javascript - 如何扩展继承Backbone.Events的类？

Question

我正在尝试使用 Backbone.js 继承模型创建以下类结构:

Backbone.Events -> Parent -> Child

子级应该从父级调用initialize，但不幸的是它不起作用。父方法和属性不可见。请帮忙。

我的代码

var Parent = function() {
    this.initialize.apply(this, arguments);
};

_.extend(Parent.prototype, Backbone.Events, {

    initialize: function() {
        // parent init
    },
});

var Child = function() {
    this.initialize.apply(this, arguments);
};

_.extend(Child.prototype, Parent, {
    /* Inherits Parent */

    initialize: function() {
        // need to call `parent init` code
        // need to init myself (child)
        // DOES NOT WORK
        // Parent methods and properties are not visible
        Parent.prototype.initialize.call(this, arguments);
    }
});

Answer 1

只需使用以下方法:

function Parent() {
    this.initialize.apply(this, arguments);
};

_.extend(Parent.prototype, Backbone.Events, {

    initialize: function() {
        // parent init
    },
});

// pick extend method from Backbone
Parent.extend = Backbone.Model.extend;

var Child = Parent.extend({
    initialize: function() {
        // Parent methods and properties are visible
        Parent.prototype.initialize.apply(this, arguments);
    }
});