JSFiddle - React, Tailwind, and code Playground

HTML

<div id="resizable">
        <div id="title">
            <h2>
            The expanding box
            </h2>
        </div>    
    </div>

CSS

#resizable { width: 200px; height: 150px; padding: 5px; border: 1px solid red;}

JavaScript

$('#resizable').width());