frameset-dynamic-border.html | Explore in Territory

<!DOCTYPE html>
<html class="reftest-wait">
<script>
window.onload = () => {
  requestAnimationFrame(() => requestAnimationFrame(() => {
    document.body.setAttribute('border', '20');
    document.documentElement.removeAttribute('class');
  }));
};
</script>
<frameset border="6" rows="50%,*" cols="50%,*">
<frame></frame>
<frame></frame>
<frame></frame>
<frame></frame>
</frameset>
</html>

chromium/third_party/blink/web_tests/fast/frames/frameset-dynamic-border.html