position-visibility-no-overflow-ref.html

<!DOCTYPE html>
<meta charset="utf-8">
<style>
  #scroll-container {
    overflow: hidden scroll;
    width: 400px;
    height: 100px;
  }

  .anchor {
    width: 100px;
    height: 100px;
    background: orange;
    display: inline-block;
  }
</style>

<div id="scroll-container">
  <div class="anchor">anchor1</div>
  <div style="height: 100px"></div>
</div>

chromium/third_party/blink/web_tests/external/wpt/css/css-anchor-position/position-visibility-no-overflow-ref.html