（四）backbone - DEMO - 通信录

 1 var Contact = Backbone.Model.extend({
 2     defaults: {  
 3         name: ‘小强‘,  
 4         email: ‘walker@dead.com‘  
 5     },
 6     // validate user name
 7     validate: function(attrs,options) {
 8         if (attrs.name == "") {  
 9           return "what‘s the name?";  
10         };  
11     },
12     // for user search
13     filter: function(query) {
14         if (typeof(query) === ‘undefined‘ || query === null || query === ‘‘) return true;  
15         query = query.toLowerCase();  
16         return this.get(‘name‘).toLowerCase().indexOf(query) != -1 || this.get(‘email‘).toLowerCase().indexOf(query) != -1;  
17     }
18 });

1 var Contacts = Backbone.Collection.extend({
2     model: Contact,
3     localStorage: new Store(‘my-contacts‘)　　// 存至本地 　　
4 });