<pre class="shiki github-dark shaku"><code>/** * @param {HTMLElement} rootA * @param {HTMLElement} rootB - rootA and rootB are clone of each other * @param {HTMLElement} nodeA */// iterativelyconst findCorrespondingNode = (rootA, rootB, target) =&gt; { let cursor = target; const stack = [] while(cursor.parentNode) { const siblings = cursor.parentNode.childNodes; const index = [...siblings.keys()].find(key =&gt; siblings[key] === cursor); stack.push(index); cursor = cursor.parentNode; } return stack.reduce((acc, index) =&gt; acc.childNodes[index], rootB)}</code></pre>