Function stopObserving

src/useOnInView.tsx:124–133

()

      );

      function stopObserving() {
        // Centralized teardown so both manual destroys and React ref updates share
        // the same cleanup path (needed for React versions that never call the ref with `null`).
        if (destroyed) return;
        destroyed = true;
        destroyObserver();
        observedElementRef.current = null;
        observerCleanupRef.current = undefined;
        lastInViewRef.current = undefined;
      }

      observerCleanupRef.current = stopObserving;