JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/dot-luv/jquery-ui.css">
<ul id="sortable"> 
    <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span><p></p></li> 
    <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span><p></p></li> 
    <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span><p></p></li> 
    <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span><p></p></li> 
    <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span><p></p></li>     
</ul> 
<span>index</span>

CSS

#sortable { list-style-type: none; margin: 0; padding: 0; width: 60%; }
#sortable li { margin: 0 3px 3px 3px; padding: 0.4em; padding-left: 1.5em; font-size: 1.4em; height: 18px; }
#sortable li span { position: absolute; margin-left: -1.3em; }

JavaScript

$('#sortable').sortable({
        stop: function(e, ui) {
            console.log($.map($(this).find('li'), function(el) {
                var index= $(el).index();
               	$(el).find("p").text(index);
            }));
        }
    });

$("#sortable").disableSelection();