A relatively accurate setInterval

interval-timer.js

function intervalTimer(callback, interval = 500) {
  let counter = 1;
  let timeoutId;
  const startTime = Date.now();

  function main() {
    const nowTime = Date.now();
    const nextTime = startTime + counter * interval;
    timeoutId = setTimeout(main, interval - (nowTime - nextTime));

    console.log('deviation', nowTime - nextTime);

    counter += 1;
    callback();
  }

  timeoutId = setTimeout(main, interval);

  return () => {
    clearTimeout(timeoutId);
  };
}

let value = 10;

const cancelTimer = intervalTimer(() => {
  if (value > 0) {
    value -= 1;
  } else {
    cancelTimer();
  }
}, 1000);

// deviation 3
// deviation 1
// deviation 0
// deviation 2