<!doctype html>
<html>
<head>
<meta charset="utf-8">
<script>
document.addEventListener("DOMContentLoaded", () => {
  document.onselectionchange = () => {
    document.execCommand("insertHTML", false, "a")
    document.designMode = "on"
  };
  window.find("a");
  document.querySelector("dl[contenteditable] > dd").addEventListener("DOMNodeRemoved", () => {
    document.querySelector("dl[contenteditable]").remove();
  });
});
</script>
</head>
<body>
<dl contenteditable>
<dd></dd>
a
</dl>
</body>
</html>
