📝 CSS formatter converts custom identifiers to lowercase

[Josh Wooding]

Environment information

Playground link

Configuration

No response

Playground link

https://biomejs.dev/playground/?files.main.css=LgBjAG8AbgB0AGEAaQBuAGUAcgAgAHsACgAgACAAZwByAGkAZAAtAHQAZQBtAHAAbABhAHQAZQAtAGEAcgBlAGEAcwA6ACAAIgBsAGEAYgBlAGwAIABmAG8AcgBtAEMAbwBuAHQAcgBvAGwAIgAKAH0ACgAKAC4AYwBvAG4AdABhAGkAbgBlAHIAIABpAG4AcAB1AHQAIAB7AAoAIAAgAGcAcgBpAGQALQBhAHIAZQBhADoAIABmAG8AcgBtAEMAbwBuAHQAcgBvAGwAOwAKAH0A

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[Josh Wooding]

Potentially related issue/solution: #3068

[Denis Bezrukov]

@ematipico

Hmm,

I’m not sure that this is the best or easiest solution here. I think we have two ways to solve it:

1. Don’t change the case at all.
2. Change the case only for reserved words. However, to achieve this, we have to know all of them inside the parser/formatter.

[Emanuele Stoppa]

Don’t change the case at all.

Maybe we should evaluate this solution. The formatter doesn't have any semantic knowledge of the document, so I suppose any "unknown" things should be left untouched.