es6面向对象

<script>
    class user{
        constructor(name,age){
            this.name=name;
            this.age=age;
        }
        showName(){
            alert(this.name)
        }
        showAge(){
            alert(this.age)
        }
    }
    var zhangsan=new user('aaaa',18);
    zhangsan.showName()
    zhangsan.showAge()
</script>