backbone.js集合扩展

本文概述

  • 参数说明
extend方法用于扩展主干的collection类以创建你自己的collection。它提供了实例属性和可选的classProperties,它们可以直接附加到集合的构造函数上。
句法:
Backbone.Collection.extend(properties, classProperties)

参数说明properties:属性为collection类提供实例属性。
classProperties:类属性附加到集合的构造函数上。
【backbone.js集合扩展】让我们举个例子。
请参阅以下示例:
< !DOCTYPE html> < head> < title>Extend Collection Example< /title> < script src="http://img.readke.com/220416/0405404200-0.jpg" type="text/javascript">< /script> < script src="http://img.readke.com/220416/04054030Q-1.jpg" type="text/javascript">< /script> < script src="http://img.readke.com/220416/0405403138-2.jpg" type="text/javascript">< /script> < /head> < body> < script type="text/javascript"> //The model 'MyTeam' includes default values andextended using the Backbone.Model class var MyTeam = Backbone.Model.extend({ defaults: { player: "Dhyanchand", country: "India" }, }); //'MyTeam1' is an instance of the collection var MyTeam1 = Backbone.Collection.extend({ model: MyTeam//model 'MyTeam' is specified for a collection by overriding the 'model' property }); //The collection 'MyTeam1' is instantiated by using new keyword var myval=new MyTeam1({}); //The JSON.stringify() method returns values of collection in the JSON format document.write("The values in the collection are: ", JSON.stringify(myval)); < /script> < /body> < /html>

输出:
将以上代码保存在extend.html文件中,然后在新的浏览器中打开此文件。
backbone.js集合扩展

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