You are attempting to scroll a FragmentInstance that is only

Error message

You are attempting to scroll a FragmentInstance that is only mounted inside a detached DocumentFragment. No scroll was performed.

What it means

Error "You are attempting to scroll a FragmentInstance that is only mounted inside a detached DocumentFragment. No scroll was performed." thrown in facebook/react.

Source

Thrown at packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js:3703

        targetFiber,
      );
      // If the parent host fiber is a HostRoot, the target is a Container
      // which is not necessarily an Element with a scrollIntoView method.
      if (target.nodeType === DOCUMENT_NODE) {
        // A Document is always in view.
      } else if (target.nodeType === DOCUMENT_FRAGMENT_NODE) {
        const fragment = target as any as DocumentFragment;
        // ShadowRoot always has a host: https://dom.spec.whatwg.org/#ref-for-concept-documentfragment-host%E2%91%A5
        // A generic DocumentFragment doesn't implement this property but conceptually
        // host is a nullable Element: https://dom.spec.whatwg.org/#concept-documentfragment-host
        const host =
          'host' in fragment ? (fragment as any as ShadowRoot).host : null;
        if (host !== null) {
          // The ShadowRoot's host element marks the position where the
          // fragment's content would appear.
          host.scrollIntoView(alignToTop);
        } else if (__DEV__) {
          console.warn(
            'You are attempting to scroll a FragmentInstance that is only ' +
              'mounted inside a detached DocumentFragment. No scroll was ' +
              'performed.',
          );
        }
        return;
      } else {
        // Narrowed down to Element by nodeType check above, but Flow doesn't know that.
        const element = target as any as Element;
        element.scrollIntoView(alignToTop);
      }
    }

    let i = resolvedAlignToTop ? children.length - 1 : 0;
    while (i !== (resolvedAlignToTop ? -1 : children.length)) {
      const child = children[i];
      // For text nodes, use Range API to scroll to their position
      if (enableFragmentRefsTextNodes && child.tag === HostText) {

View on GitHub (pinned to eafeac097b)

When it happens

Trigger: Thrown at packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js:3703 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of facebook/react@eafeac097b (2026-08-21). Data as JSON: /api/errors/9e3418a363d45c11. Report an issue: GitHub.