イベントを処理するコールバックメソッドを使用して、指定されたDOM要素に要素をバインドします。 ビューからイベントが削除された場合、このメソッドを使用してイベントをビューに添付できます。
delegateEvents(events)イベント-ビューに再アタッチするために必要なイベントを提供します。
<!DOCTYPE html>
<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 'delegateFunc'
events: {
'click button': 'delegateFunc'
},
delegateFunc: function () {
this.remove(); //The 'remove()' method removes the view from the DOM
document.write("Welcome to finddevguides...");
},
//'render' provides the logic required to construct the view
render: function () {
//'$el' is cached object that push the content defined within it and
//display the value when user clicks the button
this.$ell('<button>Click to delegate events</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'}); //'el' defines which element to be used as the view reference
//Here defining the events which are reattaching to the view
//using 'delegateEvents()' method
myview.delegateEvents();
</script>
</body>
</html>上記のコードがどのように機能するかを確認するために、次の手順を実行してみましょう-
