JSFiddle - React, Tailwind, and code Playground

by Artem

HTML

<div id="one"></div>

CSS

#one {
  border: 1px solid #000;
  width: 200px;
  height: 200px;
}

JavaScript

'use strict';

one.onmouseenter = function() {
	this.style.backgroundColor = 'red';
};

one.onmouseleave = function() {
	this.style.backgroundColor = 'transparent';
};