JSFiddle - React, Tailwind, and code Playground

by Alex Coleman

HTML

<div class="father">
  <div class="son">box1</div>
</div>

CSS

div.father {
  border: 1px solid black;
  align-items: center;
  justify-content: center;
  display: flex;
  height: 300px;
  width: 300px;
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
}

div.son {
  border: 1px solid black;
  height: 100px;
  width: 100px;
  align-items: center;
  justify-content: center;
  display: flex;
}