node.js express createServer() not a function

Question

I'm trying to build an express project. After I npm install, create server.js and node server.js, I got this error:

var app = module.exports = express.createServer();                                ^ TypeError: undefined is not a function  at Object.<anonymous> (/Users/zez/Desktop/node/nodeblog/server.js:3:36) at Module._compile (module.js:449:26) at Object.Module._extensions..js (module.js:467:10) at Module.load (module.js:349:32) at Function.Module._load (module.js:305:12) at Function.Module.runMain (module.js:490:10) at startup (node.js:124:16) at node.js:807:3 

and here is my code in server.js:

var express = require('express'); var app = module.exports = express.createServer();                                    app.configure(function(){ app.set('views', __dirname + '/views');     app.set('view engine', 'jade');     app.use(express.bodyParser());     app.use(express.methodOverride());     app.use(app.router);     app.use(express.static(__dirname + '/public')); });   app.get('/', function(req, res){     res.render('index', {             title: 'Express'                 }); });  app.listen(3000); 

Answer 1

Change:

var express = require('express'); var app = module.exports = express.createServer();   

To:

var express = require('express'); var app = express(); //Middleware app.listen(3000) 

You can also globally install express with the following command and then automatically generate a express template with the following command:

npm install -g express 

Generate template:

express myAppName cd . && npm install 

Answer 2

express.createServer() has been deprecated, perhaps your project's package.json is pointing at the latest version? Try pinning it to 2.5.10 and npm install again. Or check Nodejs / Express - Launching my app: express.createServer() is deprecated on how to update the project to work with more recent versions of express.