JS面向对象-原型链的认知

直接上代码

//第一种将父级实例化对象直接赋给子集的原型链 实现继承function Parent(array){this.array = array;this.color = "red";this.size = {width:'300px',height:"300px"};}function Child1(){ this.border = '1px solid ' + this.color;}//子集可以继承父级的属性和方法Child1.prototype = new Parent();var child1 = new Child1();console.log(child1.border);//1px solid red// 第二种通过call  或者 apply实现继承function Child2(){Parent.apply(this,[{'name':'zhangsan'}]); this.border = '1px solid ' + this.color; console.log(this.array);//{'name':'zhangsan'}}var child2 = new Child2();console.log(child2.border);//1px solid redconsole.log(Parent.prototype.isPrototypeOf(child1));//trueconsole.log(child2.hasOwnProperty('size'));//trueconsole.log(child1 instanceof Child1);//true