API-Explorer-II/src/assets/inactivity-timer.js

function addSeconds(date, seconds) {
  date.setSeconds(date.getSeconds() + seconds);
  return date;
}

export function showCountdownTimer() {

  // Get current date and time
  var now = new Date().getTime();
  let distance = countDownDate - now;

  // Output the result in an element with id="countdown-timer-span"
  let elementId = ("countdown-timer-span");
  document.getElementById(elementId).innerHTML = "in " + Math.floor(distance / 1000) + "s";

  // If the count down is over release resources
  if (distance < 0) {
    destroyCountdownTimer();
  }
}


// Set the date we're counting down to
let countDownDate = addSeconds(new Date(), 5);

let showTimerInterval = null;

export function destroyCountdownTimer() {
    clearInterval(showTimerInterval);
}

export function resetCountdownTimer(seconds) {
    destroyCountdownTimer(); // Destroy previous timer if any
    countDownDate = addSeconds(new Date(), seconds); // Set the date we're counting down to
    showTimerInterval = setInterval(showCountdownTimer, 1000); // Update the count down every 1 second
}