htmz URL history support + innerHTML

htmz.html

<script>
  function htmz(frame) {
    // ----------------------------------------------------------------------
    // History + innerHTML
    // ----------------------------------------------------------------------

    setTimeout(() => {
      const el = document .querySelector(frame.contentWindow.location.hash || null)
      el.innerHTML = frame.contentDocument.body.innerHTML;

      const urlWithoutFragment = new URL(frame.contentWindow.location.href);
      urlWithoutFragment.hash = ""; // Remove the fragment
      history.replaceState(null, "", urlWithoutFragment.href);
    });
  }
</script>
<iframe hidden="" name="htmz" onload="window.htmz(this)"></iframe>
<a href="flower.html#my-element" target=htmz>Flower</a>
<a href="rock.html#my-element" target=htmz>Rock</a>

<div id="my-element"></div>