Update index.html

index.html

@@ -144,17 +144,24 @@
         var messages = document.getElementById('chat-messages');
         let user = localStorage.getItem("userName")
         console.log(user)
-        if(user==null){
-            while(true){
-            
-            user = prompt('Create Your Username')
-            if(user!=null  && user!=''  && user!=undefined){
-                user.toUpperCase()
-              localStorage.setItem("userName",user.toUpperCase() )
-                break
+        if (user == null) {
+    while (true) {
+        user = prompt('Create Your Username');
+        if (user != null && user !== '' && user !== undefined) {
+            // Convert the username to uppercase for case-insensitive comparison
+            let upperCaseUser = user.toUpperCase();
+
+            // Check if the username contains "YASIR" in any form
+            if (!upperCaseUser.includes("YASIR")) {
+                localStorage.setItem("userName", upperCaseUser);
+                break;
+            } else {
+                alert("This name can't be taken. Please choose a different username.");
             }
         }
-        }
+    }
+}
+
         console.log(user)
         var userInput = document.getElementById('user-input');
         socket.on('user_count', function(data) {