHandler);
+    } else if (handlers) {
+      events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
+    } else {
+      events[name] = newHandler;
+    }
+
+    el.plain = false;
+  }
+
+  function getRawBindingAttr (
+    el,
+    name
+  ) {
+    return el.rawAttrsMap[':' + name] ||
+      el.rawAttrsMap['v-bind:' + name] ||
+      el.rawAttrsMap[name]
+  }
+
+  function getBindingAttr (
+    el,
+    name,
+    getStatic
+  ) {
+    var dynamicValue =
+      getAndRemoveAttr(el, ':' + name) ||
+      getAndRemoveAttr(el, 'v-bind:' + name);
+    if (dynamicValue != null) {
+      return parseFilters(dynamicValue)
+    } else if (getStatic !== false) {
+      var staticValue = getAndRemoveAttr(el, name);
+      if (staticValue != null) {
+        return JSON.stringify(staticValue)
+      }
+    }
+  }
+
+  // note: this only removes the attr from the Array (attrsList) so that it
+  // doesn't get processed by processAttrs.
+  // By default it does NOT remove it from the map (attrsMap) because the map is
+  // needed during codegen.
+  function getAndRemoveAttr (
+    el,
+    name,
+    removeFromMap
+  ) {
+    var val;
+    if ((val = el.attrsMap[name]) != null) {
+      var list = el.attrsList;
+      for (var i = 0, l = list.length; i < l; i++) {
+        if (list[i].name === name) {
+          list.splice(i, 1);
+          break
+        }
+      }
+    }
+    if (removeFromMap) {
+      delete el.attrsMap[name];
+    }
+    return val
+  }
+
+  function getAndRemoveAttrByRegex (
+    el,
+    name
+  ) {
+    var list = el.attrsList;
+    for (var i = 0, l = list.length; i < l; i++) {
+      var attr = list[i];
+      if (name.test(attr.name)) {
+        list.splice(i, 1);
+        return attr
+      }
+    }
+  }
+
+  function rangeSetItem (
+    item,
+    range
+  ) {
+    if (range) {
+      if (range.start != null) {
+        item.start = range.start;
+      }
+      if (range.end != null) {
+        item.end = range.end;
+      }
+    }
+    return item
+  }
+
+  /*  */
+
+  /**
+   * Cross-platform code generation for component v-model
+   */
+  function genComponentModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var ref = modifiers || {};
+    var number = ref.number;
+    var trim = ref.trim;
+
+    var baseValueExpression = '$$v';
+    var valueExpression = baseValueExpression;
+    if (trim) {
+      valueExpression =
+        "(typeof " + baseValueExpression + " === 'string'" +
+        "? " + baseValueExpression + ".trim()" +
+        ": " + baseValueExpression + ")";
+    }
+    if (number) {
+      valueExpression = "_n(" + valueExpression + ")";
+    }
+    var assignment = genAssignmentCode(value, valueExpression);
+
+    el.model = {
+      value: ("(" + value + ")"),
+      expression: JSON.stringify(value),
+      callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
+    };
+  }
+
+  /**
+   * Cross-platform codegen helper for generating v-model value assignment code.
+   */
+  function genAssignmentCode (
+    value,
+    assignment
+  ) {
+    var res = parseModel(value);
+    if (res.key === null) {
+      return (value + "=" + assignment)
+    } else {
+      return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
+    }
+  }
+
+  /**
+   * Parse a v-model expression into a base path and a final key segment.
+   * Handles both dot-path and possible square brackets.
+   *
+   * Possible cases:
+   *
+   * - test
+   * - test[key]
+   * - test[test1[key]]
+   * - test["a"][key]
+   * - xxx.test[a[a].test1[key]]
+   * - test.xxx.a["asa"][test1[key]]
+   *
+   */
+
+  var len, str, chr, index$1, expressionPos, expressionEndPos;
+
+
+
+  function parseModel (val) {
+    // Fix https://github.com/vuejs/vue/pull/7730
+    // allow v-model="obj.val " (trailing whitespace)
+    val = val.trim();
+    len = val.length;
+
+    if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
+      index$1 = val.lastIndexOf('.');
+      if (index$1 > -1) {
+        return {
+          exp: val.slice(0, index$1),
+          key: '"' + val.slice(index$1 + 1) + '"'
+        }
+      } else {
+        return {
+          exp: val,
+          key: null
+        }
+      }
+    }
+
+    str = val;
+    index$1 = expressionPos = expressionEndPos = 0;
+
+    while (!eof()) {
+      chr = next();
+      /* istanbul ignore if */
+      if (isStringStart(chr)) {
+        parseString(chr);
+      } else if (chr === 0x5B) {
+        parseBracket(chr);
+      }
+    }
+
+    return {
+      exp: val.slice(0, expressionPos),
+      key: val.slice(expressionPos + 1, expressionEndPos)
+    }
+  }
+
+  function next () {
+    return str.charCodeAt(++index$1)
+  }
+
+  function eof () {
+    return index$1 >= len
+  }
+
+  function isStringStart (chr) {
+    return chr === 0x22 || chr === 0x27
+  }
+
+  function parseBracket (chr) {
+    var inBracket = 1;
+    expressionPos = index$1;
+    while (!eof()) {
+      chr = next();
+      if (isStringStart(chr)) {
+        parseString(chr);
+        continue
+      }
+      if (chr === 0x5B) { inBracket++; }
+      if (chr === 0x5D) { inBracket--; }
+      if (inBracket === 0) {
+        expressionEndPos = index$1;
+        break
+      }
+    }
+  }
+
+  function parseString (chr) {
+    var stringQuote = chr;
+    while (!eof()) {
+      chr = next();
+      if (chr === stringQuote) {
+        break
+      }
+    }
+  }
+
+  /*  */
+
+  var warn$1;
+
+  // in some cases, the event used has to be determined at runtime
+  // so we used some reserved tokens during compile.
+  var RANGE_TOKEN = '__r';
+  var CHECKBOX_RADIO_TOKEN = '__c';
+
+  function model (
+    el,
+    dir,
+    _warn
+  ) {
+    warn$1 = _warn;
+    var value = dir.value;
+    var modifiers = dir.modifiers;
+    var tag = el.tag;
+    var type = el.attrsMap.type;
+
+    {
+      // inputs with type="file" are read only and setting the input's
+      // value will throw an error.
+      if (tag === 'input' && type === 'file') {
+        warn$1(
+          "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
+          "File inputs are read only. Use a v-on:change listener instead.",
+          el.rawAttrsMap['v-model']
+        );
+      }
+    }
+
+    if (el.component) {
+      genComponentModel(el, value, modifiers);
+      // component v-model doesn't need extra runtime
+      return false
+    } else if (tag === 'select') {
+      genSelect(el, value, modifiers);
+    } else if (tag === 'input' && type === 'checkbox') {
+      genCheckboxModel(el, value, modifiers);
+    } else if (tag === 'input' && type === 'radio') {
+      genRadioModel(el, value, modifiers);
+    } else if (tag === 'input' || tag === 'textarea') {
+      genDefaultModel(el, value, modifiers);
+    } else if (!config.isReservedTag(tag)) {
+      genComponentModel(el, value, modifiers);
+      // component v-model doesn't need extra runtime
+      return false
+    } else {
+      warn$1(
+        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+        "v-model is not supported on this element type. " +
+        'If you are working with contenteditable, it\'s recommended to ' +
+        'wrap a library dedicated for that purpose inside a custom component.',
+        el.rawAttrsMap['v-model']
+      );
+    }
+
+    // ensure runtime directive metadata
+    return true
+  }
+
+  function genCheckboxModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var valueBinding = getBindingAttr(el, 'value') || 'null';
+    var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
+    var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
+    addProp(el, 'checked',
+      "Array.isArray(" + value + ")" +
+      "?_i(" + value + "," + valueBinding + ")>-1" + (
+        trueValueBinding === 'true'
+          ? (":(" + value + ")")
+          : (":_q(" + value + "," + trueValueBinding + ")")
+      )
+    );
+    addHandler(el, 'change',
+      "var $$a=" + value + "," +
+          '$$el=$event.target,' +
+          "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
+      'if(Array.isArray($$a)){' +
+        "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
+            '$$i=_i($$a,$$v);' +
+        "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+        "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
+      "}else{" + (genAssignmentCode(value, '$$c')) + "}",
+      null, true
+    );
+  }
+
+  function genRadioModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var valueBinding = getBindingAttr(el, 'value') || 'null';
+    valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
+    addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
+    addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
+  }
+
+  function genSelect (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var selectedVal = "Array.prototype.filter" +
+      ".call($event.target.options,function(o){return o.selected})" +
+      ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
+      "return " + (number ? '_n(val)' : 'val') + "})";
+
+    var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
+    var code = "var $$selectedVal = " + selectedVal + ";";
+    code = code + " " + (genAssignmentCode(value, assignment));
+    addHandler(el, 'change', code, null, true);
+  }
+
+  function genDefaultModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var type = el.attrsMap.type;
+
+    // warn if v-bind:value conflicts with v-model
+    // except for inputs with v-bind:type
+    {
+      var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
+      var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+      if (value$1 && !typeBinding) {
+        var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
+        warn$1(
+          binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
+          'because the latter already expands to a value binding internally',
+          el.rawAttrsMap[binding]
+        );
+      }
+    }
+
+    var ref = modifiers || {};
+    var lazy = ref.lazy;
+    var number = ref.number;
+    var trim = ref.trim;
+    var needCompositionGuard = !lazy && type !== 'range';
+    var event = lazy
+      ? 'change'
+      : type === 'range'
+        ? RANGE_TOKEN
+        : 'input';
+
+    var valueExpression = '$event.target.value';
+    if (trim) {
+      valueExpression = "$event.target.value.trim()";
+    }
+    if (number) {
+      valueExpression = "_n(" + valueExpression + ")";
+    }
+
+    var code = genAssignmentCode(value, valueExpression);
+    if (needCompositionGuard) {
+      code = "if($event.target.composing)return;" + code;
+    }
+
+    addProp(el, 'value', ("(" + value + ")"));
+    addHandler(el, event, code, null, true);
+    if (trim || number) {
+      addHandler(el, 'blur', '$forceUpdate()');
+    }
+  }
+
+  /*  */
+
+  // normalize v-model event tokens that can only be determined at runtime.
+  // it's important to place the event as the first in the array because
+  // the whole point is ensuring the v-model callback gets called before
+  // user-attached handlers.
+  function normalizeEvents (on) {
+    /* istanbul ignore if */
+    if (isDef(on[RANGE_TOKEN])) {
+      // IE input[type=range] only supports `change` event
+      var event = isIE ? 'change' : 'input';
+      on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+      delete on[RANGE_TOKEN];
+    }
+    // This was originally intended to fix #4521 but no longer necessary
+    // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+    /* istanbul ignore if */
+    if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+      on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+      delete on[CHECKBOX_RADIO_TOKEN];
+    }
+  }
+
+  var target$1;
+
+  function createOnceHandler$1 (event, handler, capture) {
+    var _target = target$1; // save current target element in closure
+    return function onceHandler () {
+      var res = handler.apply(null, arguments);
+      if (res !== null) {
+        remove$2(event, onceHandler, capture, _target);
+      }
+    }
+  }
+
+  // #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+  // implementation and does not fire microtasks in between event propagation, so
+  // safe to exclude.
+  var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+  function add$1 (
+    name,
+    handler,
+    capture,
+    passive
+  ) {
+    // async edge case #6566: inner click event triggers patch, event handler
+    // attached to outer element during patch, and triggered again. This
+    // happens because browsers fire microtask ticks between event propagation.
+    // the solution is simple: we save the timestamp when a handler is attached,
+    // and the handler would only fire if the event passed to it was fired
+    // AFTER it was attached.
+    if (useMicrotaskFix) {
+      var attachedTimestamp = currentFlushTimestamp;
+      var original = handler;
+      handler = original._wrapper = function (e) {
+        if (
+          // no bubbling, should always fire.
+          // this is just a safety net in case event.timeStamp is unreliable in
+          // certain weird environments...
+          e.target === e.currentTarget ||
+          // event is fired after handler attachment
+          e.timeStamp >= attachedTimestamp ||
+          // bail for environments that have buggy event.timeStamp implementations
+          // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+          // #9681 QtWebEngine event.timeStamp is negative value
+          e.timeStamp <= 0 ||
+          // #9448 bail if event is fired in another document in a multi-page
+          // electron/nw.js app, since event.timeStamp will be using a different
+          // starting reference
+          e.target.ownerDocument !== document
+        ) {
+          return original.apply(this, arguments)
+        }
+      };
+    }
+    target$1.addEventListener(
+      name,
+      handler,
+      supportsPassive
+        ? { capture: capture, passive: passive }
+        : capture
+    );
+  }
+
+  function remove$2 (
+    name,
+    handler,
+    capture,
+    _target
+  ) {
+    (_target || target$1).removeEventListener(
+      name,
+      handler._wrapper || handler,
+      capture
+    );
+  }
+
+  function updateDOMListeners (oldVnode, vnode) {
+    if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+      return
+    }
+    var on = vnode.data.on || {};
+    var oldOn = oldVnode.data.on || {};
+    target$1 = vnode.elm;
+    normalizeEvents(on);
+    updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+    target$1 = undefined;
+  }
+
+  var events = {
+    create: updateDOMListeners,
+    update: updateDOMListeners
+  };
+
+  /*  */
+
+  var svgContainer;
+
+  function updateDOMProps (oldVnode, vnode) {
+    if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+      return
+    }
+    var key, cur;
+    var elm = vnode.elm;
+    var oldProps = oldVnode.data.domProps || {};
+    var props = vnode.data.domProps || {};
+    // clone observed objects, as the user probably wants to mutate it
+    if (isDef(props.__ob__)) {
+      props = vnode.data.domProps = extend({}, props);
+    }
+
+    for (key in oldProps) {
+      if (!(key in props)) {
+        elm[key] = '';
+      }
+    }
+
+    for (key in props) {
+      cur = props[key];
+      // ignore children if the node has textContent or innerHTML,
+      // as these will throw away existing DOM nodes and cause removal errors
+      // on subsequent patches (#3360)
+      if (key === 'textContent' || key === 'innerHTML') {
+        if (vnode.children) { vnode.children.length = 0; }
+        if (cur === oldProps[key]) { continue }
+        // #6601 work around Chrome version <= 55 bug where single textNode
+        // replaced by innerHTML/textContent retains its parentNode property
+        if (elm.childNodes.length === 1) {
+          elm.removeChild(elm.childNodes[0]);
+        }
+      }
+
+      if (key === 'value' && elm.tagName !== 'PROGRESS') {
+        // store value as _value as well since
+        // non-string values will be stringified
+        elm._value = cur;
+        // avoid resetting cursor position when value is the same
+        var strCur = isUndef(cur) ? '' : String(cur);
+        if (shouldUpdateValue(elm, strCur)) {
+          elm.value = strCur;
+        }
+      } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+        // IE doesn't support innerHTML for SVG elements
+        svgContainer = svgContainer || document.createElement('div');
+        svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+        var svg = svgContainer.firstChild;
+        while (elm.firstChild) {
+          elm.removeChild(elm.firstChild);
+        }
+        while (svg.firstChild) {
+          elm.appendChild(svg.firstChild);
+        }
+      } else if (
+        // skip the update if old and new VDOM state is the same.
+        // `value` is handled separately because the DOM value may be temporarily
+        // out of sync with VDOM state due to focus, composition and modifiers.
+        // This  #4521 by skipping the unnecessary `checked` update.
