css/css-masking/clip-path/clip-path-fixed-scroll.html

<!doctype html>
<html class="reftest-wait">
<title>CSS Test: clip-path above  position: fixed scrolled</title>
<link rel="help" href="https://crbug.com/1267676">
<link rel="help" href="https://drafts.fxtf.org/css-masking/#the-clip-path">
<link rel="match" href="clip-path-fixed-scroll-ref.html">
<script src="/common/rendering-utils.js"></script>
<script src="/common/reftest-wait.js"></script>
<div style="height: 100vh"></div>
<div style="width: 200px; height: 200px; clip-path: inset(0 0 0 0)">
  <div style="position: fixed; top: 0; left: 0; width: 2000px; height: 2000px; background: green"></div>
</div>
<script>
waitForAtLeastOneFrame().then(() => {
  scrollTo(0, 1000);
  takeScreenshot();
});
</script>
</html>