Function replaceWith

lib/test/angular/1.4.3/angular.js:8567–8640

* This is a special jqLite.replaceWith, which can replace items which * have no parents, provided that the containing jqLite collection is provided. * * @param {JqLite=} $rootElement The root of the compile tree. Used so that we can replace nodes * i

($rootElement, elementsToRemove, newNode)

     * @param {Node} newNode The new DOM node.
     */
    function replaceWith($rootElement, elementsToRemove, newNode) {
      var firstElementToRemove = elementsToRemove[0],
          removeCount = elementsToRemove.length,
          parent = firstElementToRemove.parentNode,
          i, ii;

      if ($rootElement) {
        for (i = 0, ii = $rootElement.length; i < ii; i++) {
          if ($rootElement[i] == firstElementToRemove) {
            $rootElement[i++] = newNode;
            for (var j = i, j2 = j + removeCount - 1,
                     jj = $rootElement.length;
                 j < jj; j++, j2++) {
              if (j2 < jj) {
                $rootElement[j] = $rootElement[j2];
              } else {
                delete $rootElement[j];
              }
            }
            $rootElement.length -= removeCount - 1;

            // If the replaced element is also the jQuery .context then replace it
            // .context is a deprecated jQuery api, so we should set it only when jQuery set it
            // http://api.jquery.com/context/
            if ($rootElement.context === firstElementToRemove) {
              $rootElement.context = newNode;
            }
            break;
          }
        }
      }

      if (parent) {
        parent.replaceChild(newNode, firstElementToRemove);
      }

      // TODO(perf): what's this document fragment for? is it needed? can we at least reuse it?
      var fragment = document.createDocumentFragment();
      fragment.appendChild(firstElementToRemove);

      if (jqLite.hasData(firstElementToRemove)) {
        // Copy over user data (that includes Angular's $scope etc.). Don't copy private
        // data here because there's no public interface in jQuery to do that and copying over
        // event listeners (which is the main use of private data) wouldn't work anyway.
        jqLite(newNode).data(jqLite(firstElementToRemove).data());

        // Remove data of the replaced element. We cannot just call .remove()
        // on the element it since that would deallocate scope that is needed
        // for the new node. Instead, remove the data "manually".
        if (!jQuery) {
          delete jqLite.cache[firstElementToRemove[jqLite.expando]];
        } else {
          // jQuery 2.x doesn't expose the data storage. Use jQuery.cleanData to clean up after
          // the replaced element. The cleanData version monkey-patched by Angular would cause
          // the scope to be trashed and we do need the very same scope to work with the new
          // element. However, we cannot just cache the non-patched version and use it here as
          // that would break if another library patches the method after Angular does (one
          // example is jQuery UI). Instead, set a flag indicating scope destroying should be