This is a page from the Cascading Style Sheets Working Group Blog. Some other places to find information are the “current work” page, the www-style mailing list, and the Future of CSS syndicator.
Do you want to know how the CSS WG works? Fantasai has written about:csswg, An Inside View of the CSS Working Group at W3C.
@counter-style width descriptor renamed to pad.
getComputedStyle() for grid layout properties.
an+b syntax redefinition in CSS3 Syntax.
The CSS Working Group has published an updated Working Draft of Selectors Level 4. Selectors is a pattern-matching syntax for identifying sets of elements in a document, and is used e.g. for applying CSS declarations to elements in a document tree.
Additions include some new selectors: :blank for elements that are empty or contain only white space, and :placeholder-shown for inputs that are showing a placeholder. Review and improved naming suggestions are particularly welcome on these—and also on the drag and drop pseudos.
Another important change is lifting restrictions on :matches() and :not() to accept complex selectors, and the definition of two profiles, one for CSS matching and another for less performance-intensive uses like querySelector. We particularly encourage implementers to comment on whether this split is reasonable, or whether different things should be included/excluded.
The Working Draft includes a list of changes since the previous WD.
As always, please send feedback to the (archived) public mailing list www-style@w3.org with the spec code ([selectors]) and your comment topic in the subject line. (Alternatively, you can email one of the editors and ask them to forward your comment.)
align-self property values, like they do in other layout modules such as flexbox (and also block)
flow-into.
:blank to match.
The CSS Working Group has published an updated Working Draft of CSS Grid Layout. This CSS module defines a two-dimensional grid-based layout system optimized for user interface design.
This is a major update: not only has the draft generally been reorganized and much of the prose rewritten to fill in missing details, avoid repetition, improve precision and terminology, and ensure alignment with Flexbox, but it’s switched to a new positioning model. The old grid layout model uses properties to indicate the starting row/column and the item’s span. The new grid layout model positions each edge of the item to a grid line.
There are tons of issues marked in the draft, such as:
We’re totally looking for feedback, particularly on syntax issues, so please send comments to the (archived) public mailing list www-style@w3.org with the spec code ([css-grid-layout]) and your comment topic in the subject line. (Alternatively, you can email one of the editors and ask them to forward your comment.)
Comments have also been enabled on the cross-post over at CSS3.info. We strongly encourage feedback and suggestions for improvement from the design community!
The CSS Working Group has published an updated Candidate Recommendation of CSS Values and Units Level 3. This CSS3 module describes the common values and units that CSS properties accept and the syntax used for describing them in CSS property definitions.
This is publication mainly just incorporates some minor fixes and clarifications. It also defines the interaction of scrollbars and viewport units. Changes since the last publication are listed in the Changes section.
As always, please send feedback to the (archived) public mailing list www-style@w3.org with the spec code (>>[css3-values]<<) and your comment topic in the subject line. (Alternatively, you can email one of the editors and ask them to forward your comment.)
color-correction is still needed.
nav-* properties to level 4. Contact Web and TV and Opera about nav-* changes. Ask for comments from WAI PF and SVG and any groups we asked for previous Last Call.
The CSS Working Group has published a first public Working Draft of the CSS Overflow Module Level 3.
This module describes:
This draft is still relatively early in development, but the group welcomes feedback on all aspects of the draft.
As always, please send feedback to the (archived) public mailing list www-style@w3.org with the spec code ([css-overflow-3]) and your comment topic in the subject line.
#123abc to be a valid ID selector, to match HTML5. Need to collect data on this.
:nth-child()/etc don’t require a parent: they’re based on siblings. This is a change from Selectors Level 3 REC.
:matches() to the specificity of the actual matched selector.
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