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Re: [csswg-drafts] [css-counter-style] overriding symbolic counter styles. (#3584)

From: Mike Bremford via GitHub <sysbot+gh@w3.org>
Date: Wed, 26 May 2021 16:51:14 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-848942061-1622047872-sysbot+gh@w3.org>
Hmm, good point. I agree the question to resolve is - if a "special" counter like disc, circle, square is extended, does it remain special?

If we try and propagate this "specialness" through inheritance, I can see it getting quite complex.
@counter-style my-circle { system: extends circle; suffix: ":" }   /* circle or \25E6? */
@counter-style my-circle2 { system: extends circle; symbols: \25E6 }   /* circle or \25E6? */
@counter-style my-circle3 { system: extends square; symbols: \25E6 }   /* circle or \25E6? */
@counter-style tmp { system: extends disc; symbols: A } 
@counter-style my-circle5 { system: extends tmp; symbols: \25E6 }   /* circle or \25E6? */
I guess there are probably three options:
1. The moment you extend a special type, it becomes not special. We lose the ability to change the prefix/suffix for special types, which seems like a loss.
2. You can extend a special type and it remains special unless "symbols" is overridden, at which point it becomes not special.
3. Extending a special type means specialness remains - presumably, transitively, as with `my-circle5`

I can see an argument for 1 or 2, but not 3 myself - it starts to get weird and complex for what is, ultimately, something we're only doing for compatibility.

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