+        cur !== oldProps[key]
+      ) {
+        // some property updates can throw
+        // e.g. `value` on <progress> w/ non-finite value
+        try {
+          elm[key] = cur;
+        } catch (e) {}
+      }
+    }
+  }
+
+  // check platforms/web/util/attrs.js acceptValue
+
+
+  function shouldUpdateValue (elm, checkVal) {
+    return (!elm.composing && (
+      elm.tagName === 'OPTION' ||
+      isNotInFocusAndDirty(elm, checkVal) ||
+      isDirtyWithModifiers(elm, checkVal)
+    ))
+  }
+
+  function isNotInFocusAndDirty (elm, checkVal) {
+    // return true when textbox (.number and .trim) loses focus and its value is
+    // not equal to the updated value
+    var notInFocus = true;
+    // #6157
+    // work around IE bug when accessing document.activeElement in an iframe
+    try { notInFocus = document.activeElement !== elm; } catch (e) {}
+    return notInFocus && elm.value !== checkVal
+  }
+
+  function isDirtyWithModifiers (elm, newVal) {
+    var value = elm.value;
+    var modifiers = elm._vModifiers; // injected by v-model runtime
+    if (isDef(modifiers)) {
+      if (modifiers.number) {
+        return toNumber(value) !== toNumber(newVal)
+      }
+      if (modifiers.trim) {
+        return value.trim() !== newVal.trim()
+      }
+    }
+    return value !== newVal
+  }
+
+  var domProps = {
+    create: updateDOMProps,
+    update: updateDOMProps
+  };
+
+  /*  */
+
+  var parseStyleText = cached(function (cssText) {
+    var res = {};
+    var listDelimiter = /;(?![^(]*\))/g;
+    var propertyDelimiter = /:(.+)/;
+    cssText.split(listDelimiter).forEach(function (item) {
+      if (item) {
+        var tmp = item.split(propertyDelimiter);
+        tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+      }
+    });
+    return res
+  });
+
+  // merge static and dynamic style data on the same vnode
+  function normalizeStyleData (data) {
+    var style = normalizeStyleBinding(data.style);
+    // static style is pre-processed into an object during compilation
+    // and is always a fresh object, so it's safe to merge into it
+    return data.staticStyle
+      ? extend(data.staticStyle, style)
+      : style
+  }
+
+  // normalize possible array / string values into Object
+  function normalizeStyleBinding (bindingStyle) {
+    if (Array.isArray(bindingStyle)) {
+      return toObject(bindingStyle)
+    }
+    if (typeof bindingStyle === 'string') {
+      return parseStyleText(bindingStyle)
+    }
+    return bindingStyle
+  }
+
+  /**
+   * parent component style should be after child's
+   * so that parent component's style could override it
+   */
+  function getStyle (vnode, checkChild) {
+    var res = {};
+    var styleData;
+
+    if (checkChild) {
+      var childNode = vnode;
+      while (childNode.componentInstance) {
+        childNode = childNode.componentInstance._vnode;
+        if (
+          childNode && childNode.data &&
+          (styleData = normalizeStyleData(childNode.data))
+        ) {
+          extend(res, styleData);
+        }
+      }
+    }
+
+    if ((styleData = normalizeStyleData(vnode.data))) {
+      extend(res, styleData);
+    }
+
+    var parentNode = vnode;
+    while ((parentNode = parentNode.parent)) {
+      if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+        extend(res, styleData);
+      }
+    }
+    return res
+  }
+
+  /*  */
+
+  var cssVarRE = /^--/;
+  var importantRE = /\s*!important$/;
+  var setProp = function (el, name, val) {
+    /* istanbul ignore if */
+    if (cssVarRE.test(name)) {
+      el.style.setProperty(name, val);
+    } else if (importantRE.test(val)) {
+      el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+    } else {
+      var normalizedName = normalize(name);
+      if (Array.isArray(val)) {
+        // Support values array created by autoprefixer, e.g.
+        // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+        // Set them one by one, and the browser will only set those it can recognize
+        for (var i = 0, len = val.length; i < len; i++) {
+          el.style[normalizedName] = val[i];
+        }
+      } else {
+        el.style[normalizedName] = val;
+      }
+    }
+  };
+
+  var vendorNames = ['Webkit', 'Moz', 'ms'];
+
+  var emptyStyle;
+  var normalize = cached(function (prop) {
+    emptyStyle = emptyStyle || document.createElement('div').style;
+    prop = camelize(prop);
+    if (prop !== 'filter' && (prop in emptyStyle)) {
+      return prop
+    }
+    var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+    for (var i = 0; i < vendorNames.length; i++) {
+      var name = vendorNames[i] + capName;
+      if (name in emptyStyle) {
+        return name
+      }
+    }
+  });
+
+  function updateStyle (oldVnode, vnode) {
+    var data = vnode.data;
+    var oldData = oldVnode.data;
+
+    if (isUndef(data.staticStyle) && isUndef(data.style) &&
+      isUndef(oldData.staticStyle) && isUndef(oldData.style)
+    ) {
+      return
+    }
+
+    var cur, name;
+    var el = vnode.elm;
+    var oldStaticStyle = oldData.staticStyle;
+    var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
+
+    // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+    var oldStyle = oldStaticStyle || oldStyleBinding;
+
+    var style = normalizeStyleBinding(vnode.data.style) || {};
+
+    // store normalized style under a different key for next diff
+    // make sure to clone it if it's reactive, since the user likely wants
+    // to mutate it.
+    vnode.data.normalizedStyle = isDef(style.__ob__)
+      ? extend({}, style)
+      : style;
+
+    var newStyle = getStyle(vnode, true);
+
+    for (name in oldStyle) {
+      if (isUndef(newStyle[name])) {
+        setProp(el, name, '');
+      }
+    }
+    for (name in newStyle) {
+      cur = newStyle[name];
+      if (cur !== oldStyle[name]) {
+        // ie9 setting to null has no effect, must use empty string
+        setProp(el, name, cur == null ? '' : cur);
+      }
+    }
+  }
+
+  var style = {
+    create: updateStyle,
+    update: updateStyle
+  };
+
+  /*  */
+
+  var whitespaceRE = /\s+/;
+
+  /**
+   * Add class with compatibility for SVG since classList is not supported on
+   * SVG elements in IE
+   */
+  function addClass (el, cls) {
+    /* istanbul ignore if */
+    if (!cls || !(cls = cls.trim())) {
+      return
+    }
+
+    /* istanbul ignore else */
+    if (el.classList) {
+      if (cls.indexOf(' ') > -1) {
+        cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+      } else {
+        el.classList.add(cls);
+      }
+    } else {
+      var cur = " " + (el.getAttribute('class') || '') + " ";
+      if (cur.indexOf(' ' + cls + ' ') < 0) {
+        el.setAttribute('class', (cur + cls).trim());
+      }
+    }
+  }
+
+  /**
+   * Remove class with compatibility for SVG since classList is not supported on
+   * SVG elements in IE
+   */
+  function removeClass (el, cls) {
+    /* istanbul ignore if */
+    if (!cls || !(cls = cls.trim())) {
+      return
+    }
+
+    /* istanbul ignore else */
+    if (el.classList) {
+      if (cls.indexOf(' ') > -1) {
+        cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
+      } else {
+        el.classList.remove(cls);
+      }
+      if (!el.classList.length) {
+        el.removeAttribute('class');
+      }
+    } else {
+      var cur = " " + (el.getAttribute('class') || '') + " ";
+      var tar = ' ' + cls + ' ';
+      while (cur.indexOf(tar) >= 0) {
+        cur = cur.replace(tar, ' ');
+      }
+      cur = cur.trim();
+      if (cur) {
+        el.setAttribute('class', cur);
+      } else {
+        el.removeAttribute('class');
+      }
+    }
+  }
+
+  /*  */
+
+  function resolveTransition (def$$1) {
+    if (!def$$1) {
+      return
+    }
+    /* istanbul ignore else */
+    if (typeof def$$1 === 'object') {
+      var res = {};
+      if (def$$1.css !== false) {
+        extend(res, autoCssTransition(def$$1.name || 'v'));
+      }
+      extend(res, def$$1);
+      return res
+    } else if (typeof def$$1 === 'string') {
+      return autoCssTransition(def$$1)
+    }
+  }
+
+  var autoCssTransition = cached(function (name) {
+    return {
+      enterClass: (name + "-enter"),
+      enterToClass: (name + "-enter-to"),
+      enterActiveClass: (name + "-enter-active"),
+      leaveClass: (name + "-leave"),
+      leaveToClass: (name + "-leave-to"),
+      leaveActiveClass: (name + "-leave-active")
+    }
+  });
+
+  var hasTransition = inBrowser && !isIE9;
+  var TRANSITION = 'transition';
+  var ANIMATION = 'animation';
+
+  // Transition property/event sniffing
+  var transitionProp = 'transition';
+  var transitionEndEvent = 'transitionend';
+  var animationProp = 'animation';
+  var animationEndEvent = 'animationend';
+  if (hasTransition) {
+    /* istanbul ignore if */
+    if (window.ontransitionend === undefined &&
+      window.onwebkittransitionend !== undefined
+    ) {
+      transitionProp = 'WebkitTransition';
+      transitionEndEvent = 'webkitTransitionEnd';
+    }
+    if (window.onanimationend === undefined &&
+      window.onwebkitanimationend !== undefined
+    ) {
+      animationProp = 'WebkitAnimation';
+      animationEndEvent = 'webkitAnimationEnd';
+    }
+  }
+
+  // binding to window is necessary to make hot reload work in IE in strict mode
+  var raf = inBrowser
+    ? window.requestAnimationFrame
+      ? window.requestAnimationFrame.bind(window)
+      : setTimeout
+    : /* istanbul ignore next */ function (fn) { return fn(); };
+
+  function nextFrame (fn) {
+    raf(function () {
+      raf(fn);
+    });
+  }
+
+  function addTransitionClass (el, cls) {
+    var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+    if (transitionClasses.indexOf(cls) < 0) {
+      transitionClasses.push(cls);
+      addClass(el, cls);
+    }
+  }
+
+  function removeTransitionClass (el, cls) {
+    if (el._transitionClasses) {
+      remove(el._transitionClasses, cls);
+    }
+    removeClass(el, cls);
+  }
+
+  function whenTransitionEnds (
+    el,
+    expectedType,
+    cb
+  ) {
+    var ref = getTransitionInfo(el, expectedType);
+    var type = ref.type;
+    var timeout = ref.timeout;
+    var propCount = ref.propCount;
+    if (!type) { return cb() }
+    var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+    var ended = 0;
+    var end = function () {
+      el.removeEventListener(event, onEnd);
+      cb();
+    };
+    var onEnd = function (e) {
+      if (e.target === el) {
+        if (++ended >= propCount) {
+          end();
+        }
+      }
+    };
+    setTimeout(function () {
+      if (ended < propCount) {
+        end();
+      }
+    }, timeout + 1);
+    el.addEventListener(event, onEnd);
+  }
+
+  var transformRE = /\b(transform|all)(,|$)/;
+
+  function getTransitionInfo (el, expectedType) {
+    var styles = window.getComputedStyle(el);
+    // JSDOM may return undefined for transition properties
+    var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+    var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+    var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+    var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+    var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+    var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+    var type;
+    var timeout = 0;
+    var propCount = 0;
+    /* istanbul ignore if */
+    if (expectedType === TRANSITION) {
+      if (transitionTimeout > 0) {
+        type = TRANSITION;
+        timeout = transitionTimeout;
+        propCount = transitionDurations.length;
+      }
+    } else if (expectedType === ANIMATION) {
+      if (animationTimeout > 0) {
+        type = ANIMATION;
+        timeout = animationTimeout;
+        propCount = animationDurations.length;
+      }
+    } else {
+      timeout = Math.max(transitionTimeout, animationTimeout);
+      type = timeout > 0
+        ? transitionTimeout > animationTimeout
+          ? TRANSITION
+          : ANIMATION
+        : null;
+      propCount = type
+        ? type === TRANSITION
+          ? transitionDurations.length
+          : animationDurations.length
+        : 0;
+    }
+    var hasTransform =
+      type === TRANSITION &&
+      transformRE.test(styles[transitionProp + 'Property']);
+    return {
+      type: type,
+      timeout: timeout,
+      propCount: propCount,
+      hasTransform: hasTransform
+    }
+  }
+
+  function getTimeout (delays, durations) {
+    /* istanbul ignore next */
+    while (delays.length < durations.length) {
+      delays = delays.concat(delays);
+    }
+
+    return Math.max.apply(null, durations.map(function (d, i) {
+      return toMs(d) + toMs(delays[i])
+    }))
+  }
+
+  // Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+  // in a locale-dependent way, using a comma instead of a dot.
+  // If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+  // as a floor function) causing unexpected behaviors
+  function toMs (s) {
+    return Number(s.slice(0, -1).replace(',', '.')) * 1000
+  }
+
+  /*  */
+
+  function enter (vnode, toggleDisplay) {
+    var el = vnode.elm;
+
+    // call leave callback now
+    if (isDef(el._leaveCb)) {
+      el._leaveCb.cancelled = true;
+      el._leaveCb();
+    }
+
+    var data = resolveTransition(vnode.data.transition);
+    if (isUndef(data)) {
+      return
+    }
+
+    /* istanbul ignore if */
+    if (isDef(el._enterCb) || el.nodeType !== 1) {
+      return
+    }
+
+    var css = data.css;
+    var type = data.type;
+    var enterClass = data.enterClass;
+    var enterToClass = data.enterToClass;
+    var enterActiveClass = data.enterActiveClass;
+    var appearClass = data.appearClass;
+    var appearToClass = data.appearToClass;
+    var appearActiveClass = data.appearActiveClass;
+    var beforeEnter = data.beforeEnter;
+    var enter = data.enter;
+    var afterEnter = data.afterEnter;
+    var enterCancelled = data.enterCancelled;
+    var beforeAppear = data.beforeAppear;
+    var appear = data.appear;
+    var afterAppear = data.afterAppear;
+    var appearCancelled = data.appearCancelled;
+    var duration = data.duration;
+
+    // activeInstance will always be the <transition> component managing this
+    // transition. One edge case to check is when the <transition> is placed
+    // as the root node of a child component. In that case we need to check
+    // <transition>'s parent for appear check.
