memory leaks

Connection.js

@@ -0,0 +1,21 @@
+const socketIO = require('socket.io');
+
+const io = (server) => {
+    return socketIO(server, {
+        cors: {
+            origin: "http://localhost:3000"
+        }
+    });
+}
+
+const connection = (io) => {
+    io.on('connection', (socket) => {
+        console.log(`User ${socket.id} connected`);
+
+        socket.on('disconnect', () => {
+            console.log(`User ${socket.id} disconnected`)
+        })
+    })
+}
+
+module.exports = { io, connection }

client/src/App.jsx

@@ -1,19 +1,23 @@
 import { useState, useEffect } from 'react'
 import logo from './logo.svg'
-import { io } from 'socket.io-client'
+import io from 'socket.io-client'
 // import './App.css'
 
 function App() {
+  const [socket, setSocket] = useState();
+
   useEffect(() => {
-    const socket = io('ws://localhost:8000');
+    const newSocket = io("http://localhost:8000");
+    setSocket(newSocket);
 
-    socket.on('connect', ()=>console.log(socket.id))
-    socket.on('connect_error', ()=>{
-      setTimeout(()=>socket.connect(),5000)
+    return () => newSocket.close();
+  }, [setSocket]);
+
+  useEffect(() => {
+    socket.on('connection', () => {
+      console.log(socket.id);
     })
-
-    return () => socket.close();
-  }, []);
+  }, [socket]);
 
   return (
     <div className="App">

index.js

@@ -1,29 +1,23 @@
 const express = require('express');
-const app = express();
 const cors = require('cors');
-
-app.use(cors());
-
 const http = require('http');
+
+const { io, connection } = require("./Connection");
+
+const app = express();
+app.use(cors());
 const server = http.createServer(app);
 
-const socketIO = require('socket.io');
+const socketIOMiddleware = (req, res, next) => {
+    req.io = io;
+    next();
+}
 
-const io = socketIO(server, {
-    cors: {
-        origin: 'http://localhost:3000'
-    }
-});
-
-io.on('connection', (socket) => {
-    console.log('client connected: ' + socket.id);
-});
-
-app.use('/', (req, res) => {
-    
+server.use('/', (req, res) => {
+    res.send(connection(io(server)));
 })
 
-app.listen(8000, (err) => {
+server.listen(8000, (err) => {
     if (err) console.log(err);
     console.log("Listening on 8000");
 })