자바스크립트 현재 시간 타이머 만들기 (00:00:00, 앞에 0붙이기)

const h1 = document.createElement("h1");
document.querySelector("body").prepend(h1);

const getTime = () => {
  const now = new Date();
  let hours = now.getHours();
  let minutes = now.getMinutes();
  let seconds = now.getSeconds();
  hours = hours < 10 ? `0${hours}` : hours;
  minutes = minutes < 10 ? `0${minutes}` : minutes;
  seconds = seconds < 10 ? `0${seconds}` : seconds;
  h1.innerText = `${hours}:${minutes}:${seconds}`;
};

getTime();
setInterval(getTime, 1000);