Example of CommonJS modules

mymodule.js

var nextNumber = 0;
module.exports.getNumber = function() {
  nextNumber += 1;
  return nextNumber;
};

some_other.js

var mymodule = require('./mymodule');
// mymodule in this file is now the module.exports object from mymodule.js

mymodule.getNumber(); // returns 1
mymodule.getNumber(); // returns 2

// There is no way to read or affect the local variable nextNumber
// except through the getNumber function exposed by mymodule.

I think you mean myModule.getNumber();

Yeah, sorry; I mentioned this in IRC as well. Thanks for pointing it out.