如果jQuery包含在頁面上,在每個檢視具有執行檢視的元素中範圍裡查詢一個$函式。如果使用該範圍內的jQuery函式,不必使用模型ID作為查詢拉出的具體內容在列表的一部分,並且可以依靠更多的HTML類屬性。這等同於執行: view.$el.find(selector)
view.$(selector)
<!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="myVal"> <button id="button" data-test="">Click Here</button> </div> <span id="myLog"></span> <script type="text/javascript"> //The variable contains id selector as 'mydata' var myLog = $('#mydata'); //The variable 'data' is used to display the values var data = function(val) { document.write(val); }; //'ViewDemo' is a name of the view class var ViewDemo = Backbone.View.extend({ //When click event occurs it activates the defined functions 'myFunc1' and 'myFunc2' events: { 'click [data-test]' : 'myFunc1', 'click *[data-test]': 'myFunc2', }, //'el' uses '#myVal' as the view reference el: $('#myVal'), //When user clicks the button, it refers to the button defined within the 'div' tag and //it will display the below statements myFunc1: function () { data('Hello...'); }, myFunc2: function () { data('Welcome to tw511.com...'); } }); //'myview' is an instance of the 'ViewDemo' class var myview = new ViewDemo(); </script> </body> </html>
讓我們進行以下步驟來看看上面的程式碼工作:
儲存上述程式碼到dollar-jquery.html檔案
在瀏覽器開啟這個HTML檔案。