cocos-enhance-kit/adapters/common/engine/globalAdapter/BaseSystemInfo.js

function adaptSys (sys, env) {
    if (!env) {
        env = __globalAdapter.getSystemInfoSync();
    }

    var language = env.language || '';
    var system = env.system || 'iOS';
    var platform = env.platform || 'iOS';

    sys.isNative = false;
    sys.isBrowser = false;
    sys.isMobile = true;
    sys.language = language.substr(0, 2);
    sys.languageCode = language.toLowerCase();

    platform = platform.toLowerCase();
    if (platform === "android") {
        sys.os = sys.OS_ANDROID;
    }
    else if (platform === "ios") {
        sys.os = sys.OS_IOS;
    }

    system = system.toLowerCase();
    // Adaptation to Android P
    if (system === 'android p') {
        system = 'android p 9.0';
    }

    var version = /[\d\.]+/.exec(system);
    sys.osVersion = version ? version[0] : system;
    sys.osMainVersion = parseInt(sys.osVersion);
    sys.browserType = null;
    sys.browserVersion = null;

    var w = env.windowWidth;
    var h = env.windowHeight;
    var ratio = env.pixelRatio || 1;
    sys.windowPixelResolution = {
        width: ratio * w,
        height: ratio * h
    };

    sys.localStorage = window.localStorage;

    var _supportWebGL = __globalAdapter.isSubContext ? false : true;;
    var _supportWebp = false;
    try {
        var _canvas = document.createElement("canvas");
        _supportWebp = _canvas.toDataURL('image/webp').startsWith('data:image/webp');
    }
    catch (err) { }

    sys.capabilities = {
        "canvas": true,
        "opengl": !!_supportWebGL,
        "webp": _supportWebp
    };
    sys.__audioSupport = {
        ONLY_ONE: false,
        WEB_AUDIO: false,
        DELAY_CREATE_CTX: false,
        format: ['.mp3']
    };
}

module.exports = adaptSys;