html

<div id="div-01">Here is div-01</div>
<div id="div-02">Here is div-02</div>
<li>This is a list item</li>
<li>This is another list item</li>
<div id="div-03">Here is div-03</div>

<script>
  let el = document.getElementById("div-03").previousElementSibling;
  document.write("<p>Siblings of div-03</p><ol>");
  while (el) {
    document.write("<li>" + el.nodeName + "</li>");
    el = el.previousElementSibling;
  }
  document.write("</ol>");
</script>