JSFiddle - React, Tailwind, and code Playground

by serio

HTML

<div id="hi">This is a test!?</div>

JavaScript

$(function() {
    var mydiv = $('#hi');
    var ohnoes = $('#i-not-here');

    if (mydiv.length) {
        alert('hooray!');
    }

    if (!ohnoes.length) {
        alert('boooo!');
    }
});