JSFiddle - React, Tailwind, and code Playground

by Bob Jones

HTML

<div class="fullwidth">
  <div class="greensquare">
  
  </div>
</div>

CSS

.greensquare {
  background-color: green;
  width: 100px;
  height: 100px;
}

body {
  margin: 0;
}

.fullwidth {
  width: 100%;
  height: 100%;
  position: absolute;
  display: flex;
  justify-content: center;
  align-items: center;
}