<pre class="shiki github-dark shaku"><code>/** * @param {HTMLElement | null} tree * @return {number} */function getHeight(tree) { let maxN = 0; const helper = (tree,count) =&gt; { if(!tree) { return maxN } for(let child of tree.children) { helper(child, count + 1) } maxN = Math.max(maxN,count) return maxN } helper(tree,1) return maxN }</code></pre>

easy solution using dfs

Height of a tree is the maximum depth from root node. Empty root node have a height of 0. If given DOM tree, can you create a function to get the heig…