Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: f6a41925ab1d9aa1a650161f6d674802f7a468fe
https://github.com/WebKit/WebKit/commit/f6a41925ab1d9aa1a650161f6d674802f7a468fe
Author: Alan Baradlay <[email protected]>
Date: 2026-06-04 (Thu, 04 Jun 2026)
Changed paths:
A
LayoutTests/imported/w3c/web-platform-tests/css/css-flexbox/flex-item-min-width-min-content-max-width-expected.html
A
LayoutTests/imported/w3c/web-platform-tests/css/css-flexbox/flex-item-min-width-min-content-max-width-ref.html
A
LayoutTests/imported/w3c/web-platform-tests/css/css-flexbox/flex-item-min-width-min-content-max-width.html
M Source/WebCore/rendering/RenderBox.cpp
Log Message:
-----------
[Flex] A flex item with min-width: min-content is clamped to a smaller
max-width
https://bugs.webkit.org/show_bug.cgi?id=316353
Reviewed by Antti Koivisto.
<div style="display: flex">
<div style="min-width: min-content; max-width: 40px">X XXXXXXXXXXX</div>
</div>
The flex item should be at least as wide as its min-content (the widest word),
because min-width wins over a smaller max-width.
Instead it was clamped to the 40px max-width.
A box caches its min-content and max-content contributions already clamped by
its
own min-width and max-width. That clamp honored a max-content min-width but not
a
min-content one, so min-width: min-content counted as zero and the smaller
max-width pulled the cached contribution down.
A flex item takes that contribution as its used size, so it ended up at
max-width.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-flexbox/flex-item-min-width-min-content-max-width-expected.html:
Added.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-flexbox/flex-item-min-width-min-content-max-width-ref.html:
Added.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-flexbox/flex-item-min-width-min-content-max-width.html:
Added.
* Source/WebCore/rendering/RenderBox.cpp:
(WebCore::RenderBox::constrainIntrinsicLogicalWidthsByMinMax const):
Canonical link: https://commits.webkit.org/314599@main
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