<pre class="shiki github-dark shaku"><code>/** * @param {HTMLElement} rootA * @param {HTMLElement} rootB - rootA and rootB are clone of each other * @param {HTMLElement} nodeA */const findCorrespondingNode = (rootA, rootB, target) =&gt; { const stack = [[rootA, rootB]]; while(stack.length &gt; 0) { const [leftNode, rightNode] = stack.pop(); if (leftNode === target) return rightNode; for (let i = 0; i &lt; leftNode.children.length; i++) { stack.push([leftNode.children[i], rightNode.children[i]]); } }}</code></pre>