关于javascript:class继承

<!--js文件-->
<!--class继承类-->
class People{
    constructor(name,age){
        this.name = name;
        this.age = age;
    },
    sayHide(){
        console.log(
        `姓名：${this.name},年龄 ${this.age}`
        )
    }
}

<!--通过类 new 一个实例/对象-->
const xiaoming = new People('xiaoming','19');
xiaoming.sayHide();

class Student extends People{
    constructor(name,number){
        super(name);
        this.number = number;
    },
}
const wang = new People('wang',1);