JSFiddle - React, Tailwind, and code Playground

HTML

<div class="el"></div>

CSS

.el {
 	height: 100px;
	width: 100px;
	background: red;
	
	transform: rotate(0deg);
	transition: 0.3s;
 }
 
 .el:hover {
     transform: rotate(90deg);
	 transition: 0.3s;
 }