undelegateEvents
优质
小牛编辑
131浏览
2023-12-01
描述 (Description)
它用于从DOM中删除视图的委托事件。
语法 (Syntax)
delegateEvents()
例子 (Example)
<!DOCTYPE html>
<head>
<title>View Example</title>
<script src = "https://code.jquery.com/jquery-2.1.3.min.js"
type = "text/javascript"></script>
<script src = "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js"
type = "text/javascript"></script>
<script src = "https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js"
type = "text/javascript"></script>
</head>
<body>
<div id = "mydiv"></div>
<script type = "text/javascript">
//'ViewDemo' is a name of the view class
var ViewDemo = Backbone.View.extend({
//When click event occurs it activates the defined function 'undelegateFunc'
events: {'click button': 'undelegateFunc'}, undelegateFunc: function () {
document.write("do something...");
$(this.el).undelegate('button', 'click');
},
//'render' provides the logic required to construct the view
render: function () {
//'$el' is cached object that push the content defined within it and
//display the value when user clicks the button
this.$el.html('<button>Click to undelegate</button>');
},
//This function is called when the view is instantiated
initialize:function(){this.render();}
});
//'myview' is an instance of the 'ViewDemo' class
var myview = new ViewDemo({el: '#mydiv'});
</script>
</body>
</html>