From 75ef824eb6025cf9555ecdea0fa653f0ec88b7cb Mon Sep 17 00:00:00 2001
From: kok-s0s <2694308562@qq.com>
Date: Mon, 21 Jun 2021 15:49:05 +0800
Subject: [PATCH] =?UTF-8?q?JavaScript=E7=89=88=E6=9C=AC=E7=9A=84=E3=80=8A?=
 =?UTF-8?q?=E4=BA=8C=E5=8F=89=E6=90=9C=E7=B4=A2=E6=A0=91=E4=B8=AD=E7=9A=84?=
 =?UTF-8?q?=E6=90=9C=E7=B4=A2=E3=80=8B?=
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---
 problems/0700.二叉搜索树中的搜索.md | 57 ++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/problems/0700.二叉搜索树中的搜索.md b/problems/0700.二叉搜索树中的搜索.md
index 16b21f26..d6899ac5 100644
--- a/problems/0700.二叉搜索树中的搜索.md
+++ b/problems/0700.二叉搜索树中的搜索.md
@@ -290,7 +290,64 @@ func searchBST(root *TreeNode, val int) *TreeNode {
 }
 ```
 
+JavaScript版本
 
+> 递归
+
+```javascript
+/**
+ * Definition for a binary tree node.
+ * function TreeNode(val, left, right) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.left = (left===undefined ? null : left)
+ *     this.right = (right===undefined ? null : right)
+ * }
+ */
+/**
+ * @param {TreeNode} root
+ * @param {number} val
+ * @return {TreeNode}
+ */
+var searchBST = function (root, val) {
+    if (!root || root.val === val) {
+        return root;
+    }
+    if (root.val > val)
+        return searchBST(root.left, val);
+    if (root.val < val)
+        return searchBST(root.right, val);
+    return null;
+};
+``` 
+
+> 迭代
+
+```javascript
+/**
+ * Definition for a binary tree node.
+ * function TreeNode(val, left, right) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.left = (left===undefined ? null : left)
+ *     this.right = (right===undefined ? null : right)
+ * }
+ */
+/**
+ * @param {TreeNode} root
+ * @param {number} val
+ * @return {TreeNode}
+ */
+var searchBST = function (root, val) {
+    while (root !== null) {
+        if (root.val > val)
+            root = root.left;
+        else if (root.val < val)
+            root = root.right;
+        else 
+            return root;
+    }
+    return root;
+};
+```