Function onScroll

src/hold-stream.ts:156–158

()

): () => void {
  const threshold = options?.thresholdPx ?? DEFAULT_STREAM_SCROLL_THRESHOLD;
  const onScroll = () => {
    syncStreamScrollFollow(el, state, threshold);
  };
  el.addEventListener("scroll", onScroll, { passive: true });
  return () => el.removeEventListener("scroll", onScroll);
}