Javascript原型最佳实践

Question

我正在尝试从SubClass到MainClass执行一个方法。 它适用于此代码，但有最好的方法（不使用参数中的“_parent”）吗？
非常感谢你的帮助！

==> https://jsfiddle.net/jdrwwmt5/

 var APP; (function () { "use strict"; APP = function (id) { this.name = "MainClass" this.id = id; this.init(); }; APP.prototype = { init: function () { this.subClass = new APP.Sub(this); }, onSubClassReady: function (_origin) { console.log(this); console.log(this.name); console.log(_origin); console.log(_origin.name); }, }; }()); (function () { "use strict"; var Sub = APP.Sub = function (_parent) { this.name = "SubClass" this.parent = _parent; this.isReady = false; this.initialize(); }; Sub.prototype = { initialize: function () { //... this.ready(); }, ready:function (){ this.isReady = true; this.parent.onSubClassReady(this); }, } }()); var app1 = new APP('1');