In Backbone, Models may form the core of all data interaction, but you'll soon find that you need to work with multiple Models to do any real work, which is where the Collections class comes in. Just as a Model wraps an object and provides additional functionality, Collections wraps an array and offers several advantages over using the array directly:
Collectionsuses Backbone's class system, making it easy to define methods, create subclasses, and so onCollectionsallows other code to listen for and respond whenModelsare added or removed from thatCollectionor when Models in aCollectionare modifiedCollectionssimplifies and encapsulates the logic for communicating with the server
We can create a new Collection subclass, as follows:
var Cats = Backbone.Collection.extend({
// The properties and methods of Cats would go here
});Once we've created a subclass, we can instantiate new instances of it using JavaScript's new keyword, just as we did to create new...