Convert seconds to days, hours, minutes and seconds

Question

I have a Javascript timing event with an infinite loop with a stop button.

It will display numbers when start button is click.Now I want this numbers converted to so

Answer 1

function countdown(s) {

  const d = Math.floor(s / (3600 * 24));

  s  -= d * 3600 * 24;

  const h = Math.floor(s / 3600);

  s  -= h * 3600;

  const m = Math.floor(s / 60);

  s  -= m * 60;

  const tmp = [];

  (d) && tmp.push(d + 'd');

  (d || h) && tmp.push(h + 'h');

  (d || h || m) && tmp.push(m + 'm');

  tmp.push(s + 's');

  return tmp.join(' ');
}

// countdown(3546544) -> 41d 1h 9m 4s
// countdown(436654) -> 5d 1h 17m 34s
// countdown(3601) -> 1h 0m 1s
// countdown(121) -> 2m 1s