Re-scopes at-rule #1231
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Re-scopes at-rule #1231
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Co-authored-by: Kevin Babbitt <kbabbitt@microsoft.com>
Co-authored-by: Kevin Babbitt <kbabbitt@microsoft.com>
Co-authored-by: Kevin Babbitt <kbabbitt@microsoft.com>
Removed use cases from the explainer. Detect whether an at-rule, with optional prelude and/or block, is supported based on this resolution: w3c/csswg-drafts#6966 (comment) Detect whether a given declaration is supported within an at-rule block based on the proposed @supports-condition w3c/csswg-drafts#12622 (comment)
kbabbitt
approved these changes
Jan 22, 2026
| Allow authors to feature-detect new enhancements to existing at-rules, such as: | ||
| - New media query features and other additions to at-rule preludes | ||
| - New descriptors that may be introduced to rules such as `@font-face` | ||
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Rather than deleting these, should we move them to Non-Goals, with a note that the CSSWG resolved to introduce @supports-condition to handle them? And perhaps a link to the spec: https://drafts.csswg.org/css-conditional-5/#supports-condition-rule
- Addresses TAG comments found [here](w3ctag/design-reviews#1176 (comment)) - moves previous capabilities to non-goals based on the new `@supports-condition` at-rule
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@kbabbitt I've move the previous capabilities of at-rule to non-goals and added an additional paragraph to address TAG's review. |
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Removed 2 use cases for the at-rule function based on 2 CSSWG resolutions.
"Detect whether an at-rule, with optional prelude and/or block, is supported" based on : [css-conditional-5] Add ability to test for at-rule preludes w3c/csswg-drafts#6966 (comment)
"Detect whether a given declaration is supported within an at-rule block" based on the proposed @supports-condition [css-conditional]
@supports-condition, for larger feature queries and named reuse w3c/csswg-drafts#12622 (comment)