es6的类和继承

class Animal{
    // 静态方法(静态方法只能通过类名调用，不可以使用实例对象调用)
    static showInfo(){
        console.log('hi');
    }
    // 构造函数
    constructor(name){
        this.name = name;
    }
    showName(){
        console.log(this.name);
    }
}
let a = new Animal('spike');
a.showName();
a.showInfo();
Animal.showInfo();

class Dog extends Animal{
    constructor(name,color){
        super(name);//super用来调用父类
        this.color = color;
    }
    showColor(){
        console.log(this.color);
    }
}
let d = new Dog('doudou','yellow');
d.showName();
d.showColor();
// d.showInfo();
Dog.showInfo();