JSFiddle - React, Tailwind, and code Playground

by Blender

HTML

<div id="container">
        
    </div>

CSS

html, body{
    height: 100%;
}
#container{
    width: 100px;
    height: 200px;
    background: rgba(0, 0, 255, .25);
}
#container div{
    border: solid 1px red;
}

JavaScript

$('<div>', {'class': 'inner'}).appendTo('#container').animate({ height: '25%'});