它檢查模型狀態下用validate()方法,並檢查驗證每個屬性。
model.isValid()
<!DOCTYPE html> <head> <title> Model 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> <script type="text/javascript"> var Person = Backbone.Model.extend({ defaults: { name: '', age: 25, }, validate: function(attributes) { if (attributes.name == '') { document.write("please enter the name!!!!"); } } }); var person = new Person({ name: 'John' }); document.write("The passed value for attribute 'name' is: ", person.isValid()); </script> </head> <body></body> </html>
讓我們進行以下步驟來看看上面的程式碼工作:
儲存上述程式碼在檔案isvalid.html
開啟瀏覽器這個HTML檔案。