Re: [csswg] Agenda for Jan 14 CSS Snapshot 2026 breakout

Here is the list of resolutions we took in the breakout session today. Since attendance was light, we will be holding off on publishing the 2026 snapshot until next month to allow anyone to provide more feedback. If any of these seem incorrect, please follow the links from the agenda to add comments.

Snapshot 2026 resolutions

Add geometry-1 to Rough Interop

Safe-to-release changes:

Add ::marker
Add text-box-trim and text-box-edge (and shorthand)
Add accent-color and auto value once css-ui-4 has been republished
Add env(safe-area-inset-*)
Add these features from selectors-4:
    :scope
    :defined
    :focus-within
    :dir()
    :any-link
    :open
    :popover-open
    :modal
    :fullscreen
    :placeholder-shown
    :default
    :valid
    :invalid
    :required
    :optional
    Selector lists in :nth-child() and :nth-last-child()

Thanks,

Alan

From: Sebastian Zartner <sebastianzartner@gmail.com>
Date: Wednesday, January 14, 2026 at 3:23 AM
To: www-style list <www-style@w3.org>
Subject: [csswg] Agenda for Jan 14 CSS Snapshot 2026 breakout


Time/Phone/Zoom details available to WG Members in w3c-css-wg
See https://lists.w3.org/Archives/Member/w3c-css-wg/2024OctDec/0116.html


https://www.timeanddate.com/worldclock/fixedtime.html?iso=20260114T16


1. [css-2026] Publish Snapshot as Group Note
https://github.com/w3c/csswg-drafts/issues/13332


2. [css-2026][css-pseudo-4] Add ::marker to Safe to Release Exceptions
https://github.com/w3c/csswg-drafts/issues/12816


3. [css-2026][selectors-4] Add features from Selectors 4 to Safe to
Release Exceptions
https://github.com/w3c/csswg-drafts/issues/12797


4. [css-2026][css-inline-3] Add text-box-trim and text-box-edge to
Safe to Release exceptions
https://github.com/w3c/csswg-drafts/issues/12782


5. [css-2026][css-ui-4] Add accent-color property, auto value for
outline-color, and <url-set> value for cursor to Safe to Release
exceptions
https://github.com/w3c/csswg-drafts/issues/12781


6. [css-2026][css-env-1] Add env(safe-area-inset-*) to Safe to Release
exceptions
https://github.com/w3c/csswg-drafts/issues/12780


7. [css-2026][css-transitions-2] Add transition-behavior,
@starting-style, and CSSStartingStyleRule to Safe to Release
exceptions
https://github.com/w3c/csswg-drafts/issues/12778


8. [css-2026][geometry-1] Add Geometry 1 to Rough Interop
https://github.com/w3c/csswg-drafts/issues/12698


Sebastian