defaults

优质

小牛编辑

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2023-12-01

描述 (Description)

它为模型设置默认值，这意味着如果用户未指定任何数据，则模型不会使用空属性。

语法 (Syntax)

model.defaults

例子 (Example)

<!DOCTYPE html>
<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 : {
               "title": "Hello",
               "description": "Welcome to xnip"
            }
         });
         var person = new Person();
         document.write(person.get('description'));
      </script>
   </head>
   <body></body>
</html>