* Delegates event to a selector. * * @param {Element} element * @param {String} selector * @param {String} type * @param {Function} callback * @

* @param {Noty} ref * @return {void}

* @param {Noty} ref * @return {void}

* Returns the user's preferred language from the browser * * @return string|null the preferred language from the browser or NULL */

* Cache name Getter * * @return void */

* Cache file extension Getter * * @return string */

* @param {Noty} ref * @return {boolean}

* Checks if the server specified in the url exists. * * @param $url url to check * @return true, if the server exists; false otherwise

* Adds an event listener to a HTML element * and returns a remove listener function. * * @param {HTMLElement} node * @param {String} type * @para

* Add an event listener to a list of HTML elements * and returns a remove listener function. * * @param {NodeList|HTMLCollection} nodeList * @para

* Add an event listener to a selector * and returns a remove listener function. * * @param {String} selector * @param {String} type * @param {Fun

* Finds closest match and invokes callback. * * @param {Element} element * @param {String} selector * @param {String} type * @param {Function} ca