JSFiddle - React, Tailwind, and code Playground

by luka kupunia

HTML

<div class="box">
  <div class="inner"></div>
</div>
<div>fwef</div>

CSS

div.box {
  width:50%;
  padding-top: 20%;
  background: red;
  position: relative;
}
div.box div.inner {
  width: 100%;
  height: 100%;
  position: absolute;
  background: blue;
  top: 0;
  left: 0;
}