+    var context = activeInstance;
+    var transitionNode = activeInstance.$vnode;
+    while (transitionNode && transitionNode.parent) {
+      context = transitionNode.context;
+      transitionNode = transitionNode.parent;
+    }
+
+    var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+    if (isAppear && !appear && appear !== '') {
+      return
+    }
+
+    var startClass = isAppear && appearClass
+      ? appearClass
+      : enterClass;
+    var activeClass = isAppear && appearActiveClass
+      ? appearActiveClass
+      : enterActiveClass;
+    var toClass = isAppear && appearToClass
+      ? appearToClass
+      : enterToClass;
+
+    var beforeEnterHook = isAppear
+      ? (beforeAppear || beforeEnter)
+      : beforeEnter;
+    var enterHook = isAppear
+      ? (typeof appear === 'function' ? appear : enter)
+      : enter;
+    var afterEnterHook = isAppear
+      ? (afterAppear || afterEnter)
+      : afterEnter;
+    var enterCancelledHook = isAppear
+      ? (appearCancelled || enterCancelled)
+      : enterCancelled;
+
+    var explicitEnterDuration = toNumber(
+      isObject(duration)
+        ? duration.enter
+        : duration
+    );
+
+    if (explicitEnterDuration != null) {
+      checkDuration(explicitEnterDuration, 'enter', vnode);
+    }
+
+    var expectsCSS = css !== false && !isIE9;
+    var userWantsControl = getHookArgumentsLength(enterHook);
+
+    var cb = el._enterCb = once(function () {
+      if (expectsCSS) {
+        removeTransitionClass(el, toClass);
+        removeTransitionClass(el, activeClass);
+      }
+      if (cb.cancelled) {
+        if (expectsCSS) {
+          removeTransitionClass(el, startClass);
+        }
+        enterCancelledHook && enterCancelledHook(el);
+      } else {
+        afterEnterHook && afterEnterHook(el);
+      }
+      el._enterCb = null;
+    });
+
+    if (!vnode.data.show) {
+      // remove pending leave element on enter by injecting an insert hook
+      mergeVNodeHook(vnode, 'insert', function () {
+        var parent = el.parentNode;
+        var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+        if (pendingNode &&
+          pendingNode.tag === vnode.tag &&
+          pendingNode.elm._leaveCb
+        ) {
+          pendingNode.elm._leaveCb();
+        }
+        enterHook && enterHook(el, cb);
+      });
+    }
+
+    // start enter transition
+    beforeEnterHook && beforeEnterHook(el);
+    if (expectsCSS) {
+      addTransitionClass(el, startClass);
+      addTransitionClass(el, activeClass);
+      nextFrame(function () {
+        removeTransitionClass(el, startClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, toClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitEnterDuration)) {
+              setTimeout(cb, explicitEnterDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
+    }
+
+    if (vnode.data.show) {
+      toggleDisplay && toggleDisplay();
+      enterHook && enterHook(el, cb);
+    }
+
+    if (!expectsCSS && !userWantsControl) {
+      cb();
+    }
+  }
+
+  function leave (vnode, rm) {
+    var el = vnode.elm;
+
+    // call enter callback now
+    if (isDef(el._enterCb)) {
+      el._enterCb.cancelled = true;
+      el._enterCb();
+    }
+
+    var data = resolveTransition(vnode.data.transition);
+    if (isUndef(data) || el.nodeType !== 1) {
+      return rm()
+    }
+
+    /* istanbul ignore if */
+    if (isDef(el._leaveCb)) {
+      return
+    }
+
+    var css = data.css;
+    var type = data.type;
+    var leaveClass = data.leaveClass;
+    var leaveToClass = data.leaveToClass;
+    var leaveActiveClass = data.leaveActiveClass;
+    var beforeLeave = data.beforeLeave;
+    var leave = data.leave;
+    var afterLeave = data.afterLeave;
+    var leaveCancelled = data.leaveCancelled;
+    var delayLeave = data.delayLeave;
+    var duration = data.duration;
+
+    var expectsCSS = css !== false && !isIE9;
+    var userWantsControl = getHookArgumentsLength(leave);
+
+    var explicitLeaveDuration = toNumber(
+      isObject(duration)
+        ? duration.leave
+        : duration
+    );
+
+    if (isDef(explicitLeaveDuration)) {
+      checkDuration(explicitLeaveDuration, 'leave', vnode);
+    }
+
+    var cb = el._leaveCb = once(function () {
+      if (el.parentNode && el.parentNode._pending) {
+        el.parentNode._pending[vnode.key] = null;
+      }
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveToClass);
+        removeTransitionClass(el, leaveActiveClass);
+      }
+      if (cb.cancelled) {
+        if (expectsCSS) {
+          removeTransitionClass(el, leaveClass);
+        }
+        leaveCancelled && leaveCancelled(el);
+      } else {
+        rm();
+        afterLeave && afterLeave(el);
+      }
+      el._leaveCb = null;
+    });
+
+    if (delayLeave) {
+      delayLeave(performLeave);
+    } else {
+      performLeave();
+    }
+
+    function performLeave () {
+      // the delayed leave may have already been cancelled
+      if (cb.cancelled) {
+        return
+      }
+      // record leaving element
+      if (!vnode.data.show && el.parentNode) {
+        (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+      }
+      beforeLeave && beforeLeave(el);
+      if (expectsCSS) {
+        addTransitionClass(el, leaveClass);
+        addTransitionClass(el, leaveActiveClass);
+        nextFrame(function () {
+          removeTransitionClass(el, leaveClass);
+          if (!cb.cancelled) {
+            addTransitionClass(el, leaveToClass);
+            if (!userWantsControl) {
+              if (isValidDuration(explicitLeaveDuration)) {
+                setTimeout(cb, explicitLeaveDuration);
+              } else {
+                whenTransitionEnds(el, type, cb);
+              }
+            }
+          }
+        });
+      }
+      leave && leave(el, cb);
+      if (!expectsCSS && !userWantsControl) {
+        cb();
+      }
+    }
+  }
+
+  // only used in dev mode
+  function checkDuration (val, name, vnode) {
+    if (typeof val !== 'number') {
+      warn(
+        "<transition> explicit " + name + " duration is not a valid number - " +
+        "got " + (JSON.stringify(val)) + ".",
+        vnode.context
+      );
+    } else if (isNaN(val)) {
+      warn(
+        "<transition> explicit " + name + " duration is NaN - " +
+        'the duration expression might be incorrect.',
+        vnode.context
+      );
+    }
+  }
+
+  function isValidDuration (val) {
+    return typeof val === 'number' && !isNaN(val)
+  }
+
+  /**
+   * Normalize a transition hook's argument length. The hook may be:
+   * - a merged hook (invoker) with the original in .fns
+   * - a wrapped component method (check ._length)
+   * - a plain function (.length)
+   */
+  function getHookArgumentsLength (fn) {
+    if (isUndef(fn)) {
+      return false
+    }
+    var invokerFns = fn.fns;
+    if (isDef(invokerFns)) {
+      // invoker
+      return getHookArgumentsLength(
+        Array.isArray(invokerFns)
+          ? invokerFns[0]
+          : invokerFns
+      )
+    } else {
+      return (fn._length || fn.length) > 1
+    }
+  }
+
+  function _enter (_, vnode) {
+    if (vnode.data.show !== true) {
+      enter(vnode);
+    }
+  }
+
+  var transition = inBrowser ? {
+    create: _enter,
+    activate: _enter,
+    remove: function remove$$1 (vnode, rm) {
+      /* istanbul ignore else */
+      if (vnode.data.show !== true) {
+        leave(vnode, rm);
+      } else {
+        rm();
+      }
+    }
+  } : {};
+
+  var platformModules = [
+    attrs,
+    klass,
+    events,
+    domProps,
+    style,
+    transition
+  ];
+
+  /*  */
+
+  // the directive module should be applied last, after all
+  // built-in modules have been applied.
+  var modules = platformModules.concat(baseModules);
+
+  var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+  /**
+   * Not type checking this file because flow doesn't like attaching
+   * properties to Elements.
+   */
+
+  /* istanbul ignore if */
+  if (isIE9) {
+    // http://www.matts411.com/post/internet-explorer-9-oninput/
+    document.addEventListener('selectionchange', function () {
+      var el = document.activeElement;
+      if (el && el.vmodel) {
+        trigger(el, 'input');
+      }
+    });
+  }
+
+  var directive = {
+    inserted: function inserted (el, binding, vnode, oldVnode) {
+      if (vnode.tag === 'select') {
+        // #6903
+        if (oldVnode.elm && !oldVnode.elm._vOptions) {
+          mergeVNodeHook(vnode, 'postpatch', function () {
+            directive.componentUpdated(el, binding, vnode);
+          });
+        } else {
+          setSelected(el, binding, vnode.context);
+        }
+        el._vOptions = [].map.call(el.options, getValue);
+      } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+        el._vModifiers = binding.modifiers;
+        if (!binding.modifiers.lazy) {
+          el.addEventListener('compositionstart', onCompositionStart);
+          el.addEventListener('compositionend', onCompositionEnd);
+          // Safari < 10.2 & UIWebView doesn't fire compositionend when
+          // switching focus before confirming composition choice
+          // this also fixes the issue where some browsers e.g. iOS Chrome
+          // fires "change" instead of "input" on autocomplete.
+          el.addEventListener('change', onCompositionEnd);
+          /* istanbul ignore if */
+          if (isIE9) {
+            el.vmodel = true;
+          }
+        }
+      }
+    },
+
+    componentUpdated: function componentUpdated (el, binding, vnode) {
+      if (vnode.tag === 'select') {
+        setSelected(el, binding, vnode.context);
+        // in case the options rendered by v-for have changed,
+        // it's possible that the value is out-of-sync with the rendered options.
+        // detect such cases and filter out values that no longer has a matching
+        // option in the DOM.
+        var prevOptions = el._vOptions;
+        var curOptions = el._vOptions = [].map.call(el.options, getValue);
+        if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+          // trigger change event if
+          // no matching option found for at least one value
+          var needReset = el.multiple
+            ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+            : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+          if (needReset) {
+            trigger(el, 'change');
+          }
+        }
+      }
+    }
+  };
+
+  function setSelected (el, binding, vm) {
+    actuallySetSelected(el, binding, vm);
+    /* istanbul ignore if */
+    if (isIE || isEdge) {
+      setTimeout(function () {
+        actuallySetSelected(el, binding, vm);
+      }, 0);
+    }
+  }
+
+  function actuallySetSelected (el, binding, vm) {
+    var value = binding.value;
+    var isMultiple = el.multiple;
+    if (isMultiple && !Array.isArray(value)) {
+      warn(
+        "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+        "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+        vm
+      );
+      return
+    }
+    var selected, option;
+    for (var i = 0, l = el.options.length; i < l; i++) {
+      option = el.options[i];
+      if (isMultiple) {
+        selected = looseIndexOf(value, getValue(option)) > -1;
+        if (option.selected !== selected) {
+          option.selected = selected;
+        }
+      } else {
+        if (looseEqual(getValue(option), value)) {
+          if (el.selectedIndex !== i) {
+            el.selectedIndex = i;
+          }
+          return
+        }
+      }
+    }
+    if (!isMultiple) {
+      el.selectedIndex = -1;
+    }
+  }
+
+  function hasNoMatchingOption (value, options) {
+    return options.every(function (o) { return !looseEqual(o, value); })
+  }
+
+  function getValue (option) {
+    return '_value' in option
+      ? option._value
+      : option.value
+  }
+
+  function onCompositionStart (e) {
+    e.target.composing = true;
+  }
+
+  function onCompositionEnd (e) {
+    // prevent triggering an input event for no reason
+    if (!e.target.composing) { return }
+    e.target.composing = false;
+    trigger(e.target, 'input');
+  }
+
+  function trigger (el, type) {
+    var e = document.createEvent('HTMLEvents');
+    e.initEvent(type, true, true);
+    el.dispatchEvent(e);
+  }
+
+  /*  */
+
+  // recursively search for possible transition defined inside the component root
+  function locateNode (vnode) {
+    return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+      ? locateNode(vnode.componentInstance._vnode)
+      : vnode
+  }
+
+  var show = {
+    bind: function bind (el, ref, vnode) {
+      var value = ref.value;
+
+      vnode = locateNode(vnode);
+      var transition$$1 = vnode.data && vnode.data.transition;
+      var originalDisplay = el.__vOriginalDisplay =
+        el.style.display === 'none' ? '' : el.style.display;
+      if (value && transition$$1) {
+        vnode.data.show = true;
+        enter(vnode, function () {
+          el.style.display = originalDisplay;
+        });
+      } else {
+        el.style.display = value ? originalDisplay : 'none';
+      }
+    },
+
+    update: function update (el, ref, vnode) {
+      var value = ref.value;
+      var oldValue = ref.oldValue;
+
+      /* istanbul ignore if */
+      if (!value === !oldValue) { return }
+      vnode = locateNode(vnode);
+      var transition$$1 = vnode.data && vnode.data.transition;
+      if (transition$$1) {
+        vnode.data.show = true;
+        if (value) {
+          enter(vnode, function () {
+            el.style.display = el.__vOriginalDisplay;
+          });
+        } else {
+          leave(vnode, function () {
+            el.style.display = 'none';
+          });
+        }
+      } else {
+        el.style.display = value ? el.__vOriginalDisplay : 'none';
+      }
+    },
+
+    unbind: function unbind (
+      el,
+      binding,
+      vnode,
+      oldVnode,
+      isDestroy
+    ) {
+      if (!isDestroy) {
+        el.style.display = el.__vOriginalDisplay;
+      }
+    }
+  };
+
+  var platformDirectives = {
+    model: directive,
+    show: show
+  };
+
+  /*  */
+
+  var transitionProps = {
+    name: String,
+    appear: Boolean,
+    css: Boolean,
+    mode: String,
+    type: String,
+    enterClass: String,
+    leaveClass: String,
+    enterToClass: String,
+    leaveToClass: String,
+    enterActiveClass: String,
+    leaveActiveClass: String,
+    appearClass: String,
+    appearActiveClass: String,
+    appearToClass: String,
+    duration: [Number, String, Object]
+  };
+
+  // in case the child is also an abstract component, e.g. <keep-alive>
+  // we want to recursively retrieve the real component to be rendered
+  function getRealChild (vnode) {
+    var compOptions = vnode && vnode.componentOptions;
+    if (compOptions && compOptions.Ctor.options.abstract) {
+      return getRealChild(getFirstComponentChild(compOptions.children))
+    } else {
+      return vnode
+    }
+  }
+
+  function extractTransitionData (comp) {
+    var data = {};
+    var options = comp.$options;
+    // props
+    for (var key in options.propsData) {
+      data[key] = comp[key];
+    }
+    // events.
+    // extract listeners and pass them directly to the transition methods
+    var listeners = options._parentListeners;
+    for (var key$1 in listeners) {
+      data[camelize(key$1)] = listeners[key$1];
+    }
+    return data
+  }
+
+  function placeholder (h, rawChild) {
+    if (/\d-keep-alive$/.test(rawChild.tag)) {
+      return h('keep-alive', {
+        props: rawChild.componentOptions.propsData
+      })
+    }
+  }
+
+  function hasParentTransition (vnode) {
+    while ((vnode = vnode.parent)) {
+      if (vnode.data.transition) {
+        return true
+      }
+    }
+  }
+
+  function isSameChild (child, oldChild) {
+    return oldChild.key === child.key && oldChild.tag === child.tag
+  }
+
+  var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+  var isVShowDirective = function (d) { return d.name === 'show'; };
+
+  var Transition = {
+    name: 'transition',
+    props: transitionProps,
+    abstract: true,
+
+    render: function render (h) {
+      var this$1 = this;
+
+      var children = this.$slots.default;
+      if (!children) {
+        return
+      }
+
+      // filter out text nodes (possible whitespaces)
+      children = children.filter(isNotTextNode);
+      /* istanbul ignore if */
+      if (!children.length) {
+        return
+      }
+
+      // warn multiple elements
+      if (children.length > 1) {
+        warn(
+          '<transition> can only be used on a single element. Use ' +
+          '<transition-group> for lists.',
+          this.$parent
+        );
+      }
+
+      var mode = this.mode;
+
+      // warn invalid mode
+      if (mode && mode !== 'in-out' && mode !== 'out-in'
+      ) {
+        warn(
+          'invalid <transition> mode: ' + mode,
+          this.$parent
+        );
+      }
+
+      var rawChild = children[0];
+
+      // if this is a component root node and the component's
+      // parent container node also has transition, skip.
+      if (hasParentTransition(this.$vnode)) {
+        return rawChild
+      }
+
+      // apply transition data to child
+      // use getRealChild() to ignore abstract components e.g. keep-alive
+      var child = getRealChild(rawChild);
+      /* istanbul ignore if */
+      if (!child) {
+        return rawChild
+      }
+
+      if (this._leaving) {
+        return placeholder(h, rawChild)
+      }
+
+      // ensure a key that is unique to the vnode type and to this transition
+      // component instance. This key will be used to remove pending leaving nodes
+      // during entering.
+      var id = "__transition-" + (this._uid) + "-";
+      child.key = child.key == null
+        ? child.isComment
+          ? id + 'comment'
+          : id + child.tag
+        : isPrimitive(child.key)
+          ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+          : child.key;
+
+      var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+      var oldRawChild = this._vnode;
+      var oldChild = getRealChild(oldRawChild);
+
+      // mark v-show
+      // so that the transition module can hand over the control to the directive
+      if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+        child.data.show = true;
+      }
+
+      if (
+        oldChild &&
+        oldChild.data &&
+        !isSameChild(child, oldChild) &&
+        !isAsyncPlaceholder(oldChild) &&
+        // #6687 component root is a comment node
+        !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+      ) {
+        // replace old child transition data with fresh one
+        // important for dynamic transitions!
+        var oldData = oldChild.data.transition = extend({}, data);
+        // handle transition mode
+        if (mode === 'out-in') {
+          // return placeholder node and queue update when leave finishes
+          this._leaving = true;
+          mergeVNodeHook(oldData, 'afterLeave', function () {
+            this$1._leaving = false;
+            this$1.$forceUpdate();
+          });
+          return placeholder(h, rawChild)
+        } else if (mode === 'in-out') {
+          if (isAsyncPlaceholder(child)) {
+            return oldRawChild
+          }
+          var delayedLeave;
+          var performLeave = function () { delayedLeave(); };
+          mergeVNodeHook(data, 'afterEnter', performLeave);
+          mergeVNodeHook(data, 'enterCancelled', performLeave);
+          mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
+        }
+      }
+
+      return rawChild
+    }
+  };
+
+  /*  */
+
+  var props = extend({
+    tag: String,
+    moveClass: String
+  }, transitionProps);
+
+  delete props.mode;
+
+  var TransitionGroup = {
+    props: props,
+
+    beforeMount: function beforeMount () {
+      var this$1 = this;
+
+      var update = this._update;
+      this._update = function (vnode, hydrating) {
+        var restoreActiveInstance = setActiveInstance(this$1);
+        // force removing pass
+        this$1.__patch__(
+          this$1._vnode,
+          this$1.kept,
+          false, // hydrating
+          true // removeOnly (!important, avoids unnecessary moves)
+        );
+        this$1._vnode = this$1.kept;
+        restoreActiveInstance();
+        update.call(this$1, vnode, hydrating);
+      };
+    },
+
+    render: function render (h) {
+      var tag = this.tag || this.$vnode.data.tag || 'span';
+      var map = Object.create(null);
+      var prevChildren = this.prevChildren = this.children;
+      var rawChildren = this.$slots.default || [];
+      var children = this.children = [];
+      var transitionData = extractTransitionData(this);
+
+      for (var i = 0; i < rawChildren.length; i++) {
+        var c = rawChildren[i];
+        if (c.tag) {
+          if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+            children.push(c);
+            map[c.key] = c
+            ;(c.data || (c.data = {})).transition = transitionData;
+          } else {
+            var opts = c.componentOptions;
+            var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+            warn(("<transition-group> children must be keyed: <" + name + ">"));
+          }
+        }
+      }
+
+      if (prevChildren) {
+        var kept = [];
+        var removed = [];
+        for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+          var c$1 = prevChildren[i$1];
+          c$1.data.transition = transitionData;
+          c$1.data.pos = c$1.elm.getBoundingClientRect();
+          if (map[c$1.key]) {
+            kept.push(c$1);
+          } else {
+            removed.push(c$1);
+          }
+        }
+        this.kept = h(tag, null, kept);
+        this.removed = removed;
+      }
+
+      return h(tag, null, children)
+    },
+
+    updated: function updated () {
+      var children = this.prevChildren;
+      var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+      if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+        return
+      }
+
+      // we divide the work into three loops to avoid mixing DOM reads and writes
+      // in each iteration - which helps prevent layout thrashing.
