chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/scroller-child-abspos-ref.html

<!DOCTYPE html>
<title>View transitions: scroller child element (ref)</title>
<link rel="help" href="https://www.w3.org/TR/css-view-transitions-1/">
<link rel="author" href="mailto:[email protected]">

<style>
#target {
  width: 200px;
  height: 200px;
  background: yellow;
}
#scroller {
  overflow: scroll;
  width: 100px;
  height: 100px;
  background: blue;
  isolation: isolate;
}

#child {
  position: absolute;
  width: 100px;
  height: 100px;
  background: green;
  top: 200px;
}
</style>

<div id="target">
  <div id="scroller">
    <div id="child"></div>
  </div>
</div>

<script>
onload = () => { scroller.scrollTop = 300; };
</script>