chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/css-tags-paint-order-ref.html

<!DOCTYPE html>
<title>View transitions: css tags generate pseudo elements in paint order (ref)</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:[email protected]">

<style>
div {
  position: absolute;
  top: 50px;
  width: 100px;
  height: 100px;
}
#one {
  background: green;
  left: 50px;
  z-index: 1;
}
#two {
  background: yellow;
  left: 125px;
  z-index: -1;
}
#three {
  background: blue;
  left: 200px;
  z-index: 0;
}
body { background: lightpink; }
</style>

<div id=one></div>
<div id=two></div>
<div id=three></div>