chromium/third_party/blink/web_tests/external/wpt/css/css-pseudo/first-letter-list-item-dynamic-001.html

<!doctype html>
<title>CSS Test: Move ::first-letter text node (required: list item, float, fixed, contenteditable).</title>
<link rel="match" href="first-letter-list-item-dynamic-001-ref.html">
<link rel="help" href="https://drafts.csswg.org/css-pseudo/#first-letter-pseudo">
<link rel="help" href="https://crbug.com/977044">
<style>
  #outer {
    display: list-item;
    overflow: auto; /* Triggers a crash in Blink see link to issue 977044 */
  }
  #outer::first-letter {
    float: left;
    color: green;
  }
  #fixed { position: fixed; }
  #inner { float: left; }
</style>
<p>The X below should be green.</p>
<div id="outer" contenteditable="true">X<div id="fixed"></div><div id="inner"></div></div>
<script>
  document.body.offsetTop;
  inner.appendChild(outer.removeChild(outer.firstChild));
  inner.removeAttribute("id");
</script>