JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css" />
    <script src="http://code.jquery.com/jquery-1.8.3.js"></script>
    <script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>
 
<p>Date1: <input type="text" id="datepicker1" /></p>
<p>Date2: <input type="text" id="datepicker2" /></p>

JavaScript

var $d1 = $("#datepicker1").datepicker();
var $d2 = $("#datepicker2").datepicker();
$d1.change(function() {
    $d2.datepicker("option", "defaultDate", $d1.val());
});