JS的继承

1. 原型继承原理：把父类的实例作为子类的原型。缺点：子类的实例共享了父类构造函数的引用属性，不能传参。var person = { friends: ["a", "b", "c", "d"];} var p1 = Object.create(person);p1.friends.push("aaa"); console.log(p1.__proto__ == person);//trueconsole.log(p1);// {}console.log(person);//{