JSFiddle - React, Tailwind, and code Playground

HTML

<div class="cent"></div>

CSS

.cent
{
	height:50px;
	width:50px;
	background-color:black;
	margin:auto;
	position:absolute;
	left:50%;
	top:50%;
	margin-left:-25px;
	margin-top:-25px;
}