Error: Port already in use:3000 in node.js using socket io and express

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#1

Hello everyone!
I was making a node.js application that includes express and socket.io.

The code I’m using is here-

const express=require('express');
const app=express();
const http=require('http').Server(app);
app.use(express.static('public'));

const io=require('socket.io')(http,{
  cors:{origin:'*'}
});

http.listen(3000,()=>{
  console.log('listening to port 3000');
});

//when connection made 
io.on('connection',(socket)=>{
  console.log('connection made!');
});

Here,public is a folder containing some html files
and I’m getting the error-

Error: listen EADDREINUSE: address already in use :::3000

Basically,a error saying the post 3000 is in use already. Now,as far as i know,port 3000 is available globally
And this code when tested on my pc locally works fine.

Any help regarding this will greatly be appreciated!

#2

Glitch serves projects at port 3000, which might be conflicting with the socket’s port.