diff --git a/solution/1900-1999/1957.Delete Characters to Make Fancy String/README.md b/solution/1900-1999/1957.Delete Characters to Make Fancy String/README.md
index 5811b0e2fbf46..fbfab3d1aea3c 100644
--- a/solution/1900-1999/1957.Delete Characters to Make Fancy String/README.md	
+++ b/solution/1900-1999/1957.Delete Characters to Make Fancy String/README.md	
@@ -145,14 +145,27 @@ func makeFancyString(s string) string {
 
 ```ts
 function makeFancyString(s: string): string {
-    const ans: string[] = [];
-    for (const c of s) {
-        const n = ans.length;
-        if (n < 2 || c !== ans[n - 1] || c !== ans[n - 2]) {
-            ans.push(c);
+    let [n, ans] = [s.length, ''];
+    for (let i = 0; i < n; i++) {
+        if (s[i] !== s[i - 1] || s[i] !== s[i - 2]) {
+            ans += s[i];
         }
     }
-    return ans.join('');
+    return ans;
+}
+```
+
+#### JavaScript
+
+```js
+function makeFancyString(s) {
+    let [n, ans] = [s.length, ''];
+    for (let i = 0; i < n; i++) {
+        if (s[i] !== s[i - 1] || s[i] !== s[i - 2]) {
+            ans += s[i];
+        }
+    }
+    return ans;
 }
 ```
 
diff --git a/solution/1900-1999/1957.Delete Characters to Make Fancy String/README_EN.md b/solution/1900-1999/1957.Delete Characters to Make Fancy String/README_EN.md
index 074212e7ac5ec..466d7474105a2 100644
--- a/solution/1900-1999/1957.Delete Characters to Make Fancy String/README_EN.md	
+++ b/solution/1900-1999/1957.Delete Characters to Make Fancy String/README_EN.md	
@@ -143,14 +143,27 @@ func makeFancyString(s string) string {
 
 ```ts
 function makeFancyString(s: string): string {
-    const ans: string[] = [];
-    for (const c of s) {
-        const n = ans.length;
-        if (n < 2 || c !== ans[n - 1] || c !== ans[n - 2]) {
-            ans.push(c);
+    let [n, ans] = [s.length, ''];
+    for (let i = 0; i < n; i++) {
+        if (s[i] !== s[i - 1] || s[i] !== s[i - 2]) {
+            ans += s[i];
         }
     }
-    return ans.join('');
+    return ans;
+}
+```
+
+#### JavaScript
+
+```js
+function makeFancyString(s) {
+    let [n, ans] = [s.length, ''];
+    for (let i = 0; i < n; i++) {
+        if (s[i] !== s[i - 1] || s[i] !== s[i - 2]) {
+            ans += s[i];
+        }
+    }
+    return ans;
 }
 ```
 
diff --git a/solution/1900-1999/1957.Delete Characters to Make Fancy String/Solution.js b/solution/1900-1999/1957.Delete Characters to Make Fancy String/Solution.js
new file mode 100644
index 0000000000000..16bfe1a2a7c98
--- /dev/null
+++ b/solution/1900-1999/1957.Delete Characters to Make Fancy String/Solution.js	
@@ -0,0 +1,9 @@
+function makeFancyString(s) {
+    let [n, ans] = [s.length, ''];
+    for (let i = 0; i < n; i++) {
+        if (s[i] !== s[i - 1] || s[i] !== s[i - 2]) {
+            ans += s[i];
+        }
+    }
+    return ans;
+}
diff --git a/solution/1900-1999/1957.Delete Characters to Make Fancy String/Solution.ts b/solution/1900-1999/1957.Delete Characters to Make Fancy String/Solution.ts
index 8a5edf3b949c9..6f86484842ea4 100644
--- a/solution/1900-1999/1957.Delete Characters to Make Fancy String/Solution.ts	
+++ b/solution/1900-1999/1957.Delete Characters to Make Fancy String/Solution.ts	
@@ -1,10 +1,9 @@
 function makeFancyString(s: string): string {
-    const ans: string[] = [];
-    for (const c of s) {
-        const n = ans.length;
-        if (n < 2 || c !== ans[n - 1] || c !== ans[n - 2]) {
-            ans.push(c);
+    let [n, ans] = [s.length, ''];
+    for (let i = 0; i < n; i++) {
+        if (s[i] !== s[i - 1] || s[i] !== s[i - 2]) {
+            ans += s[i];
         }
     }
-    return ans.join('');
+    return ans;
 }