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[CSS] Implement @supports named-feature (anchor-position-follows-transforms) #45431

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[CSS] Implement @supports named-feature (anchor-position-follows-transforms)#45431
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dletorey
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Content:CSSCascading Style Sheets docsFirefox 156

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@Rumyra
Rumyra
opened on Sep 1, 2026

Important

This issue will be worked on by MDN's core team of writers. If you want to contribute, please see the contributor board for issues where we're accepting pull requests.

Acceptance criteria

  • The listed features are documented sufficiently on MDN
  • BCD is updated
  • Interactive example and data repos are updated if appropriate
  • The content has been reviewed as needed

For folks helping with Firefox related documentation

Note

Release notes are now generated at the beginning of the cycle, so a review is all that should be needed for the task. Obviously if there is a gap, fill it.

  • Set bugs to dev-doc-complete
  • Review/add entry to Firefox release notes for enabled/preview features
  • Add/remove entry to Firefox experimental features page for preference/released features

Related Gecko bugs

Other

  • Check content open issues to see if any pertain to the subject matter. If there are any that can be closed because of the work, do so. If there are any that can be fixed relatively quickly because of the knowledge from completing this issue and you have time, feel free to go ahead and fix them.

Activity

  1. Rumyra
    added
    Content:CSSCascading Style Sheets docs
    Firefox 156
    on Sep 1, 2026
  2. Rumyra
    added this to MDN Web Docs Content Teamon Sep 1, 2026
  3. Rumyra
    added the
    Task
    issue type on Sep 1, 2026
  4. Rumyra
    moved this to Todo in MDN Web Docs Content Teamon Sep 1, 2026
  5. github-actions
    added
    needs triageTriage needed by staff and/or partners. Automatically applied when an issue is opened.
    on Sep 1, 2026
  6. Rumyra
    added a parent issue on Sep 1, 2026
  7. Rumyra
    removed
    needs triageTriage needed by staff and/or partners. Automatically applied when an issue is opened.
    on Sep 1, 2026
  8. dletorey
    self-assigned this
    on Sep 8, 2026
  9. dletorey
    moved this from Todo to In Progress in MDN Web Docs Content Teamon Sep 8, 2026

  10. dletorey commented on Sep 9, 2026

    @dletorey
    dletorey
    on Sep 9, 2026
    Contributor

    Related issues and pull requests

  11. dletorey
    moved this from In Progress to In Review in MDN Web Docs Content Teamon Sep 9, 2026

  12. Josh-Cena commented on Sep 28, 2026

    @Josh-Cena
    Josh-Cena
    on Sep 28, 2026
    Member

    Pls set dev-doc-complete so we can close this

  13. Josh-Cena
    marked [CSS] [css-conditional-5] Implement named-feature() function for @supports rule #45429 as a duplicate of this issue on Sep 28, 2026

  14. dletorey commented on Sep 29, 2026

    @dletorey
    dletorey
    on Sep 29, 2026
    Contributor

    Pls set dev-doc-complete so we can close this

    Done

  15. Josh-Cena
    closed this as completedon Sep 29, 2026
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