const timeElement = document.querySelector("#local-time");

function updateClock() {
  const now = new Date();
  timeElement.textContent = new Intl.DateTimeFormat("en-US", {
    timeZone: "America/Detroit",
    hour: "2-digit",
    minute: "2-digit",
    second: "2-digit",
    hour12: false,
  }).format(now);
}

updateClock();
window.setInterval(updateClock, 1000);