[csswg-drafts] [css-conditional-5] Multiple `@supports-condition` with the same name (#12973)

cdoublev has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-conditional-5] Multiple `@supports-condition` with the same name ==
  > Multiple `@supports-condition` rules with the same name in a style sheet are invalid and must be ignored.

If I am picky, this is slightly ambiguous: only consecutive rules must be ignored, I guess.

But is this intentional?

  - `@color`: unspecified
  - `@counter-style`: the last one wins
  - `@font-palette-values`: unspecified
  - `@function`: the last one wins
  - `@keyframes`: the last one wins
  - `@property`: the last one wins
  - `@position-try`: the last one wins

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/12973 using your GitHub account


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Received on Saturday, 18 October 2025 06:48:26 UTC