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polyfills.js (1127B)

      1 /**
      2  * File polyfills.js.
      3  *
      4  * Polyfills for IE11.
      5  */
      6 
      7 /**
      8  * Polyfill for Element.closest() because we need to support IE11.
      9  *
     10  * @since Twenty Twenty-One 1.0
     11  *
     12  * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/closest
     13  */
     14 if ( ! Element.prototype.matches ) {
     15 	Element.prototype.matches = Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector;
     16 }
     17 
     18 if ( ! Element.prototype.closest ) {
     19 	Element.prototype.closest = function( s ) {
     20 		var el = this;
     21 		do {
     22 			if ( Element.prototype.matches.call( el, s ) ) {
     23 				return el;
     24 			}
     25 			el = el.parentElement || el.parentNode;
     26 		} while ( el !== null && el.nodeType === 1 );
     27 		return null;
     28 	};
     29 }
     30 
     31 /**
     32  * Polyfill for NodeList.foreach() because we need to support IE11.
     33  *
     34  * @since Twenty Twenty-One 1.0
     35  *
     36  * @see https://developer.mozilla.org/en-US/docs/Web/API/NodeList/forEach
     37  */
     38 if ( window.NodeList && ! NodeList.prototype.forEach ) {
     39 	NodeList.prototype.forEach = function( callback, thisArg ) {
     40 		var i;
     41 		thisArg = thisArg || window;
     42 		for ( i = 0; i < this.length; i++ ) {
     43 			callback.call( thisArg, this[i], i, this );
     44 		}
     45 	};
     46 }