JSFiddle - React, Tailwind, and code Playground

by Pointy

HTML

<div id='x'>Hello There</div>

<button id='a'>A</button>
<button id='b'>B</button>

<div id='y'></div>

JavaScript

$('a').addEvent('click', function() {
    $('x').addClass("x['y','z']");
    $('y').innerHTML = (document.getElementById('x').className);
});

$('b').addEvent('click', function() {
    $('x').removeClass("x\\['y','z'\\]");
    $('y').innerHTML = (document.getElementById('x').className);
});