weakMap/createDocumentFragment.html at master · qiudaoermu/weakMap · GitHub

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<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title></title>
  </head>
  <body>
    <div class="append-c">
      <div class="append-child"></div>
    </div>
    <ul id="ul">
      <li>1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
    </ul>
  </body>
  <script type="text/javascript">
    var element = document.getElementById('ul'); // assuming ul exists
    var fragment = document.createDocumentFragment();
    var browsers = ['Firefox', 'Chrome', 'Opera', 'Safari', 'Internet Explorer'];
    // browsers.forEach(function (browser) {   var li = document.createElement('li');   li.textContent = browser;   fragment.appendChild(li); }); element.appendChild(fragment);
    var child
    var appendC = element.firstChild
    debugger
    while (child = element.firstChild) {
      debugger
      console.log(element.children)
      fragment.append(child)
      console.log(fragment)
    }
  </script>
</html>