原型链继承

和原型继承有什么不同呢？
分别的用处是什么呢？
需要仔细体会

function Parent() {
    this.name = 'mike';
}

function Child() {
    this.age = 12;
}

Child.prototype = new Parent();
let child1 = new Child();

console.log(child1.age);
console.log(child1.name);

function Brother() {
    this.weight = 60;
}

Brother.prototype = new Child();
let brother1 = new Brother();

console.log(brother1.weight);
console.log(brother1.age);
console.log(brother1.name);

来源：https://blog.csdn.net/Andrew_Lii/article/details/98874066