JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//ajax.googleapis.com/ajax/libs/jquerymobile/1.4.2/jquery.mobile.min.js"></script>
<link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/jquerymobile/1.4.2/jquery.mobile.min.css">
<div data-role="page">			
    <div data-role="panel" id="mypanel" data-theme="a" class="ui-response" style="width: 100%;">
        <p>This is my content</p>
    </div>
   <div data-role="content">
     <a href="#mypanel" data-role="button" data-display="overlay" data-position="left" data-dismissible="true">Panel open/close</a>
   </div>
</div>

JavaScript

$(document).ready(function(){
	$("#mypanel").panel("open");
})