BackboneJS 模型刪除屬性
2018-01-05 11:29 更新
描述
它用于從骨干模型中刪除屬性。
語法model.unset(attribute)
model.unset(attribute)
參數(shù)
attribute：屬性定義創(chuàng)建的模型的屬性。
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 Company = Backbone.Model.extend();
var company=new Company();
company.set({ comp_name: "w3cschool"});
document.write("<b>Before using unset method , Company name is:</b> ", company.get('comp_name'));
company.unset('comp_name');
document.write("<br>");
document.write("<b>After unset, Company name is:</b>", company.get('comp_name'));
</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 Company = Backbone.Model.extend();
var company=new Company();
company.set({ comp_name: "w3cschool"});
document.write("<b>Before using unset method , Company name is:</b> ", company.get('comp_name'));
company.unset('comp_name');
document.write("<br>");
document.write("<b>After unset, Company name is:</b>", company.get('comp_name'));
</script>
</head>
<body></body>
</html>
輸出
讓我們執(zhí)行以下步驟，看看上面的代碼如何工作：- 將上面的代碼保存在unset.htm文件中。
- 在瀏覽器中打開此HTML文件。
Before using unset method , Company name is: w3cschool
After unset, Company name is: undefined
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