javascript reverse sorting method_javascript skills

<ul id="ul1"> <li>1</li> <li>2</li> <li>3</li> <li>4</li> </ul>
[Ctrl A select all Note: If you need to introduce external Js, you need to refresh to execute

]<script> var ul = document.getElementById('ul1'); var lis = ul.getElementsByTagName('li'); var i = lis.length; while (i--) ul.appendChild(lis[i]); </script>