first-letter-text-and-display-change.html

<!doctype html>
<title>CSS Test: Change display for the ::first-letter container while replacing text node</title>
<link rel="help" href="https://drafts.csswg.org/css-pseudo/#first-letter-pseudo">
<link rel="match" href="../reference/pass_if_letter_uppercase.html">
<style>
  #container::first-letter { text-transform: uppercase }
  #container.ib { display: inline-block }
</style>
<body>
  <p>Test passes if the letter "F" in the words "Filler Text" below is in upper-case.</p>
  <div id="container">Test not run</div>
</body>
<script>
  container.offsetTop;
  container.className = "ib";
  container.appendChild(document.createTextNode("filler Text"));
  container.firstChild.remove();
</script>

chromium/third_party/blink/web_tests/external/wpt/css/css-pseudo/first-letter-text-and-display-change.html