TanStack / TanStack/router

The boilerplate code in server entry point docs is giving type error

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Dominant language
TypeScript
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Description

Which project does this relate to?

Start

Describe the bug

The boilerplate code in the Server Entry Point TanStack Start docs page is giving type errors.

import handler, { createServerEntry } from '@tanstack/react-start/server-entry'

type MyRequestContext = {
  hello: string
  foo: number
}

declare module '@tanstack/react-start' {
  interface Register {
    server: {
      requestContext: MyRequestContext
    }
  }
}

export default createServerEntry({
  async fetch(request) {
    return handler.fetch(request, { context: { hello: 'world', foo: 123 } })
  },
})
Complete minimal reproducer

https://github.com/flexdinesh/tanstack-start-request-context-repro/blob/main/src/server.ts

Steps to Reproduce the Bug
  1. bootstrap a new tanstack app pnpm dlx @tanstack/cli@latest create
  2. create src/server.ts file
  3. copy paste the code from docs
Expected behavior

The types should be inferred and shouldn't show an error

Screenshots or Videos
Image
Platform
  • Router / Start Version: 1.169.2
  • OS: macOS
  • Bundler: vite
  • Bundler Version: 8.0.12
Additional context

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at the Server Entry Point TanStack Start docs page and reproduce the snippet in the linked minimal reproducer's src/server.ts. Check the createServerEntry and handler.fetch types in the stated setup; done when the documented example type-checks without errors.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
documentation
Issue type
Documentation
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
68/100

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