【写给自己看的】JavaScript中使用class例子

class Rectangle{
  constructor(height,width){
    this.height=height;
    this.width=width;
    this.area=this.height * this.width
  }
  get getAreaInGet(){
    return '面积为'+this.height * this.width+'--get得出'
  }

  getArea(){
    return '面积为'+this.height * this.width+'--getArea方法得出，非get得出'
  }


}

// extends 创建子类

class Animal{
  constructor(name){
    this.name=name
  }
  speak(){
    console.log(this.name+'动物发出叫声')
  }
}

class Dog extends Animal{
  speak(){
    console.log(this.name+'狗叫')
  }
}

// 使用super 调用超类

class Cat{
  constructor(name){
    this.name=name
  }
  speak(){
    console.log(this.name+'猫科类动物发出的叫声')
  }
}

class Lion extends Cat{
  speak(){
    super.speak() // 调用父对象上的函数
    console.log(this.name+'狮子的叫声')
  }
}

class Monkey{
  constructor(age,sex){
    this.age='Monkey里的age'+age;
    this.sex='Monkey里的sex'+sex;
    this.name='猿猴'
  }
}

class People extends Monkey{
  constructor(age,sex){
    super(age,sex)
    this.name='人类'
  }
}

参考
1、https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Classes

2、https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Statements/class
3、http://es6.ruanyifeng.com/#docs/class