knockout快速建立树形菜单

效果图，图比较简陋：

如何建立

引入knockout

<script type='text/javascript' src='http://www.see-source.com/js/knockout-2.2.0.js'></script>

Html代码

<ul  data-bind='template: { name: "guideTmpl", foreach: menus }'></ul>

Js代码

<!--菜单项模板-->
<script id="guideTmpl" type="text/html">
    <li >
		<span data-bind='text: name, click:$root.openOrClose'></span>
		<ul data-bind='template: { name: "guideTmpl", foreach: children }, visible:opened'></ul>
	</li>
</script>
<script type="text/javascript">
var Menu = function(name, children, opened) {
    this.name = ko.observable(name);
	this.children = ko.observableArray(children || []);	//下级子菜单
	this.opened = ko.observable(opened); //true:展开  false:折叠
};

var PeopleModel = function() {
    this.menus = ko.observableArray([
	    new Menu("Twitter BootStrap", [
		    new Menu("bootstrap介绍"),
			new Menu("响应式设计"),
			new Menu("JavaScript插件")
		]),
		new Menu("Knockout", [
		    new Menu("监控属性(Observables)"),
			new Menu("控制流绑定(Control flow)"),
			new Menu("表单域绑定(Form fields)"),
			new Menu("自定义绑定(Custom)")
		])
	]);
	//展开、折叠操做
	this.openOrClose = function(source){
	   var opened = source.opened();
	   if(opened)
	      source.opened(false);
	   else
	      source.opened(true);
	};
};

ko.applyBindings(new PeopleModel());
</script>

以上代码可直接粘贴运行

来自：http://www.see-source.com/front/front!index