diff --git a/solution/2700-2799/2707.Extra Characters in a String/README.md b/solution/2700-2799/2707.Extra Characters in a String/README.md
index b2cff7fea73de..825e7da5463e6 100644
--- a/solution/2700-2799/2707.Extra Characters in a String/README.md	
+++ b/solution/2700-2799/2707.Extra Characters in a String/README.md	
@@ -210,6 +210,30 @@ impl Solution {
 }
 ```
 
+#### JavaScript
+
+```js
+/**
+ * @param {string} s
+ * @param {string[]} dictionary
+ * @return {number}
+ */
+var minExtraChar = function (s, dictionary) {
+    const ss = new Set(dictionary);
+    const n = s.length;
+    const f = Array(n + 1).fill(0);
+    for (let i = 1; i <= n; ++i) {
+        f[i] = f[i - 1] + 1;
+        for (let j = 0; j < i; ++j) {
+            if (ss.has(s.slice(j, i))) {
+                f[i] = Math.min(f[i], f[j]);
+            }
+        }
+    }
+    return f[n];
+};
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git a/solution/2700-2799/2707.Extra Characters in a String/README_EN.md b/solution/2700-2799/2707.Extra Characters in a String/README_EN.md
index 13eb8c12b9d59..777bf14ca7383 100644
--- a/solution/2700-2799/2707.Extra Characters in a String/README_EN.md	
+++ b/solution/2700-2799/2707.Extra Characters in a String/README_EN.md	
@@ -211,6 +211,30 @@ impl Solution {
 }
 ```
 
+#### JavaScript
+
+```js
+/**
+ * @param {string} s
+ * @param {string[]} dictionary
+ * @return {number}
+ */
+var minExtraChar = function (s, dictionary) {
+    const ss = new Set(dictionary);
+    const n = s.length;
+    const f = Array(n + 1).fill(0);
+    for (let i = 1; i <= n; ++i) {
+        f[i] = f[i - 1] + 1;
+        for (let j = 0; j < i; ++j) {
+            if (ss.has(s.slice(j, i))) {
+                f[i] = Math.min(f[i], f[j]);
+            }
+        }
+    }
+    return f[n];
+};
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git a/solution/2700-2799/2707.Extra Characters in a String/Solution.js b/solution/2700-2799/2707.Extra Characters in a String/Solution.js
new file mode 100644
index 0000000000000..078d05aab4f5f
--- /dev/null
+++ b/solution/2700-2799/2707.Extra Characters in a String/Solution.js	
@@ -0,0 +1,19 @@
+/**
+ * @param {string} s
+ * @param {string[]} dictionary
+ * @return {number}
+ */
+var minExtraChar = function (s, dictionary) {
+    const ss = new Set(dictionary);
+    const n = s.length;
+    const f = Array(n + 1).fill(0);
+    for (let i = 1; i <= n; ++i) {
+        f[i] = f[i - 1] + 1;
+        for (let j = 0; j < i; ++j) {
+            if (ss.has(s.slice(j, i))) {
+                f[i] = Math.min(f[i], f[j]);
+            }
+        }
+    }
+    return f[n];
+};