Runtime

// @tag core

// @define Ext.Boot

​

var Ext = Ext || {};

​

//<editor-fold desc="Boot">

/**

 * @class Ext.Boot

 * @singleton

 * @private

 */

Ext.Boot = Ext.Boot || (function (emptyFn) {

​

    var doc = document,

        _emptyArray = [],

        _config = {

            /**

             * @cfg {Boolean} [disableCaching=true]

             * If `true` current timestamp is added to script URL's to prevent caching.

             * In debug builds, adding a "cache" or "disableCacheBuster" query parameter

             * to the page's URL will set this to `false`.

             */

            disableCaching: (/[?&](?:cache|disableCacheBuster)\b/i.test(location.search) ||

                !(/http[s]?\:/i.test(location.href)) ||

                /(^|[ ;])ext-cache=1/.test(doc.cookie)) ? false :

                true,

​

            /**

             * @cfg {String} [disableCachingParam="_dc"]

             * The query parameter name for the cache buster's timestamp.

             */

            disableCachingParam: '_dc',

​

            /**

             * @cfg {Boolean} loadDelay

             * Millisecond delay between asynchronous script injection (prevents stack

             * overflow on some user agents) 'false' disables delay but potentially

             * increases stack load.

             */

            loadDelay: false,

​

            /**

             * @cfg {Boolean} preserveScripts

             * `false` to remove asynchronously loaded scripts, `true` to retain script

             * element for browser debugger compatibility and improved load performance.

             */

            preserveScripts: true,

​

            /**

             * @cfg {String} [charset=UTF-8]

             * Optional charset to specify encoding of dynamic content.

             */

            charset: 'UTF-8'

        },

​

        _assetConfig= {},

​

        cssRe = /\.css(?:\?|$)/i,

        resolverEl = doc.createElement('a'),

        isBrowser = typeof window !== 'undefined',

        _environment = {

            browser: isBrowser,

            node: !isBrowser && (typeof require === 'function'),