Blitz - WPT: contain-intrinsic-size-009.html

wpt / css / css-sizing / contain-intrinsic-size / contain-intrinsic-size-009.html

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

Subtest	Status	Message
.test 1	FAIL	assert_equals: data-expected-client-width expected 55 got 0 assert_equals: data-expected-client-height expected 66 got 0
.test 2	FAIL	assert_equals: data-expected-client-width expected 55 got 0
.test 3	FAIL	assert_equals: data-expected-client-height expected 66 got 0
.test 4	FAIL	assert_equals: data-expected-client-width expected 55 got 0
.test 5	FAIL	assert_equals: data-expected-client-height expected 66 got 0
.test 6	FAIL	assert_equals: data-expected-client-width expected 55 got 0
.test 7	FAIL	assert_equals: data-expected-client-height expected 66 got 0

Enable JavaScript in test iframe

/css/css-sizing/contain-intrinsic-size/contain-intrinsic-size-009.html

<!doctype html>
<meta charset="utf-8">
<title>CSS contain-intrinsic-size: select multiple</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#intrinsic-size-override">
<meta name="assert" content="contain-intrinsic-size sizes select multiple">

<style>
.cis-both {
  contain-intrinsic-size: 55px 66px;
}

.cis-width {
  contain-intrinsic-size: 55px none;
}

.cis-height {
  contain-intrinsic-size: none 66px;
}

select {
  padding: 0;
}

.test {
  contain: size;
  background: lightblue;
  border: 1px solid blue;
  margin: 5px;
}
</style>

<!-- To measure the size of an empty <select> without size containment -->
<select id="reference" multiple size="2"></select>

<select multiple class="test cis-both"
data-expected-client-width="55" data-expected-client-height="66"></select>
<select multiple class="test cis-width"
data-expected-client-width="55"></select>
<select multiple class="test cis-height"
data-expected-client-height="66"></select>

<select multiple size="2" class="test cis-width"
data-expected-client-width="55"></select>
<select multiple size="2" class="test cis-height"
data-expected-client-height="66"></select>

<select multiple size="10" class="test cis-width"
data-expected-client-width="55"></select>
<select multiple size="10" class="test cis-height"
data-expected-client-height="66"></select>

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script>
const reference = document.getElementById("reference");
const normalWidth = reference.clientWidth;
for (let test of document.querySelectorAll(".test.cis-width")) {
  reference.size = test.size || 4;
  test.dataset.expectedClientHeight = reference.clientHeight;
}
for (let test of document.querySelectorAll(".test.cis-height")) {
  test.dataset.expectedClientWidth = normalWidth;
 }

checkLayout('.test');
</script>