Node.js/Express.js App Only Works on Port 3000

Question

I have a Node.js/Express.js app running on my server that only works on port 3000 and I\'m trying to figure out why. Here\'s what I\'ve found:

• Without specifyi

Answer 1

If you want to show something you're connected on 3000

var express = require('express')
var app = express()

app.get('/', function (req, res) {
  res.send('Hello World!')
})

app.listen(3000, function () {
  console.log('Example app listening on port 3000!')
})

I hope that will be helpful to you

Answer 2

If you are using Nodemon my guess is the PORT 3000 is set in the nodemonConfig. Check if that is the case.

Answer 3

In bin/www, there is a line:

var port = normalizePort(process.env.PORT || '3000');

Try to modify it.

Answer 4

Make sure you are running from that folder of your application, where you have the package.json.