JS实现继承的几种方式

借用构造函数实现继承

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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）

借用原型链实现继承

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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

组合式继承　　

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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;