Function subscribe

src/ink/components/ScrollBox.tsx:189–192

(listener: () => void)

      return el.stickyScroll ?? Boolean(el.attributes['stickyScroll']);
    },
    subscribe(listener: () => void) {
      listenersRef.current.add(listener);
      return () => listenersRef.current.delete(listener);
    },
    setClampBounds(min, max) {
      const el = domRef.current;
      if (!el) return;