Function cleanup

examples/sampling/main.ts:230–236

()

  let cleanedUp = false;
  const cleanup = (): void => {
    if (cleanedUp) return;
    cleanedUp = true;
    if (rafId !== null) cancelAnimationFrame(rafId);
    ro.disconnect();
    chart.dispose();
  };

  window.addEventListener('beforeunload', cleanup);
  import.meta.hot?.dispose(cleanup);