JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/js-signals/1.0.0/js-signals.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/crossroads/0.12.2/crossroads.min.js"></script>
<a href="#foo">Testing link</a>

JavaScript

var route1 = crossroads.addRoute('/foo', function(){
    console.log("Hello");
});