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, the Future of CSS syndicator, and the issue list on Github.
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.