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[css-contain] layout containment causes stacking contexts #2962

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Aug 2, 2018
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[css-contain] layout containment causes stacking contexts #2962

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5 changes: 4 additions & 1 deletion css-contain-1/Overview.bs
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Expand Up @@ -304,7 +304,9 @@ Layout Containment</h3>

4. The element acts as a containing block for absolutely positioned and fixed positioned descendants.

5. [=Forced breaks=] are allowed within elements with [=layout containment=],
5. The element creates a <a>stacking context</a>.

6. [=Forced breaks=] are allowed within elements with [=layout containment=],
but do not propagate to the parent as otherwise described in [[CSS-BREAK-3#break-between]].

Note: This introduces the previously non-existent possibility that [=forced breaks=]
Expand Down Expand Up @@ -514,6 +516,7 @@ This appendix is <em>informative</em>.
<h3 id="2018-05-24-changes">Changes from the
<a href="https://www.w3.org/TR/2018/CR-css-contain-1-20180524/">Candidate Recommendation of 24 May 2018</a></h3>

* Layout containment causes the element to establish a new stacking context
* Size containment does not apply to tables
* Clarify that the columns and grid properties affect the size of size-contained elements
* Change the animation type of the contain property from discrete to not animatable
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10 changes: 10 additions & 0 deletions css-contain-1/issues-2018-cr.html
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Expand Up @@ -81,6 +81,16 @@ <h1>CSS Contain Level 1 Disposition of Comments for 2018-05-24 CR</h1>
Comment: <a href='https://github.com/w3c/csswg-drafts/issues/2800'>https://github.com/w3c/csswg-drafts/issues/2800</a>
Closed: Accepted
Resolved: Editorial</pre>
<pre class=' open' id='issue-7'>
Issue 7. <a href='#issue-7'>#</a>
Summary: contain:layout is a CB for fixpos/abspos descendants but doesn't establish a stacking context
From: David Baron
Comment: <a href='https://github.com/w3c/csswg-drafts/issues/2942'>https://github.com/w3c/csswg-drafts/issues/2942</a>
Response: <a href='https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-406716817'>https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-406716817</a>
Response: <a href='https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-406735520'>https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-406735520</a>
Response: <a href='https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-407956323'>https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-407956323</a>
Response: <a href='https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-408244344'>https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-408244344</a>
Open</pre>
<script>
(function () {
var sheet = document.styleSheets[0];
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10 changes: 10 additions & 0 deletions css-contain-1/issues-2018-cr.txt
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Expand Up @@ -51,3 +51,13 @@ From: Daniel Holbert
Comment: https://github.com/w3c/csswg-drafts/issues/2800
Closed: Accepted
Resolved: Editorial
----
Issue 7.
Summary: contain:layout is a CB for fixpos/abspos descendants but doesn't establish a stacking context
From: David Baron
Comment: https://github.com/w3c/csswg-drafts/issues/2942
Response: https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-406716817
Response: https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-406735520
Response: https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-407956323
Response: https://github.com/w3c/csswg-drafts/issues/2942#issuecomment-408244344
Open