Underscore - a widely adopted functional programming utility library, providing functional primitives such as map, reduce, each and filter. Lo-Dash is a replacement for Underscore that boasts performance increases, bug fixes and additional features. Underscore can be used in conjunction with Angular.
Backbone - a tried and true bare bones MVC framework that provides fundamental features such as events, observable properties, and class-like inheritance. Backbone also has foundational support for routing based on hash fragments and RESTful synchronization with a CRUD backend for persistence. Backbone was one of the first on the JavaScript MVC library scene, and surely influenced Angular.
这些例子非常简单 :)