Accessing `FormData` (without using it) emits experimental warning

[SimenB]

Version

v18.0.0

Platform

Darwin Simens-MacBook-Pro.local 21.4.0 Darwin Kernel Version 21.4.0: Fri Mar 18 00:45:05 PDT 2022; root:xnu-8020.101.4~15/RELEASE_X86_64 x86_64

Subsystem

No response

What steps will reproduce the bug?

node -e FormData

How often does it reproduce? Is there a required condition?

Always.

What is the expected behavior?

No experimental warning should be emitted by simple accessing the variable without using it, similar to accessing fetch itself.

What do you see instead?

(node:97789) ExperimentalWarning: The Fetch API is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)

Additional information

Like typeof fetch not emitting any warning, typeof FormData shouldn't. Using it should emit, but not simply accessing the variable.

[targos]

This is tricky to do, because the classes are defined in the undici dependency (where there is no experimental warning), so we would have to make wrapper classes that emit in the constructor, but I can't find a good way to do that without loading undici (and that has side-effects that breaks some of our tests).

[targos]

@nodejs/undici

[aduh95]

We could consider removing the runtime warning for FormData altogether (but keep the experimental status in the docs).

[mcollina]

Let's remove the experimental warning from FormData.