Absolute countdown

Use timer.now for server deadlines, auctions, reservations, job expiries, and other wall-clock timestamps.

Absolute deadline

00:30

idle

Deadline6:52:33 PM

Remaining30s

Wall-clock sourcetimer.now

const timer = useTimer({
  autoStart: true,
  endWhen: snapshot => snapshot.now >= expiresAt,
});

const remainingMs = Math.max(0, expiresAt - timer.now);