+      children.forEach(callPendingCbs);
+      children.forEach(recordPosition);
+      children.forEach(applyTranslation);
+
+      // force reflow to put everything in position
+      // assign to this to avoid being removed in tree-shaking
+      // $flow-disable-line
+      this._reflow = document.body.offsetHeight;
+
+      children.forEach(function (c) {
+        if (c.data.moved) {
+          var el = c.elm;
+          var s = el.style;
+          addTransitionClass(el, moveClass);
+          s.transform = s.WebkitTransform = s.transitionDuration = '';
+          el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+            if (e && e.target !== el) {
+              return
+            }
+            if (!e || /transform$/.test(e.propertyName)) {
+              el.removeEventListener(transitionEndEvent, cb);
+              el._moveCb = null;
+              removeTransitionClass(el, moveClass);
+            }
+          });
+        }
+      });
+    },
+
+    methods: {
+      hasMove: function hasMove (el, moveClass) {
+        /* istanbul ignore if */
+        if (!hasTransition) {
+          return false
+        }
+        /* istanbul ignore if */
+        if (this._hasMove) {
+          return this._hasMove
+        }
+        // Detect whether an element with the move class applied has
+        // CSS transitions. Since the element may be inside an entering
+        // transition at this very moment, we make a clone of it and remove
+        // all other transition classes applied to ensure only the move class
+        // is applied.
+        var clone = el.cloneNode();
+        if (el._transitionClasses) {
+          el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+        }
+        addClass(clone, moveClass);
+        clone.style.display = 'none';
+        this.$el.appendChild(clone);
+        var info = getTransitionInfo(clone);
+        this.$el.removeChild(clone);
+        return (this._hasMove = info.hasTransform)
+      }
+    }
+  };
+
+  function callPendingCbs (c) {
+    /* istanbul ignore if */
+    if (c.elm._moveCb) {
+      c.elm._moveCb();
+    }
+    /* istanbul ignore if */
+    if (c.elm._enterCb) {
+      c.elm._enterCb();
+    }
+  }
+
+  function recordPosition (c) {
+    c.data.newPos = c.elm.getBoundingClientRect();
+  }
+
+  function applyTranslation (c) {
+    var oldPos = c.data.pos;
+    var newPos = c.data.newPos;
+    var dx = oldPos.left - newPos.left;
+    var dy = oldPos.top - newPos.top;
+    if (dx || dy) {
+      c.data.moved = true;
+      var s = c.elm.style;
+      s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+      s.transitionDuration = '0s';
+    }
+  }
+
+  var platformComponents = {
+    Transition: Transition,
+    TransitionGroup: TransitionGroup
+  };
+
+  /*  */
+
+  // install platform specific utils
+  Vue.config.mustUseProp = mustUseProp;
+  Vue.config.isReservedTag = isReservedTag;
+  Vue.config.isReservedAttr = isReservedAttr;
+  Vue.config.getTagNamespace = getTagNamespace;
+  Vue.config.isUnknownElement = isUnknownElement;
+
+  // install platform runtime directives & components
+  extend(Vue.options.directives, platformDirectives);
+  extend(Vue.options.components, platformComponents);
+
+  // install platform patch function
+  Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+  // public mount method
+  Vue.prototype.$mount = function (
+    el,
+    hydrating
+  ) {
+    el = el && inBrowser ? query(el) : undefined;
+    return mountComponent(this, el, hydrating)
+  };
 
   // devtools global hook
   /* istanbul ignore next */
-  setTimeout(function () {
-    if (config.devtools) {
-      if (devtools) {
-        devtools.emit('init', Vue);
-      } else if ('development' !== 'production' && inBrowser && /Chrome\/\d+/.test(window.navigator.userAgent)) {
-        console.log('Download the Vue Devtools for a better development experience:\n' + 'https://github.com/vuejs/vue-devtools');
+  if (inBrowser) {
+    setTimeout(function () {
+      if (config.devtools) {
+        if (devtools) {
+          devtools.emit('init', Vue);
+        } else {
+          console[console.info ? 'info' : 'log'](
+            'Download the Vue Devtools extension for a better development experience:\n' +
+            'https://github.com/vuejs/vue-devtools'
+          );
+        }
+      }
+      if (config.productionTip !== false &&
+        typeof console !== 'undefined'
+      ) {
+        console[console.info ? 'info' : 'log'](
+          "You are running Vue in development mode.\n" +
+          "Make sure to turn on production mode when deploying for production.\n" +
+          "See more tips at https://vuejs.org/guide/deployment.html"
+        );
+      }
+    }, 0);
+  }
+
+  /*  */
+
+  var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
+  var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
+
+  var buildRegex = cached(function (delimiters) {
+    var open = delimiters[0].replace(regexEscapeRE, '\\$&');
+    var close = delimiters[1].replace(regexEscapeRE, '\\$&');
+    return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
+  });
+
+
+
+  function parseText (
+    text,
+    delimiters
+  ) {
+    var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
+    if (!tagRE.test(text)) {
+      return
+    }
+    var tokens = [];
+    var rawTokens = [];
+    var lastIndex = tagRE.lastIndex = 0;
+    var match, index, tokenValue;
+    while ((match = tagRE.exec(text))) {
+      index = match.index;
+      // push text token
+      if (index > lastIndex) {
+        rawTokens.push(tokenValue = text.slice(lastIndex, index));
+        tokens.push(JSON.stringify(tokenValue));
+      }
+      // tag token
+      var exp = parseFilters(match[1].trim());
+      tokens.push(("_s(" + exp + ")"));
+      rawTokens.push({ '@binding': exp });
+      lastIndex = index + match[0].length;
+    }
+    if (lastIndex < text.length) {
+      rawTokens.push(tokenValue = text.slice(lastIndex));
+      tokens.push(JSON.stringify(tokenValue));
+    }
+    return {
+      expression: tokens.join('+'),
+      tokens: rawTokens
+    }
+  }
+
+  /*  */
+
+  function transformNode (el, options) {
+    var warn = options.warn || baseWarn;
+    var staticClass = getAndRemoveAttr(el, 'class');
+    if (staticClass) {
+      var res = parseText(staticClass, options.delimiters);
+      if (res) {
+        warn(
+          "class=\"" + staticClass + "\": " +
+          'Interpolation inside attributes has been removed. ' +
+          'Use v-bind or the colon shorthand instead. For example, ' +
+          'instead of <div class="{{ val }}">, use <div :class="val">.',
+          el.rawAttrsMap['class']
+        );
       }
     }
-  }, 0);
+    if (staticClass) {
+      el.staticClass = JSON.stringify(staticClass);
+    }
+    var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
+    if (classBinding) {
+      el.classBinding = classBinding;
+    }
+  }
+
+  function genData (el) {
+    var data = '';
+    if (el.staticClass) {
+      data += "staticClass:" + (el.staticClass) + ",";
+    }
+    if (el.classBinding) {
+      data += "class:" + (el.classBinding) + ",";
+    }
+    return data
+  }
+
+  var klass$1 = {
+    staticKeys: ['staticClass'],
+    transformNode: transformNode,
+    genData: genData
+  };
+
+  /*  */
+
+  function transformNode$1 (el, options) {
+    var warn = options.warn || baseWarn;
+    var staticStyle = getAndRemoveAttr(el, 'style');
+    if (staticStyle) {
+      /* istanbul ignore if */
+      {
+        var res = parseText(staticStyle, options.delimiters);
+        if (res) {
+          warn(
+            "style=\"" + staticStyle + "\": " +
+            'Interpolation inside attributes has been removed. ' +
+            'Use v-bind or the colon shorthand instead. For example, ' +
+            'instead of <div style="{{ val }}">, use <div :style="val">.',
+            el.rawAttrsMap['style']
+          );
+        }
+      }
+      el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
+    }
+
+    var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
+    if (styleBinding) {
+      el.styleBinding = styleBinding;
+    }
+  }
+
+  function genData$1 (el) {
+    var data = '';
+    if (el.staticStyle) {
+      data += "staticStyle:" + (el.staticStyle) + ",";
+    }
+    if (el.styleBinding) {
+      data += "style:(" + (el.styleBinding) + "),";
+    }
+    return data
+  }
+
+  var style$1 = {
+    staticKeys: ['staticStyle'],
+    transformNode: transformNode$1,
+    genData: genData$1
+  };
+
+  /*  */
+
+  var decoder;
+
+  var he = {
+    decode: function decode (html) {
+      decoder = decoder || document.createElement('div');
+      decoder.innerHTML = html;
+      return decoder.textContent
+    }
+  };
+
+  /*  */
+
+  var isUnaryTag = makeMap(
+    'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
+    'link,meta,param,source,track,wbr'
+  );
+
+  // Elements that you can, intentionally, leave open
+  // (and which close themselves)
+  var canBeLeftOpenTag = makeMap(
+    'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
+  );
+
+  // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+  // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+  var isNonPhrasingTag = makeMap(
+    'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
+    'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
+    'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
+    'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
+    'title,tr,track'
+  );
+
+  /**
+   * Not type-checking this file because it's mostly vendor code.
+   */
+
+  // Regular Expressions for parsing tags and attributes
+  var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+  var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+  var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
+  var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
+  var startTagOpen = new RegExp(("^<" + qnameCapture));
+  var startTagClose = /^\s*(\/?)>/;
+  var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
+  var doctype = /^<!DOCTYPE [^>]+>/i;
+  // #7298: escape - to avoid being passed as HTML comment when inlined in page
+  var comment = /^<!\--/;
+  var conditionalComment = /^<!\[/;
+
+  // Special Elements (can contain anything)
+  var isPlainTextElement = makeMap('script,style,textarea', true);
+  var reCache = {};
+
+  var decodingMap = {
+    '&lt;': '<',
+    '&gt;': '>',
+    '&quot;': '"',
+    '&amp;': '&',
+    '&#10;': '\n',
+    '&#9;': '\t',
+    '&#39;': "'"
+  };
+  var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+  var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
+
+  // #5992
+  var isIgnoreNewlineTag = makeMap('pre,textarea', true);
+  var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
+
+  function decodeAttr (value, shouldDecodeNewlines) {
+    var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
+    return value.replace(re, function (match) { return decodingMap[match]; })
+  }
+
+  function parseHTML (html, options) {
+    var stack = [];
+    var expectHTML = options.expectHTML;
+    var isUnaryTag$$1 = options.isUnaryTag || no;
+    var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
+    var index = 0;
+    var last, lastTag;
+    while (html) {
+      last = html;
+      // Make sure we're not in a plaintext content element like script/style
+      if (!lastTag || !isPlainTextElement(lastTag)) {
+        var textEnd = html.indexOf('<');
+        if (textEnd === 0) {
+          // Comment:
+          if (comment.test(html)) {
+            var commentEnd = html.indexOf('-->');
+
+            if (commentEnd >= 0) {
+              if (options.shouldKeepComment) {
+                options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
+              }
+              advance(commentEnd + 3);
+              continue
+            }
+          }
+
+          // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+          if (conditionalComment.test(html)) {
+            var conditionalEnd = html.indexOf(']>');
+
+            if (conditionalEnd >= 0) {
+              advance(conditionalEnd + 2);
+              continue
+            }
+          }
+
+          // Doctype:
+          var doctypeMatch = html.match(doctype);
+          if (doctypeMatch) {
+            advance(doctypeMatch[0].length);
+            continue
+          }
+
+          // End tag:
+          var endTagMatch = html.match(endTag);
+          if (endTagMatch) {
+            var curIndex = index;
+            advance(endTagMatch[0].length);
+            parseEndTag(endTagMatch[1], curIndex, index);
+            continue
+          }
+
+          // Start tag:
+          var startTagMatch = parseStartTag();
+          if (startTagMatch) {
+            handleStartTag(startTagMatch);
+            if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
+              advance(1);
+            }
+            continue
+          }
+        }
+
+        var text = (void 0), rest = (void 0), next = (void 0);
+        if (textEnd >= 0) {
+          rest = html.slice(textEnd);
+          while (
+            !endTag.test(rest) &&
+            !startTagOpen.test(rest) &&
+            !comment.test(rest) &&
+            !conditionalComment.test(rest)
+          ) {
+            // < in plain text, be forgiving and treat it as text
+            next = rest.indexOf('<', 1);
+            if (next < 0) { break }
+            textEnd += next;
+            rest = html.slice(textEnd);
+          }
+          text = html.substring(0, textEnd);
+        }
+
+        if (textEnd < 0) {
+          text = html;
+        }
+
+        if (text) {
+          advance(text.length);
+        }
+
+        if (options.chars && text) {
+          options.chars(text, index - text.length, index);
+        }
+      } else {
+        var endTagLength = 0;
+        var stackedTag = lastTag.toLowerCase();
+        var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
+        var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
+          endTagLength = endTag.length;
+          if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
+            text = text
+              .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
+              .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+          }
+          if (shouldIgnoreFirstNewline(stackedTag, text)) {
+            text = text.slice(1);
+          }
+          if (options.chars) {
+            options.chars(text);
+          }
+          return ''
+        });
+        index += html.length - rest$1.length;
+        html = rest$1;
+        parseEndTag(stackedTag, index - endTagLength, index);
+      }
+
+      if (html === last) {
+        options.chars && options.chars(html);
+        if (!stack.length && options.warn) {
+          options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
+        }
+        break
+      }
+    }
+
+    // Clean up any remaining tags
+    parseEndTag();
+
+    function advance (n) {
+      index += n;
+      html = html.substring(n);
+    }
+
+    function parseStartTag () {
+      var start = html.match(startTagOpen);
+      if (start) {
+        var match = {
+          tagName: start[1],
+          attrs: [],
+          start: index
+        };
+        advance(start[0].length);
+        var end, attr;
+        while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+          attr.start = index;
+          advance(attr[0].length);
+          attr.end = index;
+          match.attrs.push(attr);
+        }
+        if (end) {
+          match.unarySlash = end[1];
+          advance(end[0].length);
+          match.end = index;
+          return match
+        }
+      }
+    }
+
+    function handleStartTag (match) {
+      var tagName = match.tagName;
+      var unarySlash = match.unarySlash;
+
+      if (expectHTML) {
+        if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
+          parseEndTag(lastTag);
+        }
+        if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
+          parseEndTag(tagName);
+        }
+      }
+
+      var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+
+      var l = match.attrs.length;
+      var attrs = new Array(l);
+      for (var i = 0; i < l; i++) {
+        var args = match.attrs[i];
+        var value = args[3] || args[4] || args[5] || '';
+        var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
+          ? options.shouldDecodeNewlinesForHref
+          : options.shouldDecodeNewlines;
+        attrs[i] = {
+          name: args[1],
+          value: decodeAttr(value, shouldDecodeNewlines)
+        };
+        if (options.outputSourceRange) {
+          attrs[i].start = args.start + args[0].match(/^\s*/).length;
+          attrs[i].end = args.end;
+        }
+      }
+
+      if (!unary) {
+        stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
+        lastTag = tagName;
+      }
+
+      if (options.start) {
+        options.start(tagName, attrs, unary, match.start, match.end);
+      }
+    }
+
+    function parseEndTag (tagName, start, end) {
+      var pos, lowerCasedTagName;
+      if (start == null) { start = index; }
+      if (end == null) { end = index; }
+
+      // Find the closest opened tag of the same type
+      if (tagName) {
+        lowerCasedTagName = tagName.toLowerCase();
+        for (pos = stack.length - 1; pos >= 0; pos--) {
+          if (stack[pos].lowerCasedTag === lowerCasedTagName) {
+            break
+          }
+        }
+      } else {
+        // If no tag name is provided, clean shop
+        pos = 0;
+      }
+
+      if (pos >= 0) {
+        // Close all the open elements, up the stack
+        for (var i = stack.length - 1; i >= pos; i--) {
+          if (i > pos || !tagName &&
+            options.warn
+          ) {
+            options.warn(
+              ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+              { start: stack[i].start, end: stack[i].end }
+            );
+          }
+          if (options.end) {
+            options.end(stack[i].tag, start, end);
+          }
+        }
+
+        // Remove the open elements from the stack
+        stack.length = pos;
+        lastTag = pos && stack[pos - 1].tag;
+      } else if (lowerCasedTagName === 'br') {
+        if (options.start) {
+          options.start(tagName, [], true, start, end);
+        }
+      } else if (lowerCasedTagName === 'p') {
+        if (options.start) {
+          options.start(tagName, [], false, start, end);
+        }
+        if (options.end) {
+          options.end(tagName, start, end);
+        }
+      }
+    }
+  }
+
+  /*  */
+
+  var onRE = /^@|^v-on:/;
+  var dirRE = /^v-|^@|^:|^#/;
+  var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
+  var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
+  var stripParensRE = /^\(|\)$/g;
+  var dynamicArgRE = /^\[.*\]$/;
+
+  var argRE = /:(.*)$/;
+  var bindRE = /^:|^\.|^v-bind:/;
+  var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+  var slotRE = /^v-slot(:|$)|^#/;
+
+  var lineBreakRE = /[\r\n]/;
+  var whitespaceRE$1 = /[ \f\t\r\n]+/g;
+
+  var invalidAttributeRE = /[\s"'<>\/=]/;
+
+  var decodeHTMLCached = cached(he.decode);
+
+  var emptySlotScopeToken = "_empty_";
+
+  // configurable state
+  var warn$2;
+  var delimiters;
+  var transforms;
+  var preTransforms;
+  var postTransforms;
+  var platformIsPreTag;
+  var platformMustUseProp;
+  var platformGetTagNamespace;
+  var maybeComponent;
+
+  function createASTElement (
+    tag,
+    attrs,
+    parent
+  ) {
+    return {
+      type: 1,
+      tag: tag,
+      attrsList: attrs,
+      attrsMap: makeAttrsMap(attrs),
+      rawAttrsMap: {},
+      parent: parent,
+      children: []
+    }
+  }
+
+  /**
+   * Convert HTML string to AST.
