wpt / css / css-sizing / aspect-ratio / replaced-element-042.html

Status: FAIL | Duration: 2ms | Subtests: 0/4 | Open test on wpt.live | wpt.fyi

TestTest SourceSubtests (0/4)

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

SubtestStatusMessage
canvas 1FAILassert_equals: data-expected-width expected 50 got 20 assert_equals: data-expected-height expected 50 got 70
canvas 2FAILassert_equals: data-expected-width expected 50 got 70 assert_equals: data-expected-height expected 50 got 20
canvas 3FAILassert_equals: data-expected-width expected 175 got 150 assert_equals: data-expected-height expected 175 got 100
canvas 4FAILassert_equals: data-expected-width expected 175 got 100 assert_equals: data-expected-height expected 175 got 150

/css/css-sizing/aspect-ratio/replaced-element-042.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS aspect-ratio: replaced element with box-sizing</title>
<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#aspect-ratio">
<link rel="help" href="https://drafts.csswg.org/css2/visudet.html#min-max-widths">
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">

<style>
canvas {
  box-sizing: border-box;
  aspect-ratio: 1;
  width: auto;
  height: auto;
  background: black;
}
</style>

<div id="log"></div>

<!--
From https://drafts.csswg.org/css2/visudet.html#min-max-widths

> for replaced elements with an intrinsic ratio and both `width` and `height` specified as `auto`,
> the algorithm is as follows:
>
> Select from the table the resolved height and width values for the appropriate constraint violation.
> Take the max-width and max-height as max(min, max) so that min ≤ max holds true.
> In this table w and h stand for the results of the width and height computations
> ignoring the `min-width`, `min-height`, `max-width` and `max-height` properties.
> Normally these are the intrinsic width and height, but they may not be
> in the case of replaced elements with intrinsic ratios.

Note the testcases below ensure that w/h is 1 to match the provided `aspect-ratio`,
which didn't exist in CSS2.

Also note that `aspect-ratio: 1` refers to the border-box due to `box-sizing`,
so we need to perform all calculations using border-box sizes.
-->

<!--
w = 100 + 0 = 100
h = 50 + 50 = 100
max-width = 50
max-height = 70
Constraint Violation = "(w > max-width) and (h > max-height), where (max-width/w ≤ max-height/h)"
Resolved Width = max-width = 50
Resolved Height = max(min-height, max-width * h/w) = max(0, 50*100/100) = 50
-->
<canvas width="100" height="50" style="max-width: 50px; max-height: 70px; padding-top: 50px"
        data-expected-width="50" data-expected-height="50"></canvas>

<!--
w = 50 + 50 = 100
h = 100 + 0 = 100
max-width = 70
max-height = 50
Constraint Violation = "(w > max-width) and (h > max-height), where (max-width/w > max-height/h)"
Resolved Width = max(min-width, max-height * w/h) = max(0, 50*100/100) = 50
Resolved Height = max-height = 50
-->
<canvas width="50" height="100" style="max-width: 70px; max-height: 50px; padding-left: 50px"
        data-expected-width="50" data-expected-height="50"></canvas>

<!--
w = 50 + 50 = 100
h = 100 + 0 = 100
min-width = 150
min-height = 175
Constraint Violation = "(w < min-width) and (h < min-height), where (min-width/w ≤ min-height/h)"
Resolved Width = min(max-width, min-height * w/h) = min(∞, 175*100/100) = 175
Resolved Height = min-height = 175
-->
<canvas width="50" height="100" style="min-width: 150px; min-height: 175px; padding-left: 50px"
        data-expected-width="175" data-expected-height="175"></canvas>

<!--
w = 100 + 0 = 100
h = 50 + 50 = 100
min-width = 175
min-height = 150
Constraint Violation = "(w < min-width) and (h < min-height), where (min-width/w > min-height/h)"
Resolved Width = min-width = 175
Resolved Height = min(max-height, min-width * h/w) = min(∞, 175*100/100) = 175
-->
<canvas width="100" height="50" style="min-width: 175px; min-height: 150px; padding-top: 50px"
        data-expected-width="175" data-expected-height="175"></canvas>

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script>
checkLayout("canvas");
</script>