생성자 함수와 프로토타입의 constructor 프로퍼티

https://wikibook.co.kr/mjs/
P.271

function Person(name) {
  this.name = name;
}

const me = new Person('Lee');

console.log(me.__proto__ === Person.prototype);  // true

P.272

console.log(me.constructor === Person);  // true
console.log(me.__proto__.constructor === Person);  // true

상속

Person.prototype.sayHi = function () {
  console.log('Hi: ' + this.name);
}

const you = new Person('Lyu');

me.__proto__

you.__proto__.sayBye = function () {
  console.log('Bye: ' + this.name);
}

Person.prototype