app.set('port', port) 'TypeError: undefined is not a function'. Beginner, need ideas

Question

I\'m an amateur learning to build with node.js. I\'ve been following a tutorial to create my first node.js app. It worked perfectly until I entered \'npm start\'. The log is:

Answer 1

At the bottom of your app.js:

app.set('port', process.env.PORT || 26398); //<--- replace with your port number

// Server
var server = http.createServer(app);
server.listen(app.get('port'), function(){
    console.log('Express server listening on port ' + app.get('port'));
});

module.exports = app;