diff --git a/problems/二叉树的递归遍历.md b/problems/二叉树的递归遍历.md
index 2d571294..e5279ec0 100644
--- a/problems/二叉树的递归遍历.md
+++ b/problems/二叉树的递归遍历.md
@@ -306,6 +306,59 @@ var postorderTraversal = function(root, res = []) {
     return res;
 };
 ```
+Javascript版本：
+
+前序遍历：
+```Javascript
+var preorderTraversal = function(root) {
+ let res=[];
+ const dfs=function(root){
+     if(root===null)return ;
+     //先序遍历所以从父节点开始
+     res.push(root.val);
+     //递归左子树
+     dfs(root.left);
+     //递归右子树
+     dfs(root.right);
+ }
+ //只使用一个参数 使用闭包进行存储结果
+ dfs(root);
+ return res;
+};
+```
+中序遍历
+```javascript
+var inorderTraversal = function(root) {
+    let res=[];
+    const dfs=function(root){
+        if(root===null){
+            return ;
+        }
+        dfs(root.left);
+        res.push(root.val);
+        dfs(root.right);
+    }
+    dfs(root);
+    return res;
+};
+```
+
+后序遍历
+```javascript
+var postorderTraversal = function(root) {
+    let res=[];
+    const dfs=function(root){
+        if(root===null){
+            return ;
+        }
+        dfs(root.left);
+        dfs(root.right);
+        res.push(root.val);
+    }
+    dfs(root);
+    return res;
+};
+```