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docs(cloudflare): Add a React Router on Cloudflare Workers guide - #20095

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@sentry-junior sentry-junior Bot commented Oct 19, 2026 •

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DESCRIBE YOUR PR

Since SDK 11.5.0, @sentry/react-router/cloudflare exports createSentryServerInstrumentation (getsentry/sentry-javascript#25042), so React Router apps on Cloudflare Workers can use React Router's instrumentation API the same way as on Node.js. The docs had no page for React Router on plain Workers, only Hydrogen with React Router for Oxygen.

This adds a "React Router on Cloudflare" page under Cloudflare frameworks. It follows the same structure as the main React Router guide: install, feature selection, Wrangler config, client config, and server config with the Sentry Cloudflare Vite plugin and instrument.server.ts. For entry.server.tsx, it shows only the Sentry changes as a diff (wrapSentryHandleRequest, injectTraceMetaTags, handleError, and the instrumentations export), so the page doesn't copy the template's rendering code. Source maps link to the React Router guide. The setup follows the Cloudflare variant of the react-router-8-framework e2e app in sentry-javascript.

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PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

  • Checked Vercel preview for correctness, including links
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LEGAL BOILERPLATE

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. and is gonna need some rights from me in order to utilize my contributions in this here PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

EXTRA RESOURCES

via Jan Peer Stöcklmair.

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Co-Authored-By: Jan VamPeer Stöcklmair <jan.peer@sentry.io>
…uter guide

Use the same step layout as the main React Router guide and show only
the Sentry-specific changes to the server entry and Vite config instead
of full template files.

Co-Authored-By: Jan VamPeer Stöcklmair <jan.peer@sentry.io>
…e page

master removed the SplitLayout components, so the page failed to prerender.
…n guide copy

Add React Router to the framework list on the Cloudflare guide, turn the
server entry steps into a list that leads with why, and add a test
button to the verify step like the other Cloudflare framework guides.

Co-Authored-By: Jan VamPeer Stöcklmair <jan.peer@sentry.io>

Co-Authored-By: Jan VamPeer Stöcklmair <jan.peer@sentry.io>

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