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   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  }