JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://unpkg.com/underscore"></script>
<script src="https://unpkg.com/backbone"></script>
<div id="custom-view"/>

JavaScript

var CustomView = Backbone.View.extend({
	template: '<div>Hello World!</div>',
	render: function() {
		this.$el.html(this.template);
    	return this;
	}
});
var instance = new CustomView({
	el: '#custom-view'
}).render();