css/css-contain/contain-paint-050.html

<!DOCTYPE html>
<html class="reftest-wait">
<title>CSS Containment Test: Scrolling overflow works when paint is contained"</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-paint">
<link rel="match" href="contain-paint-050-ref.html">
<meta name="assert" content="Scrolling overflow works when paint is contained.">

<script src="/common/reftest-wait.js"></script>
<script src="/common/rendering-utils.js"></script>

<style>
body {
  contain: paint;
}
.content {
  height: 100vh;
  width: 100%;
}
</style>

<body>
  <div class="content"></div>

<script>
waitForAtLeastOneFrame().then(() => {
  document.body.scrollTop = 100;
  takeScreenshot();
});
</script>

</body>
</html>