JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent">
  <div class="child">
  </div>
</div>

CSS

.parent {
  background-color: black;
  width: 200px;
  height: 200px;
  float: right;
}

.child {
  background-color: red;
  width: 100px;
  height: 100px;
}