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CSS Working Group @csswg

We're Cascading with Style... w3.org/Style/CSS/

Joined March 2008
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CSS Working Group@csswg
28 Mar 2025
Twitter's ability to surface replies is pretty broken atm, so if you have comments for us please reach out via other means...
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Notes Telecon 2025-10-08 w3.org/blog/CSS/2025/10/09/m… web-animations, css-animations, cssom-view, css-pseudo, css-anchor-position
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Updated WD of CSS Anchor Positioning L1 Mostly adjustments to how default alignment works, plus renaming the x/y-self-foo keywords to self-x/y-foo w3.org/blog/CSS/2025/10/07/c…

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(And lots of other small fixes and clarifications, as usual.)
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Notes Telecon 2025-09-24 w3.org/blog/CSS/2025/09/25/m… css-images, css2, css-sizing, css-align, css-tables, css-anchor-position, css-animations, web-animations
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Notes CSS Values 5 Breakout w3.org/blog/CSS/2025/09/24/c…
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Notes Telecon 2025-09-17 w3.org/blog/CSS/2025/09/18/m… css-env, css-ui, css-pseudo, css-forms, css-backgrounds, css-flexbox
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CSS Grid L3 (aka Masonry Layout) updated WD Some algo updates, and a few open questions we'd like feedback on! w3.org/blog/CSS/2025/09/18/m…
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Notes CSS Overflow Breakout 2025-09-17 w3.org/blog/CSS/2025/09/17/m… css-overflow
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Notes Telecon 2025-09-10 w3.org/blog/CSS/2025/09/12/m… css-color, css-conditional, web-animations, css-animations
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Notes Telecon 2025-09-03 w3.org/blog/CSS/2025/09/05/m… css-text-decor, css-grid/masonry, css-overflow
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Notes Breakout CSS Snapshot 2025 w3.org/blog/CSS/2025/09/03/m…

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Notes Telecon 2025-08-13 w3.org/blog/CSS/2025/08/13/m… cssom-view, css-grid, css-anchor-position, css-animations
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Some recent discussions on developing masonry layout: - developer.chrome.com/blog/ma… - webkit.org/blog/16587/item-f… - webkit.org/blog/17219/item-f… See overview of key open issues at github.com/w3c/csswg-drafts/… Current official draft at w3.org/TR/css-grid-3/, incorporating item-flow (2 options).

Brick by brick: Help us build CSS Masonry  |  Blog  |  Chrome for Developers

Help test the proposed masonry syntax in Chromium.

developer.chrome.com
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Earlier draft announcement, for reference: w3.org/blog/CSS/2025/03/28/c… CSSWG is looking for author feedback on these open questions, so please help us by exploring the ideas and letting us know what you think!
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Notes Telecon 2025-08-06 w3.org/blog/CSS/2025/08/07/m… css-color-adjust, css-anchor-position, web-animations, css-multicol, css-env, css-pseudo, css-page-floats, css-inline
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Notes Gap Decoration Breakout 2025-08-06 lists.w3.org/Archives/Public…

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Notes Telecon 2025-07-16 w3.org/blog/CSS/2025/07/16/m… css-cascade, css-forms, css-color, cssui, css-view-transitions, css-animations
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Notes Telecon 2025-07-09 w3.org/blog/CSS/2025/07/09/m… css-color-hdr, css-ui, css-env, css-fonts, css-conditional
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Notes Telecon 2025-07-02 w3.org/blog/CSS/2025/07/03/m… css-borders-4, css-text, css-values, css-backgrounds
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Notes Scope Breakout 2025-07-02 w3.org/blog/CSS/2025/07/02/m… css-cascade
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