nodejs - can't find module Backbone - node.js

Question

var Backbone = require('backbone');
causes this error:
module.js:340
throw err;
^
Error: Cannot find module 'backbone'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object.<anonymous> (C:\Users\denman\workspace-nodejs\AFirstServer_NodeUpAndRunning\hello-world-server.js:6:16)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
how can this be?
I installed Backbone via npm install -g backbone
I even restarted Eclipse and my machine.

Answer 1

By default, node will not load modules that are installed globally. You should be performing any npm install-s in your project's directory root, not installing them globally.
Try this instead. Create your new project directory, change to it, and then:
npm init #this will create a package.json for your project
npm install --save backbone # this will install backbone to the directory, and save it into your package.json as a dependency
Then create a file in that directory called index.js. Put your code in there requiring backbone. Then from within that directory run node index.js, and you'll find that everything works, and backbone is available.
Here is a good blog post on the subject.