javascript - super Backbone

Question

当我覆盖 Backbone.Model 的 clone() 方法时，有没有办法从我的植入中调用这个覆盖的方法？像这样:

var MyModel = Backbone.Model.extend({
    clone: function(){
        super.clone();//calling the original clone method
    }
})

Answer 1

你会想要使用:

Backbone.Model.prototype.clone.call(this);

这将使用 this(当前模型)的上下文从 Backbone.Model 调用原始的 clone() 方法。

来自 Backbone docs :

Brief aside on super: JavaScript does not provide a simple way to call super — the function of the same name defined higher on the prototype chain. If you override a core function like set, or save, and you want to invoke the parent object's implementation, you'll have to explicitly call it.

var Note = Backbone.Model.extend({
 set: function(attributes, options) {
 Backbone.Model.prototype.set.apply(this, arguments);
 ...
 }    
});