skypesky#leetcode-for-javascript#589. N叉树的前序遍历1

# [589. N叉树的前序遍历](https://leetcode-cn.com/problems/n-ary-tree-preorder-traversal/) - 栈 ```javascript /** * // Definition for a Node. * function Node(val, children) { * this.val = va