chromium/third_party/blink/web_tests/external/wpt/css/css-cascade/revert-layer-014.html

<!DOCTYPE html>
<title>CSS Cascade Layers: 'revert-layer' in slotted context</title>
<link rel="help" href="https://drafts.csswg.org/css-cascade-5/#revert-layer">
<link rel="match" href="reference/ref-filled-green-100px-square.xht">

<style>
#target {
  width: 100px;
  height: 100px;
  background-color: revert-layer;
}
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="host"><div id="target"></div></div>

<script>
host.attachShadow({mode: 'open'}).innerHTML = `
<style>
@layer first {
    ::slotted(*) { background-color: green; }
}
@layer second {
    ::slotted(*) { background-color: revert-layer; }
}
</style>
<slot></slot>
`;
</script>