aspect-ratio-affects-container-width-when-height-changes.html

<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:[email protected]">
<link rel="help" href="https://www.w3.org/TR/css-sizing-3/#intrinsic-sizes">
<p>There should be a green square below, and no red.</p>
<div id="container" style="height:200px;">
  <div style="height:100%;" data-expected-height="100">
    <div style="float:left; height:100%; background:red;" data-expected-width="100" data-expected-height="100">
      <!-- The image is a 1x1 transparent one. -->
      <img style="display:block; height:100%; background:green;" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-expected-width="100" data-expected-height="100">
    </div>
  </div>
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script>
  test(()=> {
      document.body.offsetTop;
      document.getElementById("container").style.height = "100px";
      checkLayout("#container");
  }, "Changing height should affect the descendant widths, due to aspect ratio");
</script>

chromium/third_party/blink/web_tests/external/wpt/css/css-sizing/aspect-ratio-affects-container-width-when-height-changes.html