chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/new-content-element-writing-modes-ref.html

<!DOCTYPE html>
<title>View transitions: shared element writing-modes (ref)</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:[email protected]">

<style>
.tb { writing-mode: horizontal-tb; }
.lr { writing-mode: vertical-lr; }
.rl { writing-mode: vertical-rl; }
.shared {
  margin: 2px;
  width: 100px;
  height: 50px;
  background: green;
  contain: paint;
  border: 1px solid black;
}
html { background: lightpink; }
</style>

<div id=one class="tb shared">T</div>
<div id=two class="lr shared">T</div>
<div id=three class="rl shared">T</div>