public/index.html

@@ -53,7 +53,7 @@
 </footer>
 
 <script crossorigin="anonymous" referrerpolicy="no-referrer"
-        src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.0.1/socket.io.js"></script>
+        src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.1.2/socket.io.js"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/pixi.js/6.0.2/browser/pixi.js"></script>
 <script src="js/Card.js"></script>
 <script src="js/Button.js"></script>

public/js/chat.js

@@ -2,7 +2,9 @@ let socket;
 let connected = false;
 
 function start_chat() {
-    socket = io();
+    socket = io("/", {
+        closeOnBeforeunload: false
+    });
 
     socket.on('login', function () {
         connected = true;