JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li>A</li>
  <li>B</li>
  <li>C</li>
</ul>
<ul>
  <li>A</li>
  <li>B</li>
  <li>C</li>
</ul>

JavaScript

$('ul').each(function(){
    var ul = $(this);
    ul.children().each(function(i, li){
        ul.prepend(li)
    });
});