setTimeout(), setInterval(), and requestAnimationFrame()

let count = 0;
const intervalId = setInterval(() => {
  count++;
  if (count > 5) clearInterval(intervalId);
}, 1000);

It's required for the interval to work
It allows stopping the interval later
Storing the interval ID is important because: 1) It's the only way to stop the interval later, 2) Enables conditional interval clearing, 3) Necessary for cleanup in component lifecycles, 4) Prevents infinite execution when needed, 5) Allows external control of the interval, 6) Essential for proper resource management.
It improves performance
It prevents memory leaks automatically