BackboneJS 模型清除
2018-01-05 11:35 更新
描述
它从骨干模型中删除所有属性,包括id属性。
语法model.clear(options)
model.clear(options)
参数
options:定义从模型中删除时使用的id,name等参数。
例<!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 Model = Backbone.Model.extend();
var model = new Model({name:"w3cschool", id:1});
document.write("<b>Before using clear, name: </b>", model.get('name'));
document.write("<b>Before using clear, id: </b>", model.get('id'));
document.write("<br>");
model.clear();
document.write("<b>After using clear, name:</b> ", model.get('name'));
document.write("<b>After using clear, id: </b>", model.get('id'));
</script>
</head>
<body></body>
</html>
<!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 Model = Backbone.Model.extend();
var model = new Model({name:"w3cschool", id:1});
document.write("<b>Before using clear, name: </b>", model.get('name'));
document.write("<b>Before using clear, id: </b>", model.get('id'));
document.write("<br>");
model.clear();
document.write("<b>After using clear, name:</b> ", model.get('name'));
document.write("<b>After using clear, id: </b>", model.get('id'));
</script>
</head>
<body></body>
</html>
输出
让我们执行以下步骤,看看上面的代码如何工作:- 将上面的代码保存在clear.htm文件中。
- 在浏览器中打开此HTML文件。
Before using clear, name: w3cschoolBefore using clear, id: undefined
After using clear, name: undefinedAfter using clear, id: undefined
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