JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.11.0/themes/smoothness/jquery-ui.css">
<script src="http://code.jquery.com/ui/1.11.0/jquery-ui.js"></script>
 <body>
     Date: <input type="text" id="datepicker">
 </body>

JavaScript

$(function() {
    $( "#datepicker" ).datepicker({
        onSelect: function(dateText, inst) {
            alert('called!');
        }
    });
});