server function transformation plugin should exclude node_modules #6270
Description
Which project does this relate to?
Start
Describe the bug
When using @cloudflare/vite-plugin instead of target: "cloudflare-module", the SSR build fails with:
[tanstack-start-core::server-fn:ssr] 'return' outside of function at position XXXXXX
The [tanstack-start-core::server-fn:ssr] transformation is parsing third-party library code in node_modules that it doesn't parse when using target: "cloudflare-module". The parser encounters JavaScript patterns it can't handle.
Suggested fix: The server function transformation plugin should exclude node_modules from processing, since server functions are defined in user code, not libraries. But to still allow any tanstack packages from node_modules to be transformed:
See PR #6285
Your Example Website or App
https://github.com/jasongitmail/tanstack-xlsx-repro
Steps to Reproduce the Bug or Issue
git clone https://github.com/jasongitmail/tanstack-xlsx-repro.git
cd tanstack-xlsx-repro
bun install
See steps in README.
Expected behavior
SSR build should succeed with @cloudflare/vite-plugin, matching the behavior of target: "cloudflare-module".
Screenshots or Videos
No response
Platform
"@tanstack/react-query": "5.83.0",
"@tanstack/react-router": "1.144.0",
"@tanstack/react-router-devtools": "^1.144.0",
"@tanstack/react-router-with-query": "1.130.17",
"@tanstack/react-start": "1.145.3",
"@tanstack/router-core": "1.144.0",
"@tanstack/router-devtools-core": "^1.144.0",
"@tanstack/router-generator": "1.145.2",
"@tanstack/router-plugin": "1.145.2",
"@vitejs/plugin-react": "^4.6.0",
"@vitejs/plugin-react-oxc": "^0.2.3",
"vite": "^7.0.4",
"vite-env-only": "^3.0.3",
"vite-tsconfig-paths": "^5.1.4",Mac 26.1
Additional context
No response