fix(docs): prevent destructuring undefined loaderData

[sentry]

This PR addresses a TypeError that occurs when Docs() components attempt to destructure content, filePath, and title from Route.useLoaderData() when the loader data is undefined.

The issue arises during client-side navigation, particularly when navigating to docs paths that implicitly redirect (e.g., a framework-less path redirecting to a framework-specific path). In such scenarios, the component can render before the loader has resolved its data or after a redirect has been initiated, leading to useLoaderData() returning undefined.

To fix this, a guard has been added to both src/routes/_library/$libraryId/$version.docs.$.tsx and src/routes/_library/$libraryId/$version.docs.framework.$framework.$.tsx.

Changes made:

1. Route.useLoaderData() is now assigned to a loaderData variable.
2. All React hooks (useParams, useLoaderData, useMatch, useLocation) are called before any conditional return to maintain stable hook order.
3. An early return if (!loaderData) return null; is introduced. This prevents destructuring undefined and allows the component to gracefully handle the transient state where loader data is not yet available.
4. The actual destructuring of content, filePath, and title now happens from the loaderData variable, only after it's confirmed to be defined.

This approach aligns with the existing optional chaining (loaderData?.title) already present in the head() and headers() functions within the same route, ensuring consistent handling of potentially undefined loader data.

Fixes TANSTACK-COM-52Z

_{@sentry <feedback>: Autofix iterates on these changes
@sentry stop iterating: Autofix stops iterating on this run}

_{This PR was automatically generated by Sentry. You can adjust this setting at any time.}

[coderabbitai]

Important

Review skipped

Bot user detected.

To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: ec921cb7-1fe0-43bb-8dfa-284d9e029e40

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

• Autopilot · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

Autopilot is currently an internal CodeRabbit preview.

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Workers

The latest updates on your project. Learn more about integrating Git with Workers.

Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	tanstack-com	ca26fd9	Commit Preview URL Branch Preview URL	Sep 30 2026, 11:08 PM