Blitz - WPT: position-absolute-scrollable-overflow-001.html

wpt / css / css-position / position-absolute-scrollable-overflow-001.html

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

Subtest	Status	Message
.containing-block 1	PASS
.containing-block 2	PASS
.containing-block 3	PASS
.containing-block 4	FAIL	assert_equals: data-expected-scroll-height expected 400 got 500
.containing-block 5	FAIL	assert_equals: data-expected-scroll-height expected 100 got 1000
.containing-block 6	FAIL	assert_equals: data-expected-scroll-height expected 100 got 1000
.containing-block 7	PASS
.containing-block 8	PASS
.containing-block 9	PASS
.containing-block 10	PASS
.containing-block 11	FAIL	assert_equals: data-expected-scroll-width expected 400 got 500
.containing-block 12	FAIL	assert_equals: data-expected-scroll-width expected 100 got 1000
.containing-block 13	FAIL	assert_equals: data-expected-scroll-width expected 100 got 1000
.containing-block 14	PASS

Enable JavaScript in test iframe

/css/css-position/position-absolute-scrollable-overflow-001.html

<!DOCTYPE html>
<meta charset=utf-8>
<title>CSS Positioned Layout Test: Absolute positioned elements are included in the scrollable overflow area</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-position/#valdef-position-absolute">
<link rel="help" href="https://drafts.csswg.org/css-overflow/#scrollable">
<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-element-scrollheight">
<meta name=assert content="Absolute positioned elements are included in the scrollable overflow area of its containing block.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<style>
.containing-block {
  position: relative;
  width: 100px;
  height: 100px;
  margin: 100px;
}

.abspos {
  position: absolute;
  background: rgba(0, 255, 0, 0.5);
  width: 10px;
  height: 10px;
  left: 0;
  top: 0;
}
</style>
<body onload="checkLayout('.containing-block');">
  <div id="log"></div>
  <div class="containing-block" data-expected-scroll-width="100" data-expected-scroll-height="500">
    <div class="abspos" style="left: -50px; height: 500px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="100" data-expected-scroll-height="550">
    <div class="abspos" style="left: -50px; height: 500px; top: 50px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="100" data-expected-scroll-height="700">
    <div class="abspos" style="left: -50px; height: 500px; top: 200px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="100" data-expected-scroll-height="400">
    <div class="abspos" style="left: -50px; height: 500px; top: -100px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="100" data-expected-scroll-height="100">
    <div class="abspos" style="left: -50px; height: 500px; top: -1000px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="100" data-expected-scroll-height="100">
    <div class="abspos" style="left: 50px; height: 500px; top: -1000px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="210" data-expected-scroll-height="700">
    <div class="abspos" style="left: 200px; height: 500px; top: 200px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="500" data-expected-scroll-height="100">
    <div class="abspos" style="width: 500px; top: -50px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="550" data-expected-scroll-height="100">
    <div class="abspos" style="width: 500px; left: 50px; top: -50px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="700" data-expected-scroll-height="100">
    <div class="abspos" style="width: 500px; left: 200px; top: -50px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="400" data-expected-scroll-height="100">
    <div class="abspos" style="width: 500px; left: -100px; top: -50px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="100" data-expected-scroll-height="100">
    <div class="abspos" style="width: 500px; left: -1000px; top: -50px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="100" data-expected-scroll-height="100">
    <div class="abspos" style="width: 500px; left: -1000px; top: 50px;"></div>
  </div>
  <div class="containing-block" data-expected-scroll-width="700" data-expected-scroll-height="210">
    <div class="abspos" style="width: 500px; left: 200px; top: 200px;"></div>
  </div>
</body>