22-05-30 | Promise(🐓 ⇒ 🥚 ⇒ 🍳)

// https://www.youtube.com/watch?v=JB_yU6Oe2eE 19:30에 설명 나옴

const getHen = () => new Promise(
	(resolve, reject) => {
    setTimeout(() => resolve('🐓'), 1000);
  }
);

const getEgg = hen => new Promise(
	(resolve, reject) => {
    setTimeout(() => resolve(`${hen} => 🥚`), 1000);
  }
);

const cook = egg => new Promise(
	(resolve, reject) => {
    setTimeout(() => resolve(`${egg} => 🍳`), 1000);
  }
);

getHen()
	.then(hen => getEgg(hen))
	.then(egg => cook(egg))
	.then(meal => console.log(meal));