JSFiddle - React, Tailwind, and code Playground

HTML

<div id="hide-this"></div>
    <div id="show-this"></div>

CSS

#hide-this {
      width: 100px;
      height: 100px;
      background-color: red;
    }

    #show-this {
      width: 100px;
      height: 100px;
      background-color: green;
    }

JavaScript

$(document).ready(function() {
    var windowURL = window.location.href;

    if (windowURL.indexOf('jsfiddle') > -1) {
    	$('#hide-this').css('display', 'none');
    }
});