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.
The CSS Working Group has published an updated Working Draft of CSS Box Alignment Level 3. CSS3 Box Alignment defines a common set of properties for aligning boxes within their containers in the various CSS box layout models: block layout, table layout, flex layout, and grid layout. In particular, it attempts to provide the horizontal and vetical alignment capabilities missing from CSS block layout and to tie that together with alignment models in tables, grid, and flexbox.
This draft is a revision of the previous First Public Working Draft: the range of values allowed in each alignment property has been extended and improved, and many details have been added on how exactly alignment works in various layout contexts, including absolutely-positioned layout.
Changes since the last publication are listed in the changes section. It’s still in the exploratory stages, but this revision starts the process of stabilizing the overall design.
As always, please send feedback to the (archived) public mailing list firstname.lastname@example.org with the spec code (
[css-align]) and your comment topic in the subject line. (Alternatively, you can email one of the editors and ask them to forward your comment.)