JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/themes/black-tie/jquery-ui.min.css">
<input type="text" class="date" placeholder="en-gb datepicker" />
<button id="btnGetVal">Get Value</button>

JavaScript

$(document).ready(function () {
    $('.date').datepicker({ dateFormat: "dd/mm/yy" });
    $('#btnGetVal').on('click', function() {
       /* event handler */
       var targetValue = $('.date').val();
       alert(targetValue);
    });
});