function Person(name, age) {
    console.log(this); //Person{}
    this.name = name;
    this.age = age;
}

const p = new Person("Sun", 28);
console.log(p, p.name, p.age); //Person{} 'Sun' 28

const a = new Person("Sun2", 29);
console.log(a, a.name, a.age); //Person{} 'Sun2' 29

const Cat = (name, age) => {
    console.log(this); //Cat is not a constructior
    this.name = name;
    this.age = age;
};

const c = new Cat("고양이", 2); //Cat is not a constructior