import { createSignal, onCleanup } from "solid-js";

/**
 * Shared animation clock — a signal that ticks at a fixed interval.
 *
 * Components that need time-derived values (spinner frame, shimmer position,
 * stalled detection) should share a single clock rather than each running
 * their own setInterval. This mirrors CC's single useAnimationFrame(50)
 * and means animation automatically stops producing signal updates when
 * the component is disposed.
 */
export function useClock(intervalMs = 50) {
  const [time, setTime] = createSignal(0);
  const id = setInterval(() => setTime(t => t + intervalMs), intervalMs);
  onCleanup(() => clearInterval(id));
  return time;
}
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