I installed express globally and npm installed my express app, yet neither the intellisence or the app is working ( I am using visual studio code on mac OS Yosemite).

here is a sample code:

/// <reference path=typings/node/node.d.ts />

/// <reference path=typings/express/express.d.ts />



var express = require('express');

var app = express.createServer();

app.get('/', function (req, res) {

    res.send('hi');

})



app.listen(8000);

and here are the errors I am getting:

Abeds-MacBook-Pro:myNode AZ$ node twitter.js 

/Users/AZ/Desktop/myNode/twitter.js:5

var app = express.createServer();

                  ^



TypeError: express.createServer is not a function

    at Object.<anonymous> (/Users/AZ/Desktop/myNode/twitter.js:5:19)

    at Module._compile (module.js:397:26)

    at Object.Module._extensions..js (module.js:404:10)

    at Module.load (module.js:343:32)

    at Function.Module._load (module.js:300:12)

    at Function.Module.runMain (module.js:429:10)

    at startup (node.js:139:18)

    at node.js:999:3

I researched a bit and found that createServer() has been deprecated. I read that I need to change the version somewhere in my application.

Note: I did another application using purely Node.js, and createServer() did work without any error along with the intellisence.

EDIT:
in my other application I used require('net') instead.

I modified my code to the following:

var express = require('express')

  , http = require('http');



    var app = express(); 

    var server = http.createServer(app);

    console.log('Listening on port 8000')

    app.get('/', function (req, res) {

        res.send('hi');

    })



    app.listen(8000)

The problem I have now is that res.send('hi'); has not been reached, aka, I cannot send to the client.

EDIT 2:

I tried the following code provided in one of the answers:

const express = require('express');

const http = require('http');



const app = express();

const server = http.createServer(app).listen(8080, function(err) {

  if (err) {

    console.log(err);

  } else {

    const host = server.address().address;

    const port = server.address().port;

    console.log(`Server listening on ${host}:${port}`);

  }

});

app.get('/', function (req, res) {

    res.send('hi');

})

res.send('hi'); still does not work, neither does it provide an error.