isNew
优质
小牛编辑
136浏览
2023-12-01
描述 (Description)
如果模型未保存到服务器并且还没有id,则认为它是新的。 此方法有助于确定此状态。
语法 (Syntax)
model.isNew()
例子 (Example)
<!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: {
title: 'xnip'
}
});
var person = new Person();
document.write(person.isNew());
</script>
</head>
<body></body>
</html>