Carlos Miguel Colanta Carlos Miguel Colanta - 9 months ago 23
Node.js Question

Why do some developer use 'http' and 'express' to create the server?

Particularly on this line of code:

I'm kinda new on node.js and most of the tutorials that I've seen initialize the server by

var http = require('http');
var express = require('express');

app = express();



wherein, if you're already using
then you can just do :

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

// omit



Are there any major difference between those two code structures?


No meaningful difference. In fact, if you look at the code for app.listen(), all it does is do http.createServer() and than call .listen() on it. It's just meant to be a shortcut that saves you using the http module directly.

Here's the code for app.listen():

app.listen = function listen() {
  var server = http.createServer(this);
  return server.listen.apply(server, arguments);

Your second code block is just a bit less code because it uses the app.listen() shortcut. Both do the same.