None
https://github.com/w3c/csswg-drafts/commit/7948feb03a9aaceb3a8ee423b07c6e526024cdc2
Yes
The 'strict' and 'content' keywords for the 'contain' property will now include 'style'. Per CSSWG resolution this was (re-)added now that contain:style is well-defined in the specifications.
Subsequently, the spec issues were fixed and consensus was achieved, so contain:style is now being re-added.
None. This is re-adding a single keyword removed in a previous intent for a mature specification that already has shipped support in Blink and Gecko.
Not applicable
Sites may change behavior slightly when contain:strict or contain:content is specified. In particular, CSS counters and ordered lists which include elements both inside and outside the contain:strict or contain:content element would be reset (start again at 1) at the boundaries. This should be very uncommon.
Once Chromium ships this, Gecko has verbally agreed to follow. Webkit has only recently started implementing the containment spec.
Yes
https://bugs.chromium.org/p/chromium/issues/detail?id=1220736
https://www.chromestatus.com/feature/6669265396563968
Contact emails
Explainer
None
Specification
https://github.com/w3c/csswg-drafts/commit/7948feb03a9aaceb3a8ee423b07c6e526024cdc2
API spec
Yes
Summary
The 'strict' and 'content' keywords for the 'contain' property will now include 'style'. Per CSSWG resolution this was (re-)added now that contain:style is well-defined in the specifications.
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