Type safety breaks around Dates and other non standard objects when using server functions

[AlexGaudon]

Which project does this relate to?

Start

Describe the bug

Start Server Functions don't respect TanStack Router specified transformers.

See pictures below:

SuperJSON is specified

Function returns a Date, with the proper type

Loader gets the incorrect type (the actual value is just a stringified date)

Your Example Website or App

https://github.com/AlexGaudon/start-date-repro

Steps to Reproduce the Bug or Issue

1. Clone the repo
2. Run bun install
3. Run bun --bun run dev
4. Navigate to http://localhost:3000 and observe the error

Expected behavior

As a user, I expect server functions to automatically conform to the transformer specified.

Screenshots or Videos

No response

Platform

• OS: macOs
• Browser: Chrome + FireFox
• Version: latest

Additional context

No response

[aretrace]

I think a future test suite with various serializers (e.g., Rich-Harris/devalue) would be a good idea.

[SeanCassiere]

This should be getting addressed in the server functions PR.

[AlexGaudon]

Just for clarity, are you talking about #2513