function Parent(name) { this.name = name; } Parent.prototype.work = function () { console.log(this.name + " is working"); }; function Child(name, anotherName) { Parent.call(this, name); // 执行函数Parent(name) this.anotherName = anotherName; } Child.prototype = Object.create(Parent.prototype); // Object.create(Parent.prototype)的作用是:创建一个空对象,空对象的__proto__等于Parent.prototype Child.prototype.play = function () { console.log(this.anotherName + " is playing"); }; var child = new Child("Googler", "Googlex"); child.work(); child.play();
原型图
原型图.png
作者:Googler
链接:https://www.jianshu.com/p/657a761b06b5