diff --git a/problems/0738.单调递增的数字.md b/problems/0738.单调递增的数字.md
index 5bddb234..41ca67be 100644
--- a/problems/0738.单调递增的数字.md
+++ b/problems/0738.单调递增的数字.md
@@ -163,7 +163,30 @@ class Solution:
 
 Go：
 
+Javascript:
+```Javascript
+var monotoneIncreasingDigits = function(n) {
+    n = n.toString()
+    n = n.split('').map(item => {
+        return +item
+    })
+    let flag = Infinity
+    for(let i = n.length - 1; i > 0; i--) {
+        if(n [i - 1] > n[i]) {
+            flag = i
+            n[i - 1] = n[i - 1] - 1
+            n[i] = 9
+        }
+    }
 
+    for(let i = flag; i < n.length; i++) {
+        n[i] = 9
+    }
+
+    n = n.join('')
+    return +n
+};
+```
 
 
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