JSFiddle - React, Tailwind, and code Playground

HTML

<div class='radius'></div> 
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript" src="http://malsup.github.com/jquery.corner.js"></script>

CSS

.radius{position:absolute;width:200px;height:200px;background:#eaeaea;}

JavaScript

$('.radius').corner();