Backbone's only hard dependency is Underscore.js ( >= 1.8.3). For RESTful persistence and DOM manipulation with Backbone.View, include jQuery ( >= 1.11.0). (Mimics of the Underscore and jQuery APIs, such as Lodash and Zepto, will also tend to work, with varying degrees of compatibility.) Getting Started When working on a web application that involves a lot of JavaScript, one of the first things yo