code: function (node, javascriptEnabled) {
      // Recursively clone the node.
      var clone = node.nodeType === 3 ? document.createTextNode(node.nodeValue) : node.cloneNode(false);
      for (var child = node.firstChild; child; child = child.nextSibling) {
        if (javascriptEnabled === true || child.nodeType !== 1 || child.nodeName !== 'SCRIPT') {
          clone.appendChild(cloneNode(child, javascriptEnabled));
        }
      }
  
      if (node.nodeType === 1) {
        // Preserve contents/properties of special nodes.
        if (node.nodeName === 'CANVAS') {
          clone.width = node.width;
          clone.height = node.height;
          clone.getContext('2d').drawImage(node, 0, 0);
        } else if (node.nodeName === 'TEXTAREA' || node.nodeName === 'SELECT') {
          clone.value = node.value;
        }
  
        // Preserve the node's scroll position when it loads.
        clone.addEventListener('load', function () {
          clone.scrollTop = node.scrollTop;
          clone.scrollLeft = node.scrollLeft;
        }, true);
      }
  
      // Return the cloned node.
      return clone;
    }
docs: Deep-clone a node and preserve contents/properties.
  
  @private
  @ignore