JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.0/themes/base/jquery-ui.css">
<ul id="sortable1" class="connectedSortable">
    <li class="ui-state-default">Item 1</li>
    <li class="ui-state-default">Item 2</li>
    <li class="ui-state-default">Item 3</li>
    <li class="ui-state-default">Item 4</li>
    <li class="ui-state-default">Item 5</li>
</ul>

<ul id="sortable2" class="connectedSortable">
    <li class="ui-state-highlight">Item 1</li>
    <li class="ui-state-highlight">Item 2</li>
    <li class="ui-state-highlight">Item 3</li>
    <li class="ui-state-highlight">Item 4</li>
    <li class="ui-state-highlight">Item 5</li>
</ul>

<div id="status"></div>

CSS

#sortable1, #sortable2 { list-style-type: none; margin: 0; padding: 0; float: left; margin-right: 10px; }
#sortable1 li, #sortable2 li { margin: 0 5px 5px 5px; padding: 5px; font-size: 1.2em; width: 120px; }
#status { font-weight: bold }

JavaScript

$(function() {
    var isInside = true;

    $("#sortable1, #sortable2").sortable({
        connectWith: '.connectedSortable',
        stop: function() { 
            $("#status")
            .html( "Dropped " + (isInside ? "inside" : "outside"))
            .css("color", isInside ? "green" : "red") ;
        }
    })
    .droppable({
        over: function() { isInside = true; },
        out: function() { isInside = false; },
        accept: "li"
    });

});