S023手写一个寄生组合继承

function Parent(name) {
  this.name = name;
  this.say = () => {
    console.log(111);
  };
}
Parent.prototype.play = () => {
  console.log(222);
};
function Children(name,age) {
  Parent.call(this,name);
  this.age = age;
}
Children.prototype = Object.create(Parent.prototype);
Children.prototype.constructor = Children;
// let child = new Children("yyy",18);
// // console.log(child.name);
// // console.log(child.age);
// // child.say();
// // child.play();

class Parent {
  constructor(name) {
    this.name = name
  }
  eat() {
    console.log(this.name + ' is eating')
  }
}

class Child extends Parent {
  constructor(name, age) {
    super(name)
    this.age = age
  }
}

// 测试
let xm = new Child('xiaoming', 12)
console.log(xm.name) // xiaoming
console.log(xm.age) // 12
xm.eat() // xiaoming is eating