fix(docs): Prevent TypeError when examples loader data is undefined

[sentry]

This PR addresses a TypeError: Cannot read properties of undefined (reading 'kind') that occurred in the RouteComponent for docs examples. The error manifested during client-side navigation, particularly with React 19's concurrent rendering, where Route.useLoaderData() could return undefined during a pending transition before the loader data was fully committed.

The fix involves adding a null guard (if (!data) return null) immediately after Route.useLoaderData() in the RouteComponent. This ensures that the component gracefully handles the transient undefined state, preventing the crash and maintaining a smooth user experience during navigation.

Fixes TANSTACK-COM-51Z

_{@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: 8213804f-b50b-4e16-9827-79b27e2adcc7

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

---

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	85e84b1	Commit Preview URL Branch Preview URL	Sep 21 2026, 11:05 PM