css/css-conditional/container-queries/no-layout-containment-fixedpos.html

<!DOCTYPE html>
<title>Position fixed elements should propagate from a container-type subtree.</title>
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/10544#issuecomment-2248438355">
<link rel="match" href="/css/reference/ref-filled-green-100px-square-only.html">
<p>Test passes if there is a filled green square.</p>
<div style="contain: layout; width: 100px; height: 100px; background: red;">
  <div style="container-type: inline-size; height: 0;">
    <div style="position: fixed; inset: 0; background: green;"></div>
  </div>
</div>