Blitz - WPT: scrollable-containing-block-position-area.html

wpt / css / css-anchor-position / scrollable-containing-block-position-area.html

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

Subtest	Status	Message
.target 1	FAIL	assert_equals: data-offset-x expected 0 got 10 assert_equals: data-offset-y expected 0 got 190 assert_equals: data-expected-width expected 200 got 0 assert_equals: data-expected-height expected 70 got 0
.target 2	FAIL	assert_equals: data-offset-x expected 120 got 10 assert_equals: data-offset-y expected 0 got 190 assert_equals: data-expected-width expected 80 got 0 assert_equals: data-expected-height expected 200 got 0
.target 3	FAIL	assert_equals: data-offset-x expected 0 got 10 assert_equals: data-offset-y expected 120 got 190 assert_equals: data-expected-width expected 200 got 0 assert_equals: data-expected-height expected 80 got 0
.target 4	FAIL	assert_equals: data-offset-x expected 0 got 10 assert_equals: data-offset-y expected 0 got 190 assert_equals: data-expected-width expected 70 got 0 assert_equals: data-expected-height expected 200 got 0

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/css/css-anchor-position/scrollable-containing-block-position-area.html

<!DOCTYPE html>
<title>Tests the scrollable containing-block usage with position-area.</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/">
<link rel="help" href="https://drafts.csswg.org/css-position-4/#scrollable-containing-block">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/12552">
<style>
.scroller {
  /* Use overflow hidden instead of scroll to mitigate scrollbar differences. */
  overflow: hidden;
  position: relative;
  width: 80px;
  height: 80px;
  margin: 10px;
  border: solid 3px;
  padding: 10px;
}

.filler {
  min-width: 180px;
  min-height: 180px;
}

.anchor {
  anchor-name: --a;
  width: 50px;
  height: 50px;
  position: relative;
  left: 60px;
  top: 60px;
  background: orange;
}

.target {
  position: absolute;
  position-anchor: --a;
  place-self: stretch;
  background: cyan;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<body onload="checkLayout('.target')">

<!-- top -->
<div class="scroller">
  <div class="filler"><div class="anchor"></div></div>
  <div class="target" style="position-area: top;" data-offset-x="0" data-offset-y="0" data-expected-width="200" data-expected-height="70"></div>
</div>

<!-- right -->
<div class="scroller">
  <div class="filler"><div class="anchor"></div></div>
  <div class="target" style="position-area: right;" data-offset-x="120" data-offset-y="0" data-expected-width="80" data-expected-height="200"></div>
</div>

<!-- bottom -->
<div class="scroller">
  <div class="filler"><div class="anchor"></div></div>
  <div class="target" style="position-area: bottom;" data-offset-x="0" data-offset-y="120" data-expected-width="200" data-expected-height="80"></div>
</div>

<!-- left -->
<div class="scroller">
  <div class="filler"><div class="anchor"></div></div>
  <div class="target" style="position-area: left;" data-offset-x="0" data-offset-y="0" data-expected-width="70" data-expected-height="200"></div>
</div>