JSFiddle - React, Tailwind, and code Playground

HTML

<h1 id="0">0</h1>
<h1 id="1">1</h1>
<h1 id="2">2</h1>
<h1 id="3">3</h1>

JavaScript

var q = $('h1');
q.fadeIn().fadeOut().fadeIn().fadeOut();
setTimeout(function() { $('#2').finish(); }, 500);