chromium/third_party/blink/web_tests/external/wpt/css/css-position/sticky/position-sticky-hyperlink.html

<!DOCTYPE html>
<title>Sticky element with hyperlink should work</title>
<link rel="match" href="position-sticky-hyperlink-ref.html">
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos">
<meta name="assert" content="This test checks that sticky hyperlink works.">
<meta name="fuzzy" content="maxDifference=0-5; totalPixels=0-80">

<style>
body {
    margin: 0;
}

.scroller {
  overflow: scroll;
  width: 200px;
  height: 200px;
}

.sticky {
  position: sticky;
  top: 0;
  will-change: transform;
}

.spacer {
  height: 700px;
}
</style>

<script>
window.addEventListener('load', function() {
  document.querySelector('.scroller').scrollTop = 100;
});
</script>

<div>You should see a sticky link at the top of the scrollable area.</div>

<div class='scroller'>
  <a href='#' class='sticky'>Link</a>
  <div class='spacer'></div>
</div>