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.
number-optional-number
type.user-select: none
and selectionchange eventur
was deferred to TPAC.Element.offsetParent
was deferred to next week.user-select
properties, one of which is a shorthand for the other. If that seems to work he’ll also investigate if there’s a reason to expose the longhands to the author.