chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/old-content-captures-opacity-ref.html

<!DOCTYPE html>
<title>View transitions: capture opacity elements (ref)</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:[email protected]">
<style>
.box {
  color: red;
  background: lightblue;
  width: 100px;
  height: 100px;
  contain: paint;
  position: absolute;
  font-size: 30pt;
  will-change: opacity;
}
#e1 { opacity: 0.75; top: 20px; left: 20px; }
#e2 { opacity: 0.5; top: 160px; left: 20px; }
#e3 { opacity: 0.25; top: 300px; left: 20px; }
body { background: lightpink; }
</style>
<div id=e1 class=box>one</div>
<div id=e2 class=box>two</div>
<div id=e3 class=box>three</div>