wpt / css / css-flexbox / percentage-margins-001.html

Status: PASS | Duration: 1ms | Subtests: 3/3 | Open test on wpt.live | wpt.fyi

TestTest SourceSubtests (3/3)

Data from commit:
708eb61 WPT runner: support mismatch reftests and multiple rel=match links (#665) (2026-08-09)

SubtestStatusMessage
.flexbox 1PASS
.flexbox 2PASS
.flexbox 3PASS

/css/css-flexbox/percentage-margins-001.html

<!DOCTYPE html>
<title>CSS Flexbox: percent margins with flex child</title>
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#flex-containers">
<link rel="help" href="https://drafts.csswg.org/css2/box.html#margin-properties">
<link rel="help" href="https://bugs.webkit.org/show_bug.cgi?id=93411">
<meta name="assert" content="This test ensures that percent margins always are computed with respect to the containing block's width even when there is flex on any child.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<body onload="checkLayout('.flexbox')">
<div id=log></div>

<div class="flexbox" style="display:flex; flex-direction: column; background-color: salmon; height: 300px; width: 400px;">
    <div style="margin: 10%; background-color: orange; height: 5px; flex: 1" data-expected-width=320 data-expected-height=135></div>
    <div style="margin: 10%; background-color: orange; height: 5px;" data-expected-width=320 data-expected-height=5></div>
</div>

<div class="flexbox" style="display:flex; background-color: salmon; height: 300px; width: 400px;">
    <div style="margin: 10%; background-color: orange; height: 5px; flex: 1 5px" data-expected-width=235 data-expected-height=5></div>
    <div style="margin: 10%; background-color: orange; height: 5px; width: 5px" data-expected-width=5 data-expected-height=5></div>
</div>

<div class="flexbox" style="display:flex; background-color: salmon; height: 300px; width: 400px; padding: 100px;">
    <div style="margin: 10%; background-color: orange; height: 5px; flex: 1 5px" data-expected-width=235 data-expected-height=5></div>
    <div style="margin: 10%; background-color: orange; height: 5px; width: 5px" data-expected-width=5 data-expected-height=5></div>
</div>

</body>