[adapters] 增加小游戏适配部分源码

adapters/platforms/bytedance/wrapper/builtin/HTMLElement.js

@@ -0,0 +1,54 @@
+import Element from './Element'
+import { noop } from './util/index.js'
+import { innerWidth, innerHeight } from './WindowProperties'
+
+export default class HTMLElement extends Element {
+  className = ''
+  childern = []
+  style = {
+    width: `${innerWidth}px`,
+    height: `${innerHeight}px`
+  }
+
+  insertBefore = noop
+
+  innerHTML = ''
+
+  constructor(tagName = '') {
+    super()
+    this.tagName = tagName.toUpperCase()
+  }
+
+  setAttribute(name, value) {
+    this[name] = value
+  }
+
+  getAttribute(name) {
+    return this[name]
+  }
+
+  get clientWidth() {
+    const ret = parseInt(this.style.fontSize, 10) * this.innerHTML.length
+
+    return Number.isNaN(ret) ? 0 : ret
+  }
+
+  get clientHeight() {
+    const ret = parseInt(this.style.fontSize, 10)
+
+    return Number.isNaN(ret) ? 0 : ret
+  }
+
+  getBoundingClientRect() {
+    return {
+      top: 0,
+      left: 0,
+      width: innerWidth,
+      height: innerHeight
+    }
+  }
+
+  focus() {
+
+  }
+}