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.
em
is computed font-size
; ex
, ch
measure actual used value font metrics.
@font-feature-values
object model dependency on missing WebIDL feature.
letter-spacing: <length>
not disable inter-letter justification. See thread.