v1.7.8 breaks non-string classNames

[relative]

What package within Headless UI are you using?

@headlessui/react

What version of that package are you using?

v1.7.13 (occurs in @‌insiders, appeared in @‌1.7.8)

What browser are you using?

N/A

Reproduction URL

https://github.com/relative/headlessui-repro

Describe your issue

Starting in commit aac78d52b7d066d6cfe507c67a7bb4e4567d7ce5, src/utils/render.ts will now stringify classNames in the render function used by many Headless UI components

This breaks components that allow functions to be passed to classNames, e.g. react-router-dom's NavLink as described in #2317.

[thecrypticace]

Hey! Thanks for reporting this one — completely missed this possibility. I've merged the fix for this in #2412.

Could you give the latest insiders build a test to see if it's fixed for you? It'll take a couple of minutes for the new version to publish

npm install @headlessui/react@insiders

[relative]

looks like it is fixed! thank you

[thecrypticace]

Fantastic! The fix will go out in a tagged release soon.