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sousa-gecko/testing/web-platform/tests/css/css-multicol/column-height-022.html
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Morten Stenshorne db2bb86dc8 Bug 2000724 [wpt PR 56075] - Finalize column-height:0 support., a=testonly
Automatic update from web-platform-tests
Finalize column-height:0 support.

Spec resolution here:
https://github.com/w3c/csswg-drafts/issues/12787#issuecomment-3530646130

In short: allow column-height:0, so that rows may become 0px tall. The
fragmented flow is still guaranteed progress, since a fragmentainer has
to accept at least 1px of content, according to
https://drafts.csswg.org/css-break/#breaking-rules

This was pretty much what we were already doing, but there was a problem
before the very first zero-height row, in that we'd consider it to be
full even before layout.

Bug: 403183884
Change-Id: I5cf64697b0f3e1788fea43f95abfed912a9d571e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7156852
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1546150}

--

wpt-commits: 119ac9fd841b9e4cd198c5e13576e6707600fdf9
wpt-pr: 56075
2025-11-19 16:53:26 +00:00

13 lines
844 B
HTML

<!DOCTYPE html>
<title>column-height: 0</title>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-multicol-2/#ch">
<link rel="help" href="https://drafts.csswg.org/css-multicol-2/#cwr">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div style="position:relative; columns:2 / 0; padding-bottom:1px; border-bottom:1px solid green; width:100px; gap:49px 0; column-fill:auto; background:red;">
<div style="height:6px; background:green;"></div>
<div style="position:absolute; top:1px; left:0; width:100%; height:48px; background:green;"></div>
<div style="position:absolute; top:50px; left:0; width:100%; height:48px; background:green;"></div>
</div>