Function beat

e2e/src/timeline.ts:83–86

(ms: number = FILM_BEAT_MS)

/** Hold for the viewer — a no-op unless this run is being filmed. */
export const beat = async (ms: number = FILM_BEAT_MS): Promise<void> => {
  if (!isFilming()) return;
  await new Promise((tick) => setTimeout(tick, ms));
};

/**
 * Focus `window`, lingering a beat on the OUTGOING window first when this is a