JSFiddle - React, Tailwind, and code Playground

HTML

<div id="aa">
    <div id="bb">bb</div>
  </div>

CSS

#aa {background-color: #555; height: 200px; overflow: hidden; position: relative;}
 #bb {background-color: #ccc; position: absolute; top: 50px; left: 50px; bottom: 50px; right: 50px;}