CSS Containment Module Level 1 is now a W3C Recommendation(11/21)

Chairs,

It is my pleasure to announce that CSS Containment Module Level 1 is now
a W3C Recommendation:
    https://www.w3.org/TR/2019/REC-css-contain-1-20191121/

This CSS module describes the 'contain' property, which indicates that
the element’s subtree is independent of the rest of the page. This
enables heavy optimizations by user agents when used well.

Most Members who responded to the Call for Review [1] of the Proposed
Recommendation showed support, with several reviewers indicating that
they produce or expect to produce products that use this specification.
There was one comment supporting but suggesting an editorial change [2],
which the CSS Working Group approved and folded into the Recommendation.

Please join us in congratulating the W3C CSS Working Group [3] on this
achievement.

This announcement follows section 7.1.2 of the W3C Process Document:
   https://www.w3.org/2019/Process-20190301/#ACReviewAfter

Thank you,

For Tim Berners-Lee, Director,
Fuqiao Xue, CSS Working Group Team Contact;
Xueyuan Jia, W3C Marketing & Communications

[1] https://lists.w3.org/Archives/Member/w3c-ac-members/2019OctDec/0014.html
[2] https://github.com/w3c/csswg-drafts/issues/4466
[3] https://www.w3.org/Style/CSS/