wpt / css / css-flexbox / percentage-size.html

Status: PASS | Duration: 2ms | Subtests: 8/8 | Open test on wpt.live | wpt.fyi

TestTest SourceSubtests (8/8)

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
.flexbox 4PASS
.flexbox 5PASS
.flexbox 6PASS
.flexbox 7PASS
.flexbox 8PASS

/css/css-flexbox/percentage-size.html

<!DOCTYPE html>
<title>CSS Flexbox: Percentage size in flexbox children</title>
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#flex-containers">
<link rel="help" href="https://drafts.csswg.org/css-sizing-3/#percentage-sizing">
<link rel="help" href="https://bugs.webkit.org/show_bug.cgi?id=81809">
<meta name="assert" content="This test checks that percentage height/width values are correctly resolved in flexbox children.">
<style>
.flexbox {
    display: flex;
}
.column, .column .fixed {
    height: 50px;
}
.row, .row .fixed {
    width: 50px;
}
.container > div {
    outline: 2px solid blue;
}
.row > div > div {
    height: 20px;
}
.flexbox > div {
    flex: 0 0 auto;
}
.column > .flexbox {
    flex-direction: column;
}
.container > div > :nth-child(1) {
    background-color: orange;
}
.container > div > :nth-child(2) {
    background-color: yellow;
}
.container > div > :nth-child(3) {
    background-color: salmon;
}
.container > div > :nth-child(4) {
    background-color: purple;
}
</style>
<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="container row">
    <div class="flexbox">
        <div style='width: 10px; min-width: 50%;' data-expected-width=25></div>
        <div style='width: 50%;' data-expected-width=25></div>
        <div style='width: 10px; max-width: 50%;' data-expected-width=10></div>
        <div style='min-width: 10px; width: 100px; max-width: 50%;' data-expected-width=25></div>
    </div>
</div>

<div class="container row" style='width: 100px'>
    <div class="flexbox fixed">
        <div style='width: 10px; min-width: 50%;' data-expected-width=25></div>
        <div style='width: 50%;' data-expected-width=25></div>
        <div style='width: 10px; max-width: 50%;' data-expected-width=10></div>
        <div style='min-width: 10px; width: 100px; max-width: 50%;' data-expected-width=25></div>
    </div>
</div>

<div class="container column" style='margin-bottom: 100px'>
    <div class="flexbox" style="height: auto">
        <div style='height: 10px; min-height: 50%;' data-expected-height=10></div>
        <div style='height: 50%;' data-expected-height=0></div>
        <div style='height: 10px; max-height: 50%;' data-expected-height=10></div>
        <div style='min-height: 10px; height: 100px; max-height: 50%;' data-expected-height=100></div>
    </div>
</div>

<div class="container column">
    <div class="flexbox fixed">
        <div style='height: 10px; min-height: 50%;' data-expected-height=25></div>
        <div style='height: 50%;' data-expected-height=25></div>
        <div style='height: 10px; max-height: 50%;' data-expected-height=10></div>
        <div style='min-height: 10px; height: 100px; max-height: 50%;' data-expected-height=25></div>
    </div>
</div>

<div class="container row">
    <div class="flexbox">
        <div style="flex: 0 0 50%" data-expected-width=25></div>
    </div>
</div>

<div class="container column">
    <div class="flexbox">
        <div style="flex: 0 0 50%" data-expected-height=0></div>
    </div>
</div>

<div class="container row">
    <div class="flexbox fixed">
        <div style="flex: 0 0 50%" data-expected-width=25></div>
    </div>
</div>

<div class="container column">
    <div class="flexbox fixed">
        <div style="flex: 0 0 50%" data-expected-height=25></div>
    </div>
</div>

</body>