root-element-transition-no-opt-in-ref.html

<!DOCTYPE html>
<title>View transitions: basic cross-document navigation (ref)</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/">
<link rel="author" href="mailto:[email protected]">
<style>
html {
  background: grey;
}
.hidden {
  width: 10px;
  height: 10px;
  view-transition-name: hidden;
  background: green;
  contain: layout;
}
</style>
<div class="hidden"></div>

chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/navigation/root-element-transition-no-opt-in-ref.html