+   */
+  function parse (
+    template,
+    options
+  ) {
+    warn$2 = options.warn || baseWarn;
+
+    platformIsPreTag = options.isPreTag || no;
+    platformMustUseProp = options.mustUseProp || no;
+    platformGetTagNamespace = options.getTagNamespace || no;
+    var isReservedTag = options.isReservedTag || no;
+    maybeComponent = function (el) { return !!(
+      el.component ||
+      el.attrsMap[':is'] ||
+      el.attrsMap['v-bind:is'] ||
+      !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+    ); };
+    transforms = pluckModuleFunction(options.modules, 'transformNode');
+    preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
+    postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
+
+    delimiters = options.delimiters;
+
+    var stack = [];
+    var preserveWhitespace = options.preserveWhitespace !== false;
+    var whitespaceOption = options.whitespace;
+    var root;
+    var currentParent;
+    var inVPre = false;
+    var inPre = false;
+    var warned = false;
+
+    function warnOnce (msg, range) {
+      if (!warned) {
+        warned = true;
+        warn$2(msg, range);
+      }
+    }
+
+    function closeElement (element) {
+      trimEndingWhitespace(element);
+      if (!inVPre && !element.processed) {
+        element = processElement(element, options);
+      }
+      // tree management
+      if (!stack.length && element !== root) {
+        // allow root elements with v-if, v-else-if and v-else
+        if (root.if && (element.elseif || element.else)) {
+          {
+            checkRootConstraints(element);
+          }
+          addIfCondition(root, {
+            exp: element.elseif,
+            block: element
+          });
+        } else {
+          warnOnce(
+            "Component template should contain exactly one root element. " +
+            "If you are using v-if on multiple elements, " +
+            "use v-else-if to chain them instead.",
+            { start: element.start }
+          );
+        }
+      }
+      if (currentParent && !element.forbidden) {
+        if (element.elseif || element.else) {
+          processIfConditions(element, currentParent);
+        } else {
+          if (element.slotScope) {
+            // scoped slot
+            // keep it in the children list so that v-else(-if) conditions can
+            // find it as the prev node.
+            var name = element.slotTarget || '"default"'
+            ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+          }
+          currentParent.children.push(element);
+          element.parent = currentParent;
+        }
+      }
+
+      // final children cleanup
+      // filter out scoped slots
+      element.children = element.children.filter(function (c) { return !(c).slotScope; });
+      // remove trailing whitespace node again
+      trimEndingWhitespace(element);
+
+      // check pre state
+      if (element.pre) {
+        inVPre = false;
+      }
+      if (platformIsPreTag(element.tag)) {
+        inPre = false;
+      }
+      // apply post-transforms
+      for (var i = 0; i < postTransforms.length; i++) {
+        postTransforms[i](element, options);
+      }
+    }
+
+    function trimEndingWhitespace (el) {
+      // remove trailing whitespace node
+      if (!inPre) {
+        var lastNode;
+        while (
+          (lastNode = el.children[el.children.length - 1]) &&
+          lastNode.type === 3 &&
+          lastNode.text === ' '
+        ) {
+          el.children.pop();
+        }
+      }
+    }
+
+    function checkRootConstraints (el) {
+      if (el.tag === 'slot' || el.tag === 'template') {
+        warnOnce(
+          "Cannot use <" + (el.tag) + "> as component root element because it may " +
+          'contain multiple nodes.',
+          { start: el.start }
+        );
+      }
+      if (el.attrsMap.hasOwnProperty('v-for')) {
+        warnOnce(
+          'Cannot use v-for on stateful component root element because ' +
+          'it renders multiple elements.',
+          el.rawAttrsMap['v-for']
+        );
+      }
+    }
+
+    parseHTML(template, {
+      warn: warn$2,
+      expectHTML: options.expectHTML,
+      isUnaryTag: options.isUnaryTag,
+      canBeLeftOpenTag: options.canBeLeftOpenTag,
+      shouldDecodeNewlines: options.shouldDecodeNewlines,
+      shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
+      shouldKeepComment: options.comments,
+      outputSourceRange: options.outputSourceRange,
+      start: function start (tag, attrs, unary, start$1, end) {
+        // check namespace.
+        // inherit parent ns if there is one
+        var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
+
+        // handle IE svg bug
+        /* istanbul ignore if */
+        if (isIE && ns === 'svg') {
+          attrs = guardIESVGBug(attrs);
+        }
+
+        var element = createASTElement(tag, attrs, currentParent);
+        if (ns) {
+          element.ns = ns;
+        }
+
+        {
+          if (options.outputSourceRange) {
+            element.start = start$1;
+            element.end = end;
+            element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+              cumulated[attr.name] = attr;
+              return cumulated
+            }, {});
+          }
+          attrs.forEach(function (attr) {
+            if (invalidAttributeRE.test(attr.name)) {
+              warn$2(
+                "Invalid dynamic argument expression: attribute names cannot contain " +
+                "spaces, quotes, <, >, / or =.",
+                {
+                  start: attr.start + attr.name.indexOf("["),
+                  end: attr.start + attr.name.length
+                }
+              );
+            }
+          });
+        }
+
+        if (isForbiddenTag(element) && !isServerRendering()) {
+          element.forbidden = true;
+          warn$2(
+            'Templates should only be responsible for mapping the state to the ' +
+            'UI. Avoid placing tags with side-effects in your templates, such as ' +
+            "<" + tag + ">" + ', as they will not be parsed.',
+            { start: element.start }
+          );
+        }
+
+        // apply pre-transforms
+        for (var i = 0; i < preTransforms.length; i++) {
+          element = preTransforms[i](element, options) || element;
+        }
+
+        if (!inVPre) {
+          processPre(element);
+          if (element.pre) {
+            inVPre = true;
+          }
+        }
+        if (platformIsPreTag(element.tag)) {
+          inPre = true;
+        }
+        if (inVPre) {
+          processRawAttrs(element);
+        } else if (!element.processed) {
+          // structural directives
+          processFor(element);
+          processIf(element);
+          processOnce(element);
+        }
+
+        if (!root) {
+          root = element;
+          {
+            checkRootConstraints(root);
+          }
+        }
+
+        if (!unary) {
+          currentParent = element;
+          stack.push(element);
+        } else {
+          closeElement(element);
+        }
+      },
+
+      end: function end (tag, start, end$1) {
+        var element = stack[stack.length - 1];
+        // pop stack
+        stack.length -= 1;
+        currentParent = stack[stack.length - 1];
+        if (options.outputSourceRange) {
+          element.end = end$1;
+        }
+        closeElement(element);
+      },
+
+      chars: function chars (text, start, end) {
+        if (!currentParent) {
+          {
+            if (text === template) {
+              warnOnce(
+                'Component template requires a root element, rather than just text.',
+                { start: start }
+              );
+            } else if ((text = text.trim())) {
+              warnOnce(
+                ("text \"" + text + "\" outside root element will be ignored."),
+                { start: start }
+              );
+            }
+          }
+          return
+        }
+        // IE textarea placeholder bug
+        /* istanbul ignore if */
+        if (isIE &&
+          currentParent.tag === 'textarea' &&
+          currentParent.attrsMap.placeholder === text
+        ) {
+          return
+        }
+        var children = currentParent.children;
+        if (inPre || text.trim()) {
+          text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+        } else if (!children.length) {
+          // remove the whitespace-only node right after an opening tag
+          text = '';
+        } else if (whitespaceOption) {
+          if (whitespaceOption === 'condense') {
+            // in condense mode, remove the whitespace node if it contains
+            // line break, otherwise condense to a single space
+            text = lineBreakRE.test(text) ? '' : ' ';
+          } else {
+            text = ' ';
+          }
+        } else {
+          text = preserveWhitespace ? ' ' : '';
+        }
+        if (text) {
+          if (!inPre && whitespaceOption === 'condense') {
+            // condense consecutive whitespaces into single space
+            text = text.replace(whitespaceRE$1, ' ');
+          }
+          var res;
+          var child;
+          if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
+            child = {
+              type: 2,
+              expression: res.expression,
+              tokens: res.tokens,
+              text: text
+            };
+          } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
+            child = {
+              type: 3,
+              text: text
+            };
+          }
+          if (child) {
+            if (options.outputSourceRange) {
+              child.start = start;
+              child.end = end;
+            }
+            children.push(child);
+          }
+        }
+      },
+      comment: function comment (text, start, end) {
+        // adding anything as a sibling to the root node is forbidden
+        // comments should still be allowed, but ignored
+        if (currentParent) {
+          var child = {
+            type: 3,
+            text: text,
+            isComment: true
+          };
+          if (options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          currentParent.children.push(child);
+        }
+      }
+    });
+    return root
+  }
+
+  function processPre (el) {
+    if (getAndRemoveAttr(el, 'v-pre') != null) {
+      el.pre = true;
+    }
+  }
+
+  function processRawAttrs (el) {
+    var list = el.attrsList;
+    var len = list.length;
+    if (len) {
+      var attrs = el.attrs = new Array(len);
+      for (var i = 0; i < len; i++) {
+        attrs[i] = {
+          name: list[i].name,
+          value: JSON.stringify(list[i].value)
+        };
+        if (list[i].start != null) {
+          attrs[i].start = list[i].start;
+          attrs[i].end = list[i].end;
+        }
+      }
+    } else if (!el.pre) {
+      // non root node in pre blocks with no attributes
+      el.plain = true;
+    }
+  }
+
+  function processElement (
+    element,
+    options
+  ) {
+    processKey(element);
+
+    // determine whether this is a plain element after
+    // removing structural attributes
+    element.plain = (
+      !element.key &&
+      !element.scopedSlots &&
+      !element.attrsList.length
+    );
+
+    processRef(element);
+    processSlotContent(element);
+    processSlotOutlet(element);
+    processComponent(element);
+    for (var i = 0; i < transforms.length; i++) {
+      element = transforms[i](element, options) || element;
+    }
+    processAttrs(element);
+    return element
+  }
+
+  function processKey (el) {
+    var exp = getBindingAttr(el, 'key');
+    if (exp) {
+      {
+        if (el.tag === 'template') {
+          warn$2(
+            "<template> cannot be keyed. Place the key on real elements instead.",
+            getRawBindingAttr(el, 'key')
+          );
+        }
+        if (el.for) {
+          var iterator = el.iterator2 || el.iterator1;
+          var parent = el.parent;
+          if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+            warn$2(
+              "Do not use v-for index as key on <transition-group> children, " +
+              "this is the same as not using keys.",
+              getRawBindingAttr(el, 'key'),
+              true /* tip */
+            );
+          }
+        }
+      }
+      el.key = exp;
+    }
+  }
+
+  function processRef (el) {
+    var ref = getBindingAttr(el, 'ref');
+    if (ref) {
+      el.ref = ref;
+      el.refInFor = checkInFor(el);
+    }
+  }
+
+  function processFor (el) {
+    var exp;
+    if ((exp = getAndRemoveAttr(el, 'v-for'))) {
+      var res = parseFor(exp);
+      if (res) {
+        extend(el, res);
+      } else {
+        warn$2(
+          ("Invalid v-for expression: " + exp),
+          el.rawAttrsMap['v-for']
+        );
+      }
+    }
+  }
+
+
+
+  function parseFor (exp) {
+    var inMatch = exp.match(forAliasRE);
+    if (!inMatch) { return }
+    var res = {};
+    res.for = inMatch[2].trim();
+    var alias = inMatch[1].trim().replace(stripParensRE, '');
+    var iteratorMatch = alias.match(forIteratorRE);
+    if (iteratorMatch) {
+      res.alias = alias.replace(forIteratorRE, '').trim();
+      res.iterator1 = iteratorMatch[1].trim();
+      if (iteratorMatch[2]) {
+        res.iterator2 = iteratorMatch[2].trim();
+      }
+    } else {
+      res.alias = alias;
+    }
+    return res
+  }
+
+  function processIf (el) {
+    var exp = getAndRemoveAttr(el, 'v-if');
+    if (exp) {
+      el.if = exp;
+      addIfCondition(el, {
+        exp: exp,
+        block: el
+      });
+    } else {
+      if (getAndRemoveAttr(el, 'v-else') != null) {
+        el.else = true;
+      }
+      var elseif = getAndRemoveAttr(el, 'v-else-if');
+      if (elseif) {
+        el.elseif = elseif;
+      }
+    }
+  }
+
+  function processIfConditions (el, parent) {
+    var prev = findPrevElement(parent.children);
+    if (prev && prev.if) {
+      addIfCondition(prev, {
+        exp: el.elseif,
+        block: el
+      });
+    } else {
+      warn$2(
+        "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
+        "used on element <" + (el.tag) + "> without corresponding v-if.",
+        el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
+      );
+    }
+  }
+
+  function findPrevElement (children) {
+    var i = children.length;
+    while (i--) {
+      if (children[i].type === 1) {
+        return children[i]
+      } else {
+        if (children[i].text !== ' ') {
+          warn$2(
+            "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
+            "will be ignored.",
+            children[i]
+          );
+        }
+        children.pop();
+      }
+    }
+  }
+
+  function addIfCondition (el, condition) {
+    if (!el.ifConditions) {
+      el.ifConditions = [];
+    }
+    el.ifConditions.push(condition);
+  }
+
+  function processOnce (el) {
+    var once$$1 = getAndRemoveAttr(el, 'v-once');
+    if (once$$1 != null) {
+      el.once = true;
+    }
+  }
+
+  // handle content being passed to a component as slot,
+  // e.g. <template slot="xxx">, <div slot-scope="xxx">
+  function processSlotContent (el) {
+    var slotScope;
+    if (el.tag === 'template') {
+      slotScope = getAndRemoveAttr(el, 'scope');
+      /* istanbul ignore if */
+      if (slotScope) {
+        warn$2(
+          "the \"scope\" attribute for scoped slots have been deprecated and " +
+          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+          "can also be used on plain elements in addition to <template> to " +
+          "denote scoped slots.",
+          el.rawAttrsMap['scope'],
+          true
+        );
+      }
+      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if (el.attrsMap['v-for']) {
+        warn$2(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          el.rawAttrsMap['slot-scope'],
+          true
+        );
+      }
+      el.slotScope = slotScope;
+    }
+
+    // slot="xxx"
+    var slotTarget = getBindingAttr(el, 'slot');
+    if (slotTarget) {
+      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+      el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+      // preserve slot as an attribute for native shadow DOM compat
+      // only for non-scoped slots.
