CharacterData.previousElementSibling

<div id="div-01">Here is div-01</div>
TEXT
<div id="div-02">Here is div-02</div>
SOME TEXT
<div id="div-03">Here is div-03</div>
<pre>Result</pre>

// Initially set node to the Text node with `SOME TEXT`
let node = document.getElementById('div-02').nextSibling;

let result = 'Previous element siblings of SOME TEXT:\n';

while (node) {
  result += node.nodeName + '\n';
  node = node.previousElementSibling;
}

document.getElementsByTagName('pre')[0].textContent = result;