JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="sortable">
    <li class="ui-state-default">1</li>
    <li class="ui-state-default">2</li>
    <li class="ui-state-default">3</li>
    <li class="ui-state-default">4</li>
    <li class="ui-state-default">5</li>
    <li class="ui-state-default">6</li>
    <li class="ui-state-default">7</li>
    <li class="ui-state-default">8</li>
    <li class="ui-state-default">9</li>
    <li class="ui-state-default">10</li>
    <li class="ui-state-default">11</li>
    <li class="ui-state-default">12</li>
</ul>

CSS

#sortable { list-style-type: none; margin: 0; padding: 0; }
#sortable li { margin: 3px 3px 3px 0; padding: 1px; float: left; width: 100px; height: 90px; font-size: 4em; text-align: center; border: solid 1px #333; background-color: pink; }

JavaScript

$( "#sortable" ).sortable({opacity: 0.5, stop: function(event, ui) { alert("stop");}});                           
//$( "#sortable" ).disableSelection();