Blitz - WPT: intrinsic-size-fallback-replaced.html

wpt / css / css-sizing / intrinsic-size-fallback-replaced.html

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

Subtest	Status	Message
.test 1	PASS
.test 2	PASS
.test 3	FAIL	assert_equals: data-expected-bounding-client-rect-width expected 300 got 100 assert_equals: data-expected-bounding-client-rect-height expected 150 got 100
.test 4	FAIL	assert_equals: data-expected-width expected 300 got 100 assert_equals: data-expected-height expected 150 got 100
.test 5	PASS
.test 6	PASS
.test 7	FAIL	assert_equals: data-expected-bounding-client-rect-width expected 300 got 100 assert_equals: data-expected-bounding-client-rect-height expected 150 got 100
.test 8	FAIL	assert_equals: data-expected-width expected 300 got 100 assert_equals: data-expected-height expected 150 got 100

Enable JavaScript in test iframe

/css/css-sizing/intrinsic-size-fallback-replaced.html

<!DOCTYPE html>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html>
<meta charset="utf-8">
<title>CSS Sizing Test: Testing intrinsic size fallback 300x150 for some replaced elements.</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<link rel="help" href="https://drafts.csswg.org/css-sizing-3/#intrinsic">
<meta name="assert"
  content="This test verifies that the intrinsic size fallback is 300px width and 150px height for replaced elements with no intrinsic size and no intrinsic ratio, regardless of the writing-mode.">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>

<style>
  .test {
    border: 0;
    padding: 0;
    background-color: blue;
  }

  .vertical {
    writing-mode: vertical-rl;
  }
</style>

<body onload="checkLayout('.test')">
  <!-- horizontal writing-mode -->
  <iframe class="test" data-expected-width="300" data-expected-height="150"></iframe>
  <video class="test" data-expected-width="300" data-expected-height="150"></video>
  <svg class="test" data-expected-bounding-client-rect-width="300"
    data-expected-bounding-client-rect-height="150"></svg>
  <img src="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg'></svg>" class="test" data-expected-width="300"
    data-expected-height="150">

  <!-- vertical writing-mode -->
  <iframe class="test vertical" data-expected-width="300" data-expected-height="150"></iframe>
  <video class="test vertical" data-expected-width="300" data-expected-height="150"></video>
  <svg class="test vertical" data-expected-bounding-client-rect-width="300"
    data-expected-bounding-client-rect-height="150"></svg>
  <img src="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg'></svg>" class="test vertical"
    data-expected-width="300" data-expected-height="150">
</body>

</html>