Element: previousElementSibling property

<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>

let el = document.getElementById("div-03").previousElementSibling;
console.log("Siblings of div-03:");
while (el) {
  console.log(el.nodeName);
  el = el.previousElementSibling;
}