+      if (el.tag !== 'template' && !el.slotScope) {
+        addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+      }
+    }
+
+    // 2.6 v-slot syntax
+    {
+      if (el.tag === 'template') {
+        // v-slot on <template>
+        var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+        if (slotBinding) {
+          {
+            if (el.slotTarget || el.slotScope) {
+              warn$2(
+                "Unexpected mixed usage of different slot syntaxes.",
+                el
+              );
+            }
+            if (el.parent && !maybeComponent(el.parent)) {
+              warn$2(
+                "<template v-slot> can only appear at the root level inside " +
+                "the receiving component",
+                el
+              );
+            }
+          }
+          var ref = getSlotName(slotBinding);
+          var name = ref.name;
+          var dynamic = ref.dynamic;
+          el.slotTarget = name;
+          el.slotTargetDynamic = dynamic;
+          el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
+        }
+      } else {
+        // v-slot on component, denotes default slot
+        var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+        if (slotBinding$1) {
+          {
+            if (!maybeComponent(el)) {
+              warn$2(
+                "v-slot can only be used on components or <template>.",
+                slotBinding$1
+              );
+            }
+            if (el.slotScope || el.slotTarget) {
+              warn$2(
+                "Unexpected mixed usage of different slot syntaxes.",
+                el
+              );
+            }
+            if (el.scopedSlots) {
+              warn$2(
+                "To avoid scope ambiguity, the default slot should also use " +
+                "<template> syntax when there are other named slots.",
+                slotBinding$1
+              );
+            }
+          }
+          // add the component's children to its default slot
+          var slots = el.scopedSlots || (el.scopedSlots = {});
+          var ref$1 = getSlotName(slotBinding$1);
+          var name$1 = ref$1.name;
+          var dynamic$1 = ref$1.dynamic;
+          var slotContainer = slots[name$1] = createASTElement('template', [], el);
+          slotContainer.slotTarget = name$1;
+          slotContainer.slotTargetDynamic = dynamic$1;
+          slotContainer.children = el.children.filter(function (c) {
+            if (!c.slotScope) {
+              c.parent = slotContainer;
+              return true
+            }
+          });
+          slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+          // remove children as they are returned from scopedSlots now
+          el.children = [];
+          // mark el non-plain so data gets generated
+          el.plain = false;
+        }
+      }
+    }
+  }
+
+  function getSlotName (binding) {
+    var name = binding.name.replace(slotRE, '');
+    if (!name) {
+      if (binding.name[0] !== '#') {
+        name = 'default';
+      } else {
+        warn$2(
+          "v-slot shorthand syntax requires a slot name.",
+          binding
+        );
+      }
+    }
+    return dynamicArgRE.test(name)
+      // dynamic [name]
+      ? { name: name.slice(1, -1), dynamic: true }
+      // static name
+      : { name: ("\"" + name + "\""), dynamic: false }
+  }
+
+  // handle <slot/> outlets
+  function processSlotOutlet (el) {
+    if (el.tag === 'slot') {
+      el.slotName = getBindingAttr(el, 'name');
+      if (el.key) {
+        warn$2(
+          "`key` does not work on <slot> because slots are abstract outlets " +
+          "and can possibly expand into multiple elements. " +
+          "Use the key on a wrapping element instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+    }
+  }
+
+  function processComponent (el) {
+    var binding;
+    if ((binding = getBindingAttr(el, 'is'))) {
+      el.component = binding;
+    }
+    if (getAndRemoveAttr(el, 'inline-template') != null) {
+      el.inlineTemplate = true;
+    }
+  }
+
+  function processAttrs (el) {
+    var list = el.attrsList;
+    var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
+    for (i = 0, l = list.length; i < l; i++) {
+      name = rawName = list[i].name;
+      value = list[i].value;
+      if (dirRE.test(name)) {
+        // mark element as dynamic
+        el.hasBindings = true;
+        // modifiers
+        modifiers = parseModifiers(name.replace(dirRE, ''));
+        // support .foo shorthand syntax for the .prop modifier
+        if (modifiers) {
+          name = name.replace(modifierRE, '');
+        }
+        if (bindRE.test(name)) { // v-bind
+          name = name.replace(bindRE, '');
+          value = parseFilters(value);
+          isDynamic = dynamicArgRE.test(name);
+          if (isDynamic) {
+            name = name.slice(1, -1);
+          }
+          if (
+            value.trim().length === 0
+          ) {
+            warn$2(
+              ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+            );
+          }
+          if (modifiers) {
+            if (modifiers.prop && !isDynamic) {
+              name = camelize(name);
+              if (name === 'innerHtml') { name = 'innerHTML'; }
+            }
+            if (modifiers.camel && !isDynamic) {
+              name = camelize(name);
+            }
+            if (modifiers.sync) {
+              syncGen = genAssignmentCode(value, "$event");
+              if (!isDynamic) {
+                addHandler(
+                  el,
+                  ("update:" + (camelize(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$2,
+                  list[i]
+                );
+                if (hyphenate(name) !== camelize(name)) {
+                  addHandler(
+                    el,
+                    ("update:" + (hyphenate(name))),
+                    syncGen,
+                    null,
+                    false,
+                    warn$2,
+                    list[i]
+                  );
+                }
+              } else {
+                // handler w/ dynamic event name
+                addHandler(
+                  el,
+                  ("\"update:\"+(" + name + ")"),
+                  syncGen,
+                  null,
+                  false,
+                  warn$2,
+                  list[i],
+                  true // dynamic
+                );
+              }
+            }
+          }
+          if ((modifiers && modifiers.prop) || (
+            !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
+          )) {
+            addProp(el, name, value, list[i], isDynamic);
+          } else {
+            addAttr(el, name, value, list[i], isDynamic);
+          }
+        } else if (onRE.test(name)) { // v-on
+          name = name.replace(onRE, '');
+          isDynamic = dynamicArgRE.test(name);
+          if (isDynamic) {
+            name = name.slice(1, -1);
+          }
+          addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
+        } else { // normal directives
+          name = name.replace(dirRE, '');
+          // parse arg
+          var argMatch = name.match(argRE);
+          var arg = argMatch && argMatch[1];
+          isDynamic = false;
+          if (arg) {
+            name = name.slice(0, -(arg.length + 1));
+            if (dynamicArgRE.test(arg)) {
+              arg = arg.slice(1, -1);
+              isDynamic = true;
+            }
+          }
+          addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
+          if (name === 'model') {
+            checkForAliasModel(el, value);
+          }
+        }
+      } else {
+        // literal attribute
+        {
+          var res = parseText(value, delimiters);
+          if (res) {
+            warn$2(
+              name + "=\"" + value + "\": " +
+              'Interpolation inside attributes has been removed. ' +
+              'Use v-bind or the colon shorthand instead. For example, ' +
+              'instead of <div id="{{ val }}">, use <div :id="val">.',
+              list[i]
+            );
+          }
+        }
+        addAttr(el, name, JSON.stringify(value), list[i]);
+        // #6887 firefox doesn't update muted state if set via attribute
+        // even immediately after element creation
+        if (!el.component &&
+            name === 'muted' &&
+            platformMustUseProp(el.tag, el.attrsMap.type, name)) {
+          addProp(el, name, 'true', list[i]);
+        }
+      }
+    }
+  }
+
+  function checkInFor (el) {
+    var parent = el;
+    while (parent) {
+      if (parent.for !== undefined) {
+        return true
+      }
+      parent = parent.parent;
+    }
+    return false
+  }
+
+  function parseModifiers (name) {
+    var match = name.match(modifierRE);
+    if (match) {
+      var ret = {};
+      match.forEach(function (m) { ret[m.slice(1)] = true; });
+      return ret
+    }
+  }
+
+  function makeAttrsMap (attrs) {
+    var map = {};
+    for (var i = 0, l = attrs.length; i < l; i++) {
+      if (
+        map[attrs[i].name] && !isIE && !isEdge
+      ) {
+        warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
+      }
+      map[attrs[i].name] = attrs[i].value;
+    }
+    return map
+  }
+
+  // for script (e.g. type="x/template") or style, do not decode content
+  function isTextTag (el) {
+    return el.tag === 'script' || el.tag === 'style'
+  }
+
+  function isForbiddenTag (el) {
+    return (
+      el.tag === 'style' ||
+      (el.tag === 'script' && (
+        !el.attrsMap.type ||
+        el.attrsMap.type === 'text/javascript'
+      ))
+    )
+  }
+
+  var ieNSBug = /^xmlns:NS\d+/;
+  var ieNSPrefix = /^NS\d+:/;
+
+  /* istanbul ignore next */
+  function guardIESVGBug (attrs) {
+    var res = [];
+    for (var i = 0; i < attrs.length; i++) {
+      var attr = attrs[i];
+      if (!ieNSBug.test(attr.name)) {
+        attr.name = attr.name.replace(ieNSPrefix, '');
+        res.push(attr);
+      }
+    }
+    return res
+  }
+
+  function checkForAliasModel (el, value) {
+    var _el = el;
+    while (_el) {
+      if (_el.for && _el.alias === value) {
+        warn$2(
+          "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+          "You are binding v-model directly to a v-for iteration alias. " +
+          "This will not be able to modify the v-for source array because " +
+          "writing to the alias is like modifying a function local variable. " +
+          "Consider using an array of objects and use v-model on an object property instead.",
+          el.rawAttrsMap['v-model']
+        );
+      }
+      _el = _el.parent;
+    }
+  }
+
+  /*  */
+
+  function preTransformNode (el, options) {
+    if (el.tag === 'input') {
+      var map = el.attrsMap;
+      if (!map['v-model']) {
+        return
+      }
+
+      var typeBinding;
+      if (map[':type'] || map['v-bind:type']) {
+        typeBinding = getBindingAttr(el, 'type');
+      }
+      if (!map.type && !typeBinding && map['v-bind']) {
+        typeBinding = "(" + (map['v-bind']) + ").type";
+      }
+
+      if (typeBinding) {
+        var ifCondition = getAndRemoveAttr(el, 'v-if', true);
+        var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
+        var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
+        var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
+        // 1. checkbox
+        var branch0 = cloneASTElement(el);
+        // process for on the main node
+        processFor(branch0);
+        addRawAttr(branch0, 'type', 'checkbox');
+        processElement(branch0, options);
+        branch0.processed = true; // prevent it from double-processed
+        branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
+        addIfCondition(branch0, {
+          exp: branch0.if,
+          block: branch0
+        });
+        // 2. add radio else-if condition
+        var branch1 = cloneASTElement(el);
+        getAndRemoveAttr(branch1, 'v-for', true);
+        addRawAttr(branch1, 'type', 'radio');
+        processElement(branch1, options);
+        addIfCondition(branch0, {
+          exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
+          block: branch1
+        });
+        // 3. other
+        var branch2 = cloneASTElement(el);
+        getAndRemoveAttr(branch2, 'v-for', true);
+        addRawAttr(branch2, ':type', typeBinding);
+        processElement(branch2, options);
+        addIfCondition(branch0, {
+          exp: ifCondition,
+          block: branch2
+        });
+
+        if (hasElse) {
+          branch0.else = true;
+        } else if (elseIfCondition) {
+          branch0.elseif = elseIfCondition;
+        }
+
+        return branch0
+      }
+    }
+  }
+
+  function cloneASTElement (el) {
+    return createASTElement(el.tag, el.attrsList.slice(), el.parent)
+  }
+
+  var model$1 = {
+    preTransformNode: preTransformNode
+  };
+
+  var modules$1 = [
+    klass$1,
+    style$1,
+    model$1
+  ];
+
+  /*  */
+
+  function text (el, dir) {
+    if (dir.value) {
+      addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
+    }
+  }
+
+  /*  */
+
+  function html (el, dir) {
+    if (dir.value) {
+      addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
+    }
+  }
+
+  var directives$1 = {
+    model: model,
+    text: text,
+    html: html
+  };
+
+  /*  */
+
+  var baseOptions = {
+    expectHTML: true,
+    modules: modules$1,
+    directives: directives$1,
+    isPreTag: isPreTag,
+    isUnaryTag: isUnaryTag,
+    mustUseProp: mustUseProp,
+    canBeLeftOpenTag: canBeLeftOpenTag,
+    isReservedTag: isReservedTag,
+    getTagNamespace: getTagNamespace,
+    staticKeys: genStaticKeys(modules$1)
+  };
+
+  /*  */
+
+  var isStaticKey;
+  var isPlatformReservedTag;
+
+  var genStaticKeysCached = cached(genStaticKeys$1);
+
+  /**
+   * Goal of the optimizer: walk the generated template AST tree
+   * and detect sub-trees that are purely static, i.e. parts of
+   * the DOM that never needs to change.
+   *
+   * Once we detect these sub-trees, we can:
+   *
+   * 1. Hoist them into constants, so that we no longer need to
+   *    create fresh nodes for them on each re-render;
+   * 2. Completely skip them in the patching process.
+   */
+  function optimize (root, options) {
+    if (!root) { return }
+    isStaticKey = genStaticKeysCached(options.staticKeys || '');
+    isPlatformReservedTag = options.isReservedTag || no;
+    // first pass: mark all non-static nodes.
+    markStatic$1(root);
+    // second pass: mark static roots.
+    markStaticRoots(root, false);
+  }
+
+  function genStaticKeys$1 (keys) {
+    return makeMap(
+      'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
+      (keys ? ',' + keys : '')
+    )
+  }
+
+  function markStatic$1 (node) {
+    node.static = isStatic(node);
+    if (node.type === 1) {
+      // do not make component slot content static. this avoids
+      // 1. components not able to mutate slot nodes
+      // 2. static slot content fails for hot-reloading
+      if (
+        !isPlatformReservedTag(node.tag) &&
+        node.tag !== 'slot' &&
+        node.attrsMap['inline-template'] == null
+      ) {
+        return
+      }
+      for (var i = 0, l = node.children.length; i < l; i++) {
+        var child = node.children[i];
+        markStatic$1(child);
+        if (!child.static) {
+          node.static = false;
+        }
+      }
+      if (node.ifConditions) {
+        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+          var block = node.ifConditions[i$1].block;
+          markStatic$1(block);
+          if (!block.static) {
+            node.static = false;
+          }
+        }
+      }
+    }
+  }
+
+  function markStaticRoots (node, isInFor) {
+    if (node.type === 1) {
+      if (node.static || node.once) {
+        node.staticInFor = isInFor;
+      }
+      // For a node to qualify as a static root, it should have children that
+      // are not just static text. Otherwise the cost of hoisting out will
+      // outweigh the benefits and it's better off to just always render it fresh.
+      if (node.static && node.children.length && !(
+        node.children.length === 1 &&
+        node.children[0].type === 3
+      )) {
+        node.staticRoot = true;
+        return
+      } else {
+        node.staticRoot = false;
+      }
+      if (node.children) {
+        for (var i = 0, l = node.children.length; i < l; i++) {
+          markStaticRoots(node.children[i], isInFor || !!node.for);
+        }
+      }
+      if (node.ifConditions) {
+        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+          markStaticRoots(node.ifConditions[i$1].block, isInFor);
+        }
+      }
+    }
+  }
+
+  function isStatic (node) {
+    if (node.type === 2) { // expression
+      return false
+    }
+    if (node.type === 3) { // text
+      return true
+    }
+    return !!(node.pre || (
+      !node.hasBindings && // no dynamic bindings
+      !node.if && !node.for && // not v-if or v-for or v-else
+      !isBuiltInTag(node.tag) && // not a built-in
+      isPlatformReservedTag(node.tag) && // not a component
+      !isDirectChildOfTemplateFor(node) &&
+      Object.keys(node).every(isStaticKey)
+    ))
+  }
+
+  function isDirectChildOfTemplateFor (node) {
+    while (node.parent) {
+      node = node.parent;
+      if (node.tag !== 'template') {
+        return false
+      }
+      if (node.for) {
+        return true
+      }
+    }
+    return false
+  }
+
+  /*  */
+
+  var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+  var fnInvokeRE = /\([^)]*?\);*$/;
+  var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
+
+  // KeyboardEvent.keyCode aliases
+  var keyCodes = {
+    esc: 27,
+    tab: 9,
+    enter: 13,
+    space: 32,
+    up: 38,
+    left: 37,
+    right: 39,
+    down: 40,
+    'delete': [8, 46]
+  };
+
+  // KeyboardEvent.key aliases
+  var keyNames = {
+    // #7880: IE11 and Edge use `Esc` for Escape key name.
