createIsomorphicFn resolves to client implementation during SSR

[EskiMojo14]

Which project does this relate to?

Start

Describe the bug

router/packages/start-plugin/src/compilers.ts

Line 532 in 8662b4c

const resolvedEnv = opts.env === 'ssr' ? 'client' : opts.env

Isomorphic functions use client implementation during SSR, because the code says to.

Your Example Website or App

https://stackblitz.com/edit/tanstack-router-cnvd1vfk?file=app%2Froutes%2Findex.tsx,app%2Futils%2Fiso-fns.ts&preset=node

Steps to Reproduce the Bug or Issue

Create an isomorphic function, and log its result during SSR and CSR

Expected behavior

SSR should use the server implementation, because it's on the server.

Screenshots or Videos

No response

Platform

• OS: Windows
• Browser: Chrome
• Version: 132

Additional context

prompted from https://discord.com/channels/719702312431386674/1333870036431016047