Enabling prerender causes `.output/server/index.mjs` to not be generated

[jasongitmail]

Which project does this relate to?

Router

Describe the bug

When enabling prerender, TanStack Start fails to generate the .output/server/index.mjs file as expected

See error. The following command was used, where bun run build is defined as vite build --mode prod.

$ bun run build && wrangler deploy

Your Example Website or App

.

Steps to Reproduce the Bug or Issue

1. In vite.config.ts enable prerender:

tanstackStart({
	target: "cloudflare-module",
	customViteReactPlugin: true,
	tsr: { verboseFileRoutes: true },
	prerender: {
		enabled: true,
	},
       pages: [{ path: "/dashboard", prerender: { enabled: false } }],
}),

2. Build and attempt to deploy to cloudflare

bun run build && wrangler deploy

Expected behavior

.output/server/index.mjs should exist after the build even when prerender is enabled.

Screenshots or Videos

No response

Platform

• Router / Start Version: "@tanstack/react-start": "1.129.5"
• OS: macOS
• Bundler: Vite
• Bundler Version: 7.0.4

"@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",
"@tanstack/react-query": "5.83.0",
"@tanstack/react-router": "1.129.5",
"@tanstack/react-router-devtools": "^1.129.5",
"@tanstack/react-router-with-query": "1.129.5",
"@tanstack/react-start": "1.129.5",
"@tanstack/router-core": "1.129.6",
"@tanstack/router-devtools-core": "^1.129.5",
"@tanstack/router-generator": "1.129.5",
"@tanstack/router-plugin": "1.129.5",

Additional context

No response

[jrnxf]

I'm getting this error even on an untouched create-start-app@lastest project :/

[orenaksakal]

output directory seems to be changed with the RC, I was able to get it deployed with this config in wrangler.json
but documentation needs to be updated for sure

...
"main": "./dist/server/server.js",
"assets": {
    "binding": "ASSETS",
    "directory": "./dist/client"
},
...

[lotap]

Found solution in another issue.

viteEnvironment: { name: "ssr" }, is what made "main": "@tanstack/react-start/server-entry", actually work for me instead of pointing to dist/server/server.js directly

#5213 (comment)

[nyomansunima]

Yeah the file doesn't generated when tried to build. Even fresh start falling into error.

[jrnxf]

@tannerlinsley thank you for all the amazing work on this - definitely don't want to come across as impatient, but would love to see a fix for this. I'd consider this P0 given RC was just announced and you can't even build the demo

npx gitpick TanStack/router/tree/main/examples/react/start-basic start-basic
cd start-basic
npm install
npm run dev

[nyomansunima]

in my case, the build success. But the start don't.

[jrnxf]

in my case, the build success. But the start don't.

ahh yeah I could have been more clear - the build "succeeds" but it doesn't build the .output folder needed for the app to start

[nyomansunima]

@jrnxf, tried to add the nitro-nightly

[droutin]

Same problem in generated repo by reate-start-app@lastest

[schiller-manuel]

documentation and migration guides have been updated as well as the nitro-v2-plugin has been fixed.

https://tanstack.com/start/latest/docs/framework/react/hosting#using-nitro-v2

#2863 (comment)

if there are still issues, please create a new github issue including a complete minimal example.