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.
CSS is a language for describing the rendering of structured documents (such as HTML and XML) on screen, on paper, etc.
No issues raised on the proposed amendments. There is one open issue, unrelated, which once resolved will be addressed with a future candidate correction.
Document title, URLs, estimated publication date
CSS Containment Module Level 1 https://drafts.csswg.org/css-contain-1/ Tue 25 June 2024
Abstract
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. CSS is a language for describing the rendering of structured documents (such as HTML and XML) on screen, on paper, etc.
Status
https://drafts.csswg.org/css-contain-1/#sotd (as ED)
Link to group's decision to request the update
Link to Last Call for Review of Proposed Amendments
https://lists.w3.org/Archives/Member/w3c-ac-members/2022OctDec/0009.html
Wide Review of Proposed Amendments
https://github.com/w3c/csswg-drafts/issues?q=is%3Aopen+is%3Aissue+label%3Acss-contain-1+
Issues addressed
No issues raised on the proposed amendments. There is one open issue, unrelated, which once resolved will be addressed with a future candidate correction.
Link to internal AC Review results
https://www.w3.org/2002/09/wbs/33280/containment-1-pc2022/results
Formal Objections
none
Implementation
https://drafts.csswg.org/css-contain-1/implementation-report-2022-09
Patent disclosures
https://www.w3.org/groups/wg/css/ipr/
cc @frivoal