spread 연산자

spread 연산자 : 끌어오기! (중복해결, 연결)

const cookie = {
  base: "cookie",
  madeIn: "korea"   
};

const chocochipCookie = {
  ...cookie,  // cookie 객체 끌어다옴
  toping: "chocochip"
};

const blueberryCookie = {
  ...cookie,
  toping: "blueberry"
};

const strawberryCookie = {
  ...cookie,
  toping: "strawberry"
};

console.log(chocochipCookie); // {base: "cookie", madeIn: "korea", toping : "chocochip"}




const actor = ["박보영", "김태희", "전지현"];
const singer = ["아이유", "청하", "박효신"];

const star = [...actor, ...singer];
console.log(star); // ["박보영", "김태희", "전지현", "아이유", "청하", "박효신"]