express connected to react

index.js

@@ -1,23 +1,24 @@
 const express = require('express');
 const cors = require('cors');
 const http = require('http');
-
-const { io, connection } = require("./Connection");
+const socketIO = require("socket.io");
 
 const app = express();
 app.use(cors());
+
 const server = http.createServer(app);
-
-const socketIOMiddleware = (req, res, next) => {
-    req.io = io;
-    next();
-}
-
-server.use('/', (req, res) => {
-    res.send(connection(io(server)));
-})
+const io = socketIO(server, {
+    cors: {
+        origin: "http://localhost:3000"
+    }
+});
 
 server.listen(8000, (err) => {
     if (err) console.log(err);
     console.log("Listening on 8000");
-})
+    
+    io.on('connection', (socket) => {
+        console.log('new client connected.');
+        socket.emit('connection', 'data');
+    });
+})