<!doctype html>
<html>
<head>
<meta charset="utf-8">
<script>
document.addEventListener("DOMContentLoaded", () => {
  const text = document.createTextNode("abc");
  document.documentElement.appendChild(text);
  const range = new Range();
  range.selectNodeContents(text);
  document.documentElement.contentEditable = "true";
  document.execCommand("insertUnorderedList");
  getSelection().addRange(range);
  document.execCommand("insertHorizontalRule");
});
</script>
</head>
</html>