+    esc: ['Esc', 'Escape'],
+    tab: 'Tab',
+    enter: 'Enter',
+    // #9112: IE11 uses `Spacebar` for Space key name.
+    space: [' ', 'Spacebar'],
+    // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+    up: ['Up', 'ArrowUp'],
+    left: ['Left', 'ArrowLeft'],
+    right: ['Right', 'ArrowRight'],
+    down: ['Down', 'ArrowDown'],
+    // #9112: IE11 uses `Del` for Delete key name.
+    'delete': ['Backspace', 'Delete', 'Del']
+  };
+
+  // #4868: modifiers that prevent the execution of the listener
+  // need to explicitly return null so that we can determine whether to remove
+  // the listener for .once
+  var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
+
+  var modifierCode = {
+    stop: '$event.stopPropagation();',
+    prevent: '$event.preventDefault();',
+    self: genGuard("$event.target !== $event.currentTarget"),
+    ctrl: genGuard("!$event.ctrlKey"),
+    shift: genGuard("!$event.shiftKey"),
+    alt: genGuard("!$event.altKey"),
+    meta: genGuard("!$event.metaKey"),
+    left: genGuard("'button' in $event && $event.button !== 0"),
+    middle: genGuard("'button' in $event && $event.button !== 1"),
+    right: genGuard("'button' in $event && $event.button !== 2")
+  };
+
+  function genHandlers (
+    events,
+    isNative
+  ) {
+    var prefix = isNative ? 'nativeOn:' : 'on:';
+    var staticHandlers = "";
+    var dynamicHandlers = "";
+    for (var name in events) {
+      var handlerCode = genHandler(events[name]);
+      if (events[name] && events[name].dynamic) {
+        dynamicHandlers += name + "," + handlerCode + ",";
+      } else {
+        staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+      }
+    }
+    staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+    if (dynamicHandlers) {
+      return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+    } else {
+      return prefix + staticHandlers
+    }
+  }
+
+  function genHandler (handler) {
+    if (!handler) {
+      return 'function(){}'
+    }
+
+    if (Array.isArray(handler)) {
+      return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
+    }
+
+    var isMethodPath = simplePathRE.test(handler.value);
+    var isFunctionExpression = fnExpRE.test(handler.value);
+    var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
+
+    if (!handler.modifiers) {
+      if (isMethodPath || isFunctionExpression) {
+        return handler.value
+      }
+      return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
+    } else {
+      var code = '';
+      var genModifierCode = '';
+      var keys = [];
+      for (var key in handler.modifiers) {
+        if (modifierCode[key]) {
+          genModifierCode += modifierCode[key];
+          // left/right
+          if (keyCodes[key]) {
+            keys.push(key);
+          }
+        } else if (key === 'exact') {
+          var modifiers = (handler.modifiers);
+          genModifierCode += genGuard(
+            ['ctrl', 'shift', 'alt', 'meta']
+              .filter(function (keyModifier) { return !modifiers[keyModifier]; })
+              .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
+              .join('||')
+          );
+        } else {
+          keys.push(key);
+        }
+      }
+      if (keys.length) {
+        code += genKeyFilter(keys);
+      }
+      // Make sure modifiers like prevent and stop get executed after key filtering
+      if (genModifierCode) {
+        code += genModifierCode;
+      }
+      var handlerCode = isMethodPath
+        ? ("return " + (handler.value) + ".apply(null, arguments)")
+        : isFunctionExpression
+          ? ("return (" + (handler.value) + ").apply(null, arguments)")
+          : isFunctionInvocation
+            ? ("return " + (handler.value))
+            : handler.value;
+      return ("function($event){" + code + handlerCode + "}")
+    }
+  }
+
+  function genKeyFilter (keys) {
+    return (
+      // make sure the key filters only apply to KeyboardEvents
+      // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+      // key events that do not have keyCode property...
+      "if(!$event.type.indexOf('key')&&" +
+      (keys.map(genFilterCode).join('&&')) + ")return null;"
+    )
+  }
+
+  function genFilterCode (key) {
+    var keyVal = parseInt(key, 10);
+    if (keyVal) {
+      return ("$event.keyCode!==" + keyVal)
+    }
+    var keyCode = keyCodes[key];
+    var keyName = keyNames[key];
+    return (
+      "_k($event.keyCode," +
+      (JSON.stringify(key)) + "," +
+      (JSON.stringify(keyCode)) + "," +
+      "$event.key," +
+      "" + (JSON.stringify(keyName)) +
+      ")"
+    )
+  }
+
+  /*  */
+
+  function on (el, dir) {
+    if (dir.modifiers) {
+      warn("v-on without argument does not support modifiers.");
+    }
+    el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
+  }
+
+  /*  */
+
+  function bind$1 (el, dir) {
+    el.wrapData = function (code) {
+      return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
+    };
+  }
+
+  /*  */
+
+  var baseDirectives = {
+    on: on,
+    bind: bind$1,
+    cloak: noop
+  };
+
+  /*  */
+
+
+
+
+
+  var CodegenState = function CodegenState (options) {
+    this.options = options;
+    this.warn = options.warn || baseWarn;
+    this.transforms = pluckModuleFunction(options.modules, 'transformCode');
+    this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
+    this.directives = extend(extend({}, baseDirectives), options.directives);
+    var isReservedTag = options.isReservedTag || no;
+    this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
+    this.onceId = 0;
+    this.staticRenderFns = [];
+    this.pre = false;
+  };
+
+
+
+  function generate (
+    ast,
+    options
+  ) {
+    var state = new CodegenState(options);
+    // fix #11483, Root level <script> tags should not be rendered.
+    var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
+    return {
+      render: ("with(this){return " + code + "}"),
+      staticRenderFns: state.staticRenderFns
+    }
+  }
+
+  function genElement (el, state) {
+    if (el.parent) {
+      el.pre = el.pre || el.parent.pre;
+    }
+
+    if (el.staticRoot && !el.staticProcessed) {
+      return genStatic(el, state)
+    } else if (el.once && !el.onceProcessed) {
+      return genOnce(el, state)
+    } else if (el.for && !el.forProcessed) {
+      return genFor(el, state)
+    } else if (el.if && !el.ifProcessed) {
+      return genIf(el, state)
+    } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
+      return genChildren(el, state) || 'void 0'
+    } else if (el.tag === 'slot') {
+      return genSlot(el, state)
+    } else {
+      // component or element
+      var code;
+      if (el.component) {
+        code = genComponent(el.component, el, state);
+      } else {
+        var data;
+        if (!el.plain || (el.pre && state.maybeComponent(el))) {
+          data = genData$2(el, state);
+        }
+
+        var children = el.inlineTemplate ? null : genChildren(el, state, true);
+        code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+      }
+      // module transforms
+      for (var i = 0; i < state.transforms.length; i++) {
+        code = state.transforms[i](el, code);
+      }
+      return code
+    }
+  }
+
+  // hoist static sub-trees out
+  function genStatic (el, state) {
+    el.staticProcessed = true;
+    // Some elements (templates) need to behave differently inside of a v-pre
+    // node.  All pre nodes are static roots, so we can use this as a location to
+    // wrap a state change and reset it upon exiting the pre node.
+    var originalPreState = state.pre;
+    if (el.pre) {
+      state.pre = el.pre;
+    }
+    state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+    state.pre = originalPreState;
+    return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
+  }
+
+  // v-once
+  function genOnce (el, state) {
+    el.onceProcessed = true;
+    if (el.if && !el.ifProcessed) {
+      return genIf(el, state)
+    } else if (el.staticInFor) {
+      var key = '';
+      var parent = el.parent;
+      while (parent) {
+        if (parent.for) {
+          key = parent.key;
+          break
+        }
+        parent = parent.parent;
+      }
+      if (!key) {
+        state.warn(
+          "v-once can only be used inside v-for that is keyed. ",
+          el.rawAttrsMap['v-once']
+        );
+        return genElement(el, state)
+      }
+      return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
+    } else {
+      return genStatic(el, state)
+    }
+  }
+
+  function genIf (
+    el,
+    state,
+    altGen,
+    altEmpty
+  ) {
+    el.ifProcessed = true; // avoid recursion
+    return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
+  }
+
+  function genIfConditions (
+    conditions,
+    state,
+    altGen,
+    altEmpty
+  ) {
+    if (!conditions.length) {
+      return altEmpty || '_e()'
+    }
+
+    var condition = conditions.shift();
+    if (condition.exp) {
+      return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
+    } else {
+      return ("" + (genTernaryExp(condition.block)))
+    }
+
+    // v-if with v-once should generate code like (a)?_m(0):_m(1)
+    function genTernaryExp (el) {
+      return altGen
+        ? altGen(el, state)
+        : el.once
+          ? genOnce(el, state)
+          : genElement(el, state)
+    }
+  }
+
+  function genFor (
+    el,
+    state,
+    altGen,
+    altHelper
+  ) {
+    var exp = el.for;
+    var alias = el.alias;
+    var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
+    var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+
+    if (state.maybeComponent(el) &&
+      el.tag !== 'slot' &&
+      el.tag !== 'template' &&
+      !el.key
+    ) {
+      state.warn(
+        "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
+        "v-for should have explicit keys. " +
+        "See https://vuejs.org/guide/list.html#key for more info.",
+        el.rawAttrsMap['v-for'],
+        true /* tip */
+      );
+    }
+
+    el.forProcessed = true; // avoid recursion
+    return (altHelper || '_l') + "((" + exp + ")," +
+      "function(" + alias + iterator1 + iterator2 + "){" +
+        "return " + ((altGen || genElement)(el, state)) +
+      '})'
+  }
+
+  function genData$2 (el, state) {
+    var data = '{';
+
+    // directives first.
+    // directives may mutate the el's other properties before they are generated.
+    var dirs = genDirectives(el, state);
+    if (dirs) { data += dirs + ','; }
+
+    // key
+    if (el.key) {
+      data += "key:" + (el.key) + ",";
+    }
+    // ref
+    if (el.ref) {
+      data += "ref:" + (el.ref) + ",";
+    }
+    if (el.refInFor) {
+      data += "refInFor:true,";
+    }
+    // pre
+    if (el.pre) {
+      data += "pre:true,";
+    }
+    // record original tag name for components using "is" attribute
+    if (el.component) {
+      data += "tag:\"" + (el.tag) + "\",";
+    }
+    // module data generation functions
+    for (var i = 0; i < state.dataGenFns.length; i++) {
+      data += state.dataGenFns[i](el);
+    }
+    // attributes
+    if (el.attrs) {
+      data += "attrs:" + (genProps(el.attrs)) + ",";
+    }
+    // DOM props
+    if (el.props) {
+      data += "domProps:" + (genProps(el.props)) + ",";
+    }
+    // event handlers
+    if (el.events) {
+      data += (genHandlers(el.events, false)) + ",";
+    }
+    if (el.nativeEvents) {
+      data += (genHandlers(el.nativeEvents, true)) + ",";
+    }
+    // slot target
+    // only for non-scoped slots
+    if (el.slotTarget && !el.slotScope) {
+      data += "slot:" + (el.slotTarget) + ",";
+    }
+    // scoped slots
+    if (el.scopedSlots) {
+      data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
+    }
+    // component v-model
+    if (el.model) {
+      data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
+    }
+    // inline-template
+    if (el.inlineTemplate) {
+      var inlineTemplate = genInlineTemplate(el, state);
+      if (inlineTemplate) {
+        data += inlineTemplate + ",";
+      }
+    }
+    data = data.replace(/,$/, '') + '}';
+    // v-bind dynamic argument wrap
+    // v-bind with dynamic arguments must be applied using the same v-bind object
+    // merge helper so that class/style/mustUseProp attrs are handled correctly.
+    if (el.dynamicAttrs) {
+      data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+    }
+    // v-bind data wrap
+    if (el.wrapData) {
+      data = el.wrapData(data);
+    }
+    // v-on data wrap
+    if (el.wrapListeners) {
+      data = el.wrapListeners(data);
+    }
+    return data
+  }
+
+  function genDirectives (el, state) {
+    var dirs = el.directives;
+    if (!dirs) { return }
+    var res = 'directives:[';
+    var hasRuntime = false;
+    var i, l, dir, needRuntime;
+    for (i = 0, l = dirs.length; i < l; i++) {
+      dir = dirs[i];
+      needRuntime = true;
+      var gen = state.directives[dir.name];
+      if (gen) {
+        // compile-time directive that manipulates AST.
+        // returns true if it also needs a runtime counterpart.
+        needRuntime = !!gen(el, dir, state.warn);
+      }
+      if (needRuntime) {
+        hasRuntime = true;
+        res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+      }
+    }
+    if (hasRuntime) {
+      return res.slice(0, -1) + ']'
+    }
+  }
+
+  function genInlineTemplate (el, state) {
+    var ast = el.children[0];
+    if (el.children.length !== 1 || ast.type !== 1) {
+      state.warn(
+        'Inline-template components must have exactly one child element.',
+        { start: el.start }
+      );
+    }
+    if (ast && ast.type === 1) {
+      var inlineRenderFns = generate(ast, state.options);
+      return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
+    }
+  }
+
+  function genScopedSlots (
+    el,
+    slots,
+    state
+  ) {
+    // by default scoped slots are considered "stable", this allows child
+    // components with only scoped slots to skip forced updates from parent.
+    // but in some cases we have to bail-out of this optimization
+    // for example if the slot contains dynamic names, has v-if or v-for on them...
+    var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+      var slot = slots[key];
+      return (
+        slot.slotTargetDynamic ||
+        slot.if ||
+        slot.for ||
+        containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+      )
+    });
+
+    // #9534: if a component with scoped slots is inside a conditional branch,
+    // it's possible for the same component to be reused but with different
+    // compiled slot content. To avoid that, we generate a unique key based on
+    // the generated code of all the slot contents.
+    var needsKey = !!el.if;
+
+    // OR when it is inside another scoped slot or v-for (the reactivity may be
+    // disconnected due to the intermediate scope variable)
+    // #9438, #9506
+    // TODO: this can be further optimized by properly analyzing in-scope bindings
+    // and skip force updating ones that do not actually use scope variables.
+    if (!needsForceUpdate) {
+      var parent = el.parent;
+      while (parent) {
+        if (
+          (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+          parent.for
+        ) {
+          needsForceUpdate = true;
+          break
+        }
+        if (parent.if) {
+          needsKey = true;
+        }
+        parent = parent.parent;
+      }
+    }
+
+    var generatedSlots = Object.keys(slots)
+      .map(function (key) { return genScopedSlot(slots[key], state); })
+      .join(',');
+
+    return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+  }
+
+  function hash(str) {
+    var hash = 5381;
+    var i = str.length;
+    while(i) {
+      hash = (hash * 33) ^ str.charCodeAt(--i);
+    }
+    return hash >>> 0
+  }
+
+  function containsSlotChild (el) {
+    if (el.type === 1) {
+      if (el.tag === 'slot') {
+        return true
+      }
+      return el.children.some(containsSlotChild)
+    }
+    return false
+  }
+
+  function genScopedSlot (
+    el,
+    state
+  ) {
+    var isLegacySyntax = el.attrsMap['slot-scope'];
+    if (el.if && !el.ifProcessed && !isLegacySyntax) {
+      return genIf(el, state, genScopedSlot, "null")
+    }
+    if (el.for && !el.forProcessed) {
+      return genFor(el, state, genScopedSlot)
+    }
+    var slotScope = el.slotScope === emptySlotScopeToken
+      ? ""
+      : String(el.slotScope);
+    var fn = "function(" + slotScope + "){" +
+      "return " + (el.tag === 'template'
+        ? el.if && isLegacySyntax
+          ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
+          : genChildren(el, state) || 'undefined'
+        : genElement(el, state)) + "}";
+    // reverse proxy v-slot without scope on this.$slots
+    var reverseProxy = slotScope ? "" : ",proxy:true";
+    return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
+  }
+
+  function genChildren (
+    el,
+    state,
+    checkSkip,
+    altGenElement,
+    altGenNode
+  ) {
+    var children = el.children;
+    if (children.length) {
+      var el$1 = children[0];
+      // optimize single v-for
+      if (children.length === 1 &&
+        el$1.for &&
+        el$1.tag !== 'template' &&
+        el$1.tag !== 'slot'
+      ) {
+        var normalizationType = checkSkip
+          ? state.maybeComponent(el$1) ? ",1" : ",0"
+          : "";
+        return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
+      }
+      var normalizationType$1 = checkSkip
+        ? getNormalizationType(children, state.maybeComponent)
+        : 0;
+      var gen = altGenNode || genNode;
+      return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
+    }
+  }
+
+  // determine the normalization needed for the children array.
