JavaScript学习2：通过helloworld来认识下backbone

先来说一下这个helloworld的功能：
在页面上有一个报道的按钮，点击弹出输入框，输入内容，确认，最后内容会加到页面上。页面图如下：

backbone-helloworld

下面来看代码：

[html] <!DOCTYPE html>
<html>
<head>
    <title>the5fire.net-backbone.js-Hello World</title>
</head>
<body>
<button id="check">报到</button>
<ul id="world-list">

</ul>
<a href="http://www.the5fire.net">更多教程</a>
</body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script src="http://documentcloud.github.com/underscore/underscore-min.js"></script>
<script src="http://documentcloud.github.com/backbone/backbone-min.js"></script>
<script>
(function ($) {
    World = Backbone.Model.extend({
        //创建一个World的对象，拥有name属性
        name: null
    });

    Worlds = Backbone.Collection.extend({
        //World对象的集合
        initialize: function (models, options) {
            this.bind("add", options.view.addOneWorld);
        }
    });

    AppView = Backbone.View.extend({
        el: $("body"),
        initialize: function () {
            //构造函数，实例化一个World集合类，并且以字典方式传入AppView的对象
            this.worlds = new Worlds(null, { view : this })
        },
        events: {
            "click #check": "checkIn",   //事件绑定，绑定Dom中id为check的元素
        },
        checkIn: function () {
            var world_name = prompt("请问，您是哪星人?");
            if(world_name == "") world_name = '未知';
            var world = new World({ name: world_name });
            this.worlds.add(world);
        },
        addOneWorld: function(model) {
            $("#world-list").append("<li>这里是来自 <b>" + model.get('name') + "</b> 星球的问候：hello world！</li>");
        }
    });
    //实例化AppView
    var appview = new AppView;
})(jQuery);
</script>
</html>
<!DOCTYPE html>
<html>
<head>
    <title>the5fire.net-backbone.js-Hello World</title>
</head>
<body>
<button id="check">报到</button>
<ul id="world-list">

</ul>
<a href="http://www.the5fire.net">更多教程</a>
</body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script src="http://documentcloud.github.com/underscore/underscore-min.js"></script>
<script src="http://documentcloud.github.com/backbone/backbone-min.js"></script>
<script>
(function ($) {
    World = Backbone.Model.extend({
        //创建一个World的对象，拥有name属性
        name: null
    });

    Worlds = Backbone.Collection.extend({
        //World对象的集合
        initialize: function (models, options) {
            this.bind("add", options.view.addOneWorld);
        }
    });

    AppView = Backbone.View.extend({
        el: $("body"),
        initialize: function () {
            //构造函数，实例化一个World集合类，并且以字典方式传入AppView的对象
            this.worlds = new Worlds(null, { view : this })
        },
        events: {
            "click #check": "checkIn",   //事件绑定，绑定Dom中id为check的元素
        },
        checkIn: function () {
            var world_name = prompt("请问，您是哪星人?");
            if(world_name == "") world_name = '未知';
            var world = new World({ name: world_name });
            this.worlds.add(world);
        },
        addOneWorld: function(model) {
            $("#world-list").append("<li>这里是来自 <b>" + model.get('name') + "</b> 星球的问候：hello world！</li>");
        }
    });
    //实例化AppView
    var appview = new AppView;补充：web前端 , JavaScript ,