From 8d5c4fbce2a37b0614235e772e436394b6431854 Mon Sep 17 00:00:00 2001
From: Your Full Name <60301807@udst.edu.qa>
Date: Sun, 15 Feb 2026 18:24:17 +0300
Subject: [PATCH] Add validation for addWord (empty, letters only, duplicate)

---
 script.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/script.js b/script.js
index 43cfa50..772f009 100644
--- a/script.js
+++ b/script.js
@@ -95,6 +95,22 @@ function addWord() {
     const input = document.getElementById('newWord');
     const word = input.value.trim().toUpperCase();
 
+    if (!word) {
+        alert("Word cannot be empty.");
+        return;
+    }
+
+    const lettersOnly = /^[A-Z]+$/;
+    if (!lettersOnly.test(word)) {
+        alert("Word must contain only letters A-Z.");
+        return;
+    }
+
+    if (wordBank.includes(word)) {
+        alert("Word already exists.");
+        return;
+    }
+
     wordBank.push(word);
     input.value = '';
     saveWordBank();