JSFiddle - React, Tailwind, and code Playground

HTML

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

CSS

*{margin:0; padding:0;}
.wrapper{
  width: 300px;
  height: 300px;
  border: 1px solid black;
  display: flex;
  justify-content: center;
  align-items: center;
}