* Support testing using an element * @param {Function} fn Passed the created element and returns a boolean result

* Mark a function for special use by Sizzle * @param {Function} fn The function to mark

* Returns a function to use in pseudos for positionals * @param {Function} fn

* Create key-value caches of limited size * @returns {function(string, object)} Returns the Object data after storing it on itself with * property n

* Adds the same handler for all of the specified attrs * @param {String} attrs Pipe-separated list of attributes * @param {Function} handler The met

* Checks a node for validity as a Sizzle context * @param {Element|Object=} context * @returns {Element|Object|Boolean} The input node if acceptable

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* 检测磁盘空间, 必要时清理空间并清空队列queue

* Returns a function to use in pseudos for :enabled/:disabled * @param {Boolean} disabled true for :disabled; false for :enabled

* Checks document order of two siblings * @param {Element} a * @param {Element} b * @returns {Number} Returns less than 0 if a precedes b, greater

* 在以下形式的字符串中捕获字幕: * Language Name Formats <= 返回0, 继续 * gu vtt, ttml, srv3, srv2, srv1 * zh-Hans vtt, ttml, srv3, srv2, srv1 * en E

* Returns a function to use in pseudos for buttons * @param {String} type

* Returns a function to use in pseudos for input types * @param {String} type

* 同步解析字幕 * @param {{ op: 'parse', url: String, videoID: String }} msg