Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/external/wpt/html/semantics/forms/the-selectlist-element/selectlist-font-size-ref.tentative.html 

<!DOCTYPE html>
<script src="support/fake-selectlist.js"></script>
<body>
<script>
  const selectlist = createFakeSelectlist('option');
  document.body.appendChild(selectlist);
  selectlist.style.fontSize = "48px";
</script>