Socket.io gives CORS error even if I allowed cors it on server

Question

My node server and client are running on different ports(3001,5347 respectively). On client I had used,

var socket = io(\'http://127.0.0.1:3001\');
         


        

Answer 1

Following code helped:

const PORT = process.env.PORT || 4000;
const app = express();
const server = app.listen(PORT, () => {
    console.log(`Server running on port ${PORT}`);
});
const io = socket(server);