diff --git a/problems/0541.反转字符串II.md b/problems/0541.反转字符串II.md
index 0a92ac8b..7f3ff253 100644
--- a/problems/0541.反转字符串II.md
+++ b/problems/0541.反转字符串II.md
@@ -138,6 +138,26 @@ Python：
 
 Go：
 
+javaScript: 
+
+```js
+
+/**
+ * @param {string} s
+ * @param {number} k
+ * @return {string}
+ */
+var reverseStr = function(s, k) {
+    const len = s.length;
+    let resArr = s.split(""); 
+    for(let i = 0; i < len; i += 2 * k) {
+        let l = i - 1, r = i + k > len ? len : i + k;
+        while(++l < --r) [resArr[l], resArr[r]] = [resArr[r], resArr[l]];
+    }
+    return resArr.join("");
+};
+
+```