connected users messaging

public/js/app.js

@@ -1,5 +1,5 @@
 const socket = io.connect('/');
-socket.on('news', function (data) {
+socket.on('users connected', function (data) {
     console.log(data);
-    socket.emit('my other event', { my: 'data' });
 });
+// socket.emit('my other event', { my: 'data' });

server.js

@@ -6,10 +6,13 @@ const socketserver = require('socket.io')(http);
 
 app.use(express.static('public'));
 
+let connectedUsers = 0;
 socketserver.on('connection', function (socket) {
-    socket.emit('news', { hello: 'world' });
-    socket.on('my other event', function (data) {
-        console.log(data);
+    connectedUsers++;
+    socketserver.emit('users connected', connectedUsers);
+    socket.on('disconnect', function() {
+        connectedUsers--;
+        socketserver.emit('users connected', connectedUsers);
     });
 });