JSFiddle - React, Tailwind, and code Playground

HTML

<body>
  <div class="wrapper">
  </div>
</body>

CSS

.wrapper {
  border-style: solid;
  border-width: 1px;
  border-color: red;
  width: 200px;
  height: 200px;
  background-color: silver;
  position: absolute;
  margin: auto;
  top: 0;left: 0;right: 0;bottom: 0;
}