JSFiddle - React, Tailwind, and code Playground

HTML

<div>Test me!</div>

CSS

div {
    background-color:#333;
    padding:4em;
    transition:background-color 0.5s ease;
}

div.color {
    background-color:#f2f2f2;
}

JavaScript

$('div').click(function() {
  $(this).toggleClass('color');
});