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added support for specific named-features - #30464

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Elchi3 merged 7 commits into
mdn:mainfrom
dletorey:45431-named-features
Sep 15, 2026
Merged

Elchi3 merged 7 commits into
mdn:mainfrom
dletorey:45431-named-features

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@dletorey

@dletorey dletorey commented Sep 9, 2026

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Summary

  • Added firefox support for @supports named-features()
  • Added @supports named-features(anchor-position-follows-transforms)
  • Added @supports named-features(single-axis-scroll-container)

Test results and supporting details

  • Tested using this codepen
  • Chrome versions:
    • 150 - only anchor-position-follows-transforms
    • 152 - both work
    • Beta
    • Canary
  • Edge versions:
    • 150 - only anchor-position-follows-transforms
    • 152 - only anchor-position-follows-transforms
    • Beta - only anchor-position-follows-transforms
    • Canary 155 - both work
  • Safari versions - no support
    • 26.1
    • Tech Preview 251
  • Firefox (with flag layout.css.anchor-positioning.follows-transforms.enabled)
    • Nightly - only anchor-position-follows-transforms
    • Beta - no suppport

Related issues

@github-actions github-actions Bot added the data:css Compatibility data for CSS features. https://developer.mozilla.org/docs/Web/CSS label Sep 9, 2026
@github-actions github-actions Bot added the size:m Pull request changing 25-100 lines of code. label Sep 9, 2026
@github-actions

github-actions Bot commented Sep 9, 2026

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Tip: Review these changes grouped by change (recommended for most PRs), or grouped by feature (for large PRs).

Comment thread css/at-rules/supports.json Outdated
@ddbeck

ddbeck commented Sep 11, 2026

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Since Florian alerted me to this, I just want to note that I'm happy with the structure here, but I don't have anything to add to the substance of the data.

Comment thread css/at-rules/supports.json Outdated
@github-actions

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The lint check found auto-fixable issues. Apply suggested changes (attributed to bcd-linter), or to fix all at once, run npm run lint:fix locally.

See also: Automated lint suggestions on pull requests

@dletorey
dletorey requested a review from Elchi3 September 14, 2026 13:52

@Elchi3 Elchi3 left a comment

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Thanks Dave! 👍

@Elchi3
Elchi3 merged commit 90e88ae into mdn:main Sep 15, 2026
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@mdn-bot mdn-bot mentioned this pull request Sep 15, 2026
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data:css Compatibility data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:m Pull request changing 25-100 lines of code.

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4 participants