[JavaScript] 만 19세 이상인지 확인하기

const birthdate = "19921202";

const today = new Date();
const yyyy = today.getFullYear();
const mm = today.getMonth() < 9 ? "0" + (today.getMonth() + 1) : (today.getMonth() + 1);
const dd  = today.getDate() < 10 ? "0" + today.getDate() : today.getDate();

console.log(parseInt(yyyy+mm+dd) - parseInt(birthdate) >= 190000);