1、借用构造函数实现继承
function Parent1(){ this.name = "parent1" } function Child1(){ Parent1.call(this); this.type = "child1"; }
缺点：Child1无法继承Parent1的原型对象，并没有真正的实现继承（部分继承）
2、借用原型链实现继承
function Parent2(){ this.name = "parent2"; this.play = [1,2,3]; } function Child2(){ this.type = "child2"; } Child2.prototype = new Parent2();
缺点：原型对象的属性是共享的
3、组合式继承
function Parent3(){ this.name = "parent3"; this.play = [1,2,3]; } function Child3(){ Parent3.call(this); this.type = "child3"; } Child3.prototype = Object.create(Parent3.prototype); Child3.prototype.constructor = Child3
原文：https://www.cnblogs.com/dgqboke/p/9661388.html