JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//rawgit.com/dolox/fallback/v1.1.6/fallback.min.js"></script>
<body>
    <p>Check your network traffic...</p>
    <p id="msg"></p>
</body>

JavaScript

fallback.load({
	jQuery: '//ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js',
'//ajax.googleapis.com/ajax/libs/jquery/2.1.0/fail.js'
});
fallback.ready(['jQuery'], function() {
	$('#msg').html('if jquery.min.js is success... then fail.js dont should be call');
});