WordPress/wp-includes/js/mediaelement/wp-mediaelement.js

/* global _wpmejsSettings */
(function( window, $ ) {

	window.wp = window.wp || {};

	function wpMediaElement() {
		var settings = {};

		/**
		 * Initialize media elements.
		 *
		 * Ensures media elements that have already been initialized won't be
		 * processed again.
		 *
		 * @since 4.4.0
		 *
		 * @returns {void}
		 */
		function initialize() {
			if ( typeof _wpmejsSettings !== 'undefined' ) {
				settings = $.extend( true, {}, _wpmejsSettings );
			}
			settings.classPrefix = 'mejs-';
			settings.success = settings.success || function ( mejs ) {
				var autoplay, loop;

				if ( mejs.rendererName && -1 !== mejs.rendererName.indexOf( 'flash' ) ) {
					autoplay = mejs.attributes.autoplay && 'false' !== mejs.attributes.autoplay;
					loop = mejs.attributes.loop && 'false' !== mejs.attributes.loop;

					if ( autoplay ) {
						mejs.addEventListener( 'canplay', function() {
							mejs.play();
						}, false );
					}

					if ( loop ) {
						mejs.addEventListener( 'ended', function() {
							mejs.play();
						}, false );
					}
				}
			};

			// Only initialize new media elements.
			$( '.wp-audio-shortcode, .wp-video-shortcode' )
				.not( '.mejs-container' )
				.filter(function () {
					return ! $( this ).parent().hasClass( 'mejs-mediaelement' );
				})
				.mediaelementplayer( settings );
		}

		return {
			initialize: initialize
		};
	}

	window.wp.mediaelement = new wpMediaElement();

	$( window.wp.mediaelement.initialize );

})( window, jQuery );