diff --git a/valid-anagram/jthw1005.js b/valid-anagram/jthw1005.js
new file mode 100644
index 0000000000..3ba2b4a480
--- /dev/null
+++ b/valid-anagram/jthw1005.js
@@ -0,0 +1,14 @@
+const isAnagram = (s, t) => {
+  const data = new Array(26).fill(0);
+  const a_ascii = 'a'.charCodeAt();
+
+  for (const char of s) {
+    data[char.charCodeAt() - a_ascii]++;
+  }
+
+  for (const char of t) {
+    data[char.charCodeAt() - a_ascii]--;
+  }
+
+  return !data.some((el) => el !== 0);
+};