以下简单代码会引发错误:
“未捕获的 TypeError:无法使用 'in' 运算符在 Leo 中搜索 'id'”在主干-min.js:9
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script src="http://ajax.cdnjs.com/ajax/libs/underscore.js/1.1.4/underscore-min.js"></script>
<script src="http://ajax.cdnjs.com/ajax/libs/backbone.js/0.3.3/backbone-min.js"></script>
<script>
var User = Backbone.Model.extend({
initialize: function(n) {
this.name = n;
}
});
var user = new User("Leo");
</script>
</body>
</html>
如何使此代码与 Backbone.js 一起使用?