JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  <ul>
    <li>Item1  <a class="moveUp">Move Up</a> <a class="moveDown">Move Down</a></li>
    <li>Item2  <a class="moveUp">Move Up</a> <a class="moveDown">Move Down</a></li>
    <li>Item3  <a class="moveUp">Move Up</a> <a class="moveDown">Move Down</a></li>
    <li>Item4  <a class="moveUp">Move Up</a> <a class="moveDown">Move Down</a></li>
    <li>Item5  <a class="moveUp">Move Up</a> <a class="moveDown">Move Down</a></li>
  </ul>
</div>

JavaScript

$(".moveUp").click(function () {
    var thisLine = $(this).parent();
    var prevLine = thisLine.prev();
    prevLine.before(thisLine);
});