vertical-scroll-scrollable-content.html

<!DOCTYPE html>
<style>
  body, html {
    height: 100%;
    width: 100%;
  }
  #spacer {
    width: 1500px;
    height: 1500px;
    background-color: red;
  }
</style>
<body>
  <p>This page is scrollable.</p>
  <div id="spacer"></div>
</body>

chromium/third_party/blink/web_tests/external/wpt/feature-policy/experimental-features/resources/vertical-scroll-scrollable-content.html