javascript - My simple routing is not working and I can't figure out why -

i'm working through basic node tutorial , having difficulty getting routes.js file work.

it working earlier today. server node reading file. reason, though not utilizing it. code looks tutorial -- though teacher on pc , on mac (though can't see why matter).

before issue started occur, hooked database (file below) -- again, can't see why screw routes. when put code in server.js, can proper routing.

help me stackoverflow, you're hope! see "cannot /"

my routes.js file

var user = require('../models/user');  module.exports = function(app){   app.get('/', function(req, res){     res.send("hello world");   });    // app.get('/:username/:password', function(req, res){   //   var newuser = new user();   //   newuser.local.username = req.params.username;   //   newuser.local.password = req.params.password;   //   console.log(newuser.local.username + " " + newuser.local.password);   //   newuser.save(function(err){   //     if(err)   //       throw err;   //   });   //   res.send('success!')   // });  }; 

server.js

var express = require('express'); var app = express(); var port = process.env.port || 8080;  var cookieparser = require('cookie-parser'); var session = require('express-session'); var morgan = require('morgan'); var mongoose = require('mongoose');  //config database var configdb = require('./config/database.js'); mongoose.connect(configdb.url);  //middleware run during every interaction; app.use(morgan('dev')); //sets req.cookies app.use(cookieparser()); app.use(session({   //secret user session   secret: "ist0",   //if server goes down, user can remain logged on -- still save database   saveuninitialized: true,   //even if nothing has changed, resave   resave: true   }));  //routes  require('./app/routes/routes');  // app.use('/', function(req, res){ //   //send express function //   res.send("our first express program"); //   console.log(req.cookies); //   console.log("============"); //   console.log(req.session); // });  app.listen(port);  console.log('the magic happens on ' + port) 

my database.js file:

module.exports = {   'url': 'mongodb://localhost/meanboil' } 

you exporting function (one expects app argument):

module.exports = function(app) { ... } 

but you're importing function , don't call it:

require('./app/routes/routes'); 

instead, need call , pass app argument:

require('./app/routes/routes')(app);