添加0106.从中序与后序遍历序列构造二叉树 JavaScript版

problems/0106.从中序与后序遍历序列构造二叉树.md

@@ -623,7 +623,21 @@ Python：
 Go：
 
 
+JavaScript
+```javascript
+var buildTree = function(inorder, postorder) {
+    if (!postorder.length) return null
     
+    let root = new TreeNode(postorder[postorder.length - 1])
+    
+    let index = inorder.findIndex(number => number === root.val)
+    
+    root.left = buildTree(inorder.slice(0, index), postorder.slice(0, index))
+    root.right = buildTree(inorder.slice(index + 1, inorder.length), postorder.slice(index, postorder.length - 1))
+    
+    return root
+};
+```
 
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 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)