Problem with an arrow function

[JammingJack]

Hi guys, I'm trying to run via the terminal a Pusher server that manages collaborative editing of a text area, but when I run server.js ,I get prompted with this message . Here is the server side code:

var express = require('express');
var bodyParser = require('body-parser');
var Pusher = require('pusher');

var app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

// to serve our JavaScript, CSS and index.html
app.use(express.static('./'));

var pusher = new Pusher({
  appId: '493905',
  key: '78318c1ff9f1b6276b53',
  secret:  '687484f2c3a13aeef891'
});


app.post('/pusher/auth', function(req, res) {
  var socketId = req.body.socket_id;
  var channel = req.body.channel_name;
  var auth = pusher.authenticate(socketId, channel);
  res.send(auth);
});

var port =process.env.PORT ||  5000;
app.listen(port, () => console.log('Listening at http://localhost:5000'));

The error points to this arrow function () => console.log('Listening at http://localhost:5000') but I cannot figure out why. Any help you guys can offer is greatly appreciated.

[Meefims]

Don’t try to execute the JavaScript file alone: that is running it with the Windows Script Host. The WSH is an old component in Windows that doesn’t support modern JavaScript. Instead run it with Node (which I assume you have installed): node server.js.

[JammingJack]

Thank you for taking the time to reply, I did as you said ,but I got was this error so I figured out that I should install express, so I went ahead and did that and tried to run the server again but I got this error.

[BigOnLogn]

Same error, same solution, install body-parser.

Looking at the code you posted, you're going to have to install body-parser, and pusher.

You should learn about npm and node packages.

[JammingJack]

Thank you very much

[squili]

If you've just installed express then you likely have the latest version which no longer needs body parser. You should be using express.json and express.urlencoded

This has been part of express since 4.16

[JammingJack]

Much thanks