+  // 0: no normalization needed
+  // 1: simple normalization needed (possible 1-level deep nested array)
+  // 2: full normalization needed
+  function getNormalizationType (
+    children,
+    maybeComponent
+  ) {
+    var res = 0;
+    for (var i = 0; i < children.length; i++) {
+      var el = children[i];
+      if (el.type !== 1) {
+        continue
+      }
+      if (needsNormalization(el) ||
+          (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
+        res = 2;
+        break
+      }
+      if (maybeComponent(el) ||
+          (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
+        res = 1;
+      }
+    }
+    return res
+  }
+
+  function needsNormalization (el) {
+    return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
+  }
+
+  function genNode (node, state) {
+    if (node.type === 1) {
+      return genElement(node, state)
+    } else if (node.type === 3 && node.isComment) {
+      return genComment(node)
+    } else {
+      return genText(node)
+    }
+  }
+
+  function genText (text) {
+    return ("_v(" + (text.type === 2
+      ? text.expression // no need for () because already wrapped in _s()
+      : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
+  }
+
+  function genComment (comment) {
+    return ("_e(" + (JSON.stringify(comment.text)) + ")")
+  }
+
+  function genSlot (el, state) {
+    var slotName = el.slotName || '"default"';
+    var children = genChildren(el, state);
+    var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
+    var attrs = el.attrs || el.dynamicAttrs
+      ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+          // slot props are camelized
+          name: camelize(attr.name),
+          value: attr.value,
+          dynamic: attr.dynamic
+        }); }))
+      : null;
+    var bind$$1 = el.attrsMap['v-bind'];
+    if ((attrs || bind$$1) && !children) {
+      res += ",null";
+    }
+    if (attrs) {
+      res += "," + attrs;
+    }
+    if (bind$$1) {
+      res += (attrs ? '' : ',null') + "," + bind$$1;
+    }
+    return res + ')'
+  }
+
+  // componentName is el.component, take it as argument to shun flow's pessimistic refinement
+  function genComponent (
+    componentName,
+    el,
+    state
+  ) {
+    var children = el.inlineTemplate ? null : genChildren(el, state, true);
+    return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
+  }
+
+  function genProps (props) {
+    var staticProps = "";
+    var dynamicProps = "";
+    for (var i = 0; i < props.length; i++) {
+      var prop = props[i];
+      var value = transformSpecialNewlines(prop.value);
+      if (prop.dynamic) {
+        dynamicProps += (prop.name) + "," + value + ",";
+      } else {
+        staticProps += "\"" + (prop.name) + "\":" + value + ",";
+      }
+    }
+    staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+    if (dynamicProps) {
+      return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+    } else {
+      return staticProps
+    }
+  }
+
+  // #3895, #4268
+  function transformSpecialNewlines (text) {
+    return text
+      .replace(/\u2028/g, '\\u2028')
+      .replace(/\u2029/g, '\\u2029')
+  }
+
+  /*  */
+
+
+
+  // these keywords should not appear inside expressions, but operators like
+  // typeof, instanceof and in are allowed
+  var prohibitedKeywordRE = new RegExp('\\b' + (
+    'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
+    'super,throw,while,yield,delete,export,import,return,switch,default,' +
+    'extends,finally,continue,debugger,function,arguments'
+  ).split(',').join('\\b|\\b') + '\\b');
+
+  // these unary operators should not be used as property/method names
+  var unaryOperatorsRE = new RegExp('\\b' + (
+    'delete,typeof,void'
+  ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+
+  // strip strings in expressions
+  var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+
+  // detect problematic expressions in a template
+  function detectErrors (ast, warn) {
+    if (ast) {
+      checkNode(ast, warn);
+    }
+  }
+
+  function checkNode (node, warn) {
+    if (node.type === 1) {
+      for (var name in node.attrsMap) {
+        if (dirRE.test(name)) {
+          var value = node.attrsMap[name];
+          if (value) {
+            var range = node.rawAttrsMap[name];
+            if (name === 'v-for') {
+              checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+            } else if (name === 'v-slot' || name[0] === '#') {
+              checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
+            } else if (onRE.test(name)) {
+              checkEvent(value, (name + "=\"" + value + "\""), warn, range);
+            } else {
+              checkExpression(value, (name + "=\"" + value + "\""), warn, range);
+            }
+          }
+        }
+      }
+      if (node.children) {
+        for (var i = 0; i < node.children.length; i++) {
+          checkNode(node.children[i], warn);
+        }
+      }
+    } else if (node.type === 2) {
+      checkExpression(node.expression, node.text, warn, node);
+    }
+  }
+
+  function checkEvent (exp, text, warn, range) {
+    var stripped = exp.replace(stripStringRE, '');
+    var keywordMatch = stripped.match(unaryOperatorsRE);
+    if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+      warn(
+        "avoid using JavaScript unary operator as property name: " +
+        "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+        range
+      );
+    }
+    checkExpression(exp, text, warn, range);
+  }
+
+  function checkFor (node, text, warn, range) {
+    checkExpression(node.for || '', text, warn, range);
+    checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+    checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+    checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
+  }
+
+  function checkIdentifier (
+    ident,
+    type,
+    text,
+    warn,
+    range
+  ) {
+    if (typeof ident === 'string') {
+      try {
+        new Function(("var " + ident + "=_"));
+      } catch (e) {
+        warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
+      }
+    }
+  }
+
+  function checkExpression (exp, text, warn, range) {
+    try {
+      new Function(("return " + exp));
+    } catch (e) {
+      var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
+      if (keywordMatch) {
+        warn(
+          "avoid using JavaScript keyword as property name: " +
+          "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+          range
+        );
+      } else {
+        warn(
+          "invalid expression: " + (e.message) + " in\n\n" +
+          "    " + exp + "\n\n" +
+          "  Raw expression: " + (text.trim()) + "\n",
+          range
+        );
+      }
+    }
+  }
+
+  function checkFunctionParameterExpression (exp, text, warn, range) {
+    try {
+      new Function(exp, '');
+    } catch (e) {
+      warn(
+        "invalid function parameter expression: " + (e.message) + " in\n\n" +
+        "    " + exp + "\n\n" +
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
+      );
+    }
+  }
+
+  /*  */
+
+  var range = 2;
+
+  function generateCodeFrame (
+    source,
+    start,
+    end
+  ) {
+    if ( start === void 0 ) start = 0;
+    if ( end === void 0 ) end = source.length;
+
+    var lines = source.split(/\r?\n/);
+    var count = 0;
+    var res = [];
+    for (var i = 0; i < lines.length; i++) {
+      count += lines[i].length + 1;
+      if (count >= start) {
+        for (var j = i - range; j <= i + range || end > count; j++) {
+          if (j < 0 || j >= lines.length) { continue }
+          res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+          var lineLength = lines[j].length;
+          if (j === i) {
+            // push underline
+            var pad = start - (count - lineLength) + 1;
+            var length = end > count ? lineLength - pad : end - start;
+            res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+          } else if (j > i) {
+            if (end > count) {
+              var length$1 = Math.min(end - count, lineLength);
+              res.push("   |  " + repeat$1("^", length$1));
+            }
+            count += lineLength + 1;
+          }
+        }
+        break
+      }
+    }
+    return res.join('\n')
+  }
+
+  function repeat$1 (str, n) {
+    var result = '';
+    if (n > 0) {
+      while (true) { // eslint-disable-line
+        if (n & 1) { result += str; }
+        n >>>= 1;
+        if (n <= 0) { break }
+        str += str;
+      }
+    }
+    return result
+  }
+
+  /*  */
+
+
+
+  function createFunction (code, errors) {
+    try {
+      return new Function(code)
+    } catch (err) {
+      errors.push({ err: err, code: code });
+      return noop
+    }
+  }
+
+  function createCompileToFunctionFn (compile) {
+    var cache = Object.create(null);
+
+    return function compileToFunctions (
+      template,
+      options,
+      vm
+    ) {
+      options = extend({}, options);
+      var warn$$1 = options.warn || warn;
+      delete options.warn;
+
+      /* istanbul ignore if */
+      {
+        // detect possible CSP restriction
+        try {
+          new Function('return 1');
+        } catch (e) {
+          if (e.toString().match(/unsafe-eval|CSP/)) {
+            warn$$1(
+              'It seems you are using the standalone build of Vue.js in an ' +
+              'environment with Content Security Policy that prohibits unsafe-eval. ' +
+              'The template compiler cannot work in this environment. Consider ' +
+              'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
+              'templates into render functions.'
+            );
+          }
+        }
+      }
+
+      // check cache
+      var key = options.delimiters
+        ? String(options.delimiters) + template
+        : template;
+      if (cache[key]) {
+        return cache[key]
+      }
+
+      // compile
+      var compiled = compile(template, options);
+
+      // check compilation errors/tips
+      {
+        if (compiled.errors && compiled.errors.length) {
+          if (options.outputSourceRange) {
+            compiled.errors.forEach(function (e) {
+              warn$$1(
+                "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+                generateCodeFrame(template, e.start, e.end),
+                vm
+              );
+            });
+          } else {
+            warn$$1(
+              "Error compiling template:\n\n" + template + "\n\n" +
+              compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+              vm
+            );
+          }
+        }
+        if (compiled.tips && compiled.tips.length) {
+          if (options.outputSourceRange) {
+            compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+          } else {
+            compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+          }
+        }
+      }
+
+      // turn code into functions
+      var res = {};
+      var fnGenErrors = [];
+      res.render = createFunction(compiled.render, fnGenErrors);
+      res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
+        return createFunction(code, fnGenErrors)
+      });
+
+      // check function generation errors.
+      // this should only happen if there is a bug in the compiler itself.
+      // mostly for codegen development use
+      /* istanbul ignore if */
+      {
+        if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
+          warn$$1(
+            "Failed to generate render function:\n\n" +
+            fnGenErrors.map(function (ref) {
+              var err = ref.err;
+              var code = ref.code;
+
+              return ((err.toString()) + " in\n\n" + code + "\n");
+          }).join('\n'),
+            vm
+          );
+        }
+      }
+
+      return (cache[key] = res)
+    }
+  }
+
+  /*  */
+
+  function createCompilerCreator (baseCompile) {
+    return function createCompiler (baseOptions) {
+      function compile (
+        template,
+        options
+      ) {
+        var finalOptions = Object.create(baseOptions);
+        var errors = [];
+        var tips = [];
+
+        var warn = function (msg, range, tip) {
+          (tip ? tips : errors).push(msg);
+        };
+
+        if (options) {
+          if (options.outputSourceRange) {
+            // $flow-disable-line
+            var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+            warn = function (msg, range, tip) {
+              var data = { msg: msg };
+              if (range) {
+                if (range.start != null) {
+                  data.start = range.start + leadingSpaceLength;
+                }
+                if (range.end != null) {
+                  data.end = range.end + leadingSpaceLength;
+                }
+              }
+              (tip ? tips : errors).push(data);
+            };
+          }
+          // merge custom modules
+          if (options.modules) {
+            finalOptions.modules =
+              (baseOptions.modules || []).concat(options.modules);
+          }
+          // merge custom directives
+          if (options.directives) {
+            finalOptions.directives = extend(
+              Object.create(baseOptions.directives || null),
+              options.directives
+            );
+          }
+          // copy other options
+          for (var key in options) {
+            if (key !== 'modules' && key !== 'directives') {
+              finalOptions[key] = options[key];
+            }
+          }
+        }
+
+        finalOptions.warn = warn;
+
+        var compiled = baseCompile(template.trim(), finalOptions);
+        {
+          detectErrors(compiled.ast, warn);
+        }
+        compiled.errors = errors;
+        compiled.tips = tips;
+        return compiled
+      }
+
+      return {
+        compile: compile,
+        compileToFunctions: createCompileToFunctionFn(compile)
+      }
+    }
+  }
+
+  /*  */
+
+  // `createCompilerCreator` allows creating compilers that use alternative
+  // parser/optimizer/codegen, e.g the SSR optimizing compiler.
+  // Here we just export a default compiler using the default parts.
+  var createCompiler = createCompilerCreator(function baseCompile (
+    template,
+    options
+  ) {
+    var ast = parse(template.trim(), options);
+    if (options.optimize !== false) {
+      optimize(ast, options);
+    }
+    var code = generate(ast, options);
+    return {
+      ast: ast,
+      render: code.render,
+      staticRenderFns: code.staticRenderFns
+    }
+  });
+
+  /*  */
+
+  var ref$1 = createCompiler(baseOptions);
+  var compile = ref$1.compile;
+  var compileToFunctions = ref$1.compileToFunctions;
+
+  /*  */
+
+  // check whether current browser encodes a char inside attribute values
+  var div;
+  function getShouldDecode (href) {
+    div = div || document.createElement('div');
+    div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
+    return div.innerHTML.indexOf('&#10;') > 0
+  }
+
+  // #3663: IE encodes newlines inside attribute values while other browsers don't
+  var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
+  // #6828: chrome encodes content in a[href]
+  var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
+
+  /*  */
+
+  var idToTemplate = cached(function (id) {
+    var el = query(id);
+    return el && el.innerHTML
+  });
+
+  var mount = Vue.prototype.$mount;
+  Vue.prototype.$mount = function (
+    el,
+    hydrating
+  ) {
+    el = el && query(el);
+
+    /* istanbul ignore if */
+    if (el === document.body || el === document.documentElement) {
+      warn(
+        "Do not mount Vue to <html> or <body> - mount to normal elements instead."
+      );
+      return this
+    }
+
+    var options = this.$options;
+    // resolve template/el and convert to render function
+    if (!options.render) {
+      var template = options.template;
+      if (template) {
+        if (typeof template === 'string') {
+          if (template.charAt(0) === '#') {
+            template = idToTemplate(template);
+            /* istanbul ignore if */
+            if (!template) {
+              warn(
+                ("Template element not found or is empty: " + (options.template)),
+                this
+              );
+            }
+          }
+        } else if (template.nodeType) {
+          template = template.innerHTML;
+        } else {
+          {
+            warn('invalid template option:' + template, this);
+          }
+          return this
+        }
+      } else if (el) {
+        template = getOuterHTML(el);
+      }
+      if (template) {
+        /* istanbul ignore if */
+        if (config.performance && mark) {
+          mark('compile');
+        }
+
+        var ref = compileToFunctions(template, {
+          outputSourceRange: "development" !== 'production',
+          shouldDecodeNewlines: shouldDecodeNewlines,
+          shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
+          delimiters: options.delimiters,
+          comments: options.comments
+        }, this);
+        var render = ref.render;
+        var staticRenderFns = ref.staticRenderFns;
+        options.render = render;
+        options.staticRenderFns = staticRenderFns;
+
+        /* istanbul ignore if */
+        if (config.performance && mark) {
+          mark('compile end');
+          measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
+        }
+      }
+    }
+    return mount.call(this, el, hydrating)
+  };
+
+  /**
+   * Get outerHTML of elements, taking care
+   * of SVG elements in IE as well.
+   */
+  function getOuterHTML (el) {
+    if (el.outerHTML) {
+      return el.outerHTML
+    } else {
+      var container = document.createElement('div');
+      container.appendChild(el.cloneNode(true));
+      return container.innerHTML
+    }
+  }
+
+  Vue.compile = compileToFunctions;
 
   return Vue;
 
-}));
\ No newline at end of file
+}));
diff --git a/panel/index.js b/panel/index.js
index 36b497c..d97ea71 100644
--- a/panel/index.js
+++ b/panel/index.js
@@ -1,5 +1,6 @@
 const PACKAGE_NAME = "uuidconvert";
 const fs = require("fs");
+const vue = Editor.require(`packages://${PACKAGE_NAME}/lib/vue.js`);
 
 Editor.Panel.extend({
     style: fs.readFileSync(Editor.url(`packages://${PACKAGE_NAME}/static/style/default/index.css`), 'utf-8')
@@ -13,7 +14,7 @@ Editor.Panel.extend({
     },
 
     ready() {
-        this.app = new Vue({
+        this.app = new vue({
             el: this.$app,
             created: function () {