JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li class="fail">dsadafoo</li>
  <li class="success">bar</li>
</ul>

CSS

.fail {color:red;}
.success {color:green;}

JavaScript

Main = {
        start: function () {
            console.log(typeof($));                    
        },
        init: function () {
            if (typeof(jQuery) == 'undefined') {  
                var script = document.createElement('script');
                script.type = 'text/javascript';
                script.src = 'http://code.jquery.com/jquery.min.js';
                script.onload= Main.start;
                document.getElementsByTagName('body')[0].appendChild(script);
                console.log("BLAA");
            }
       },
    };
    Main.init();