Node.js CommonJS style require for the browser

gistfile1.coffee

require = (name) ->
  if Object.hasOwnProperty.call require.cache, name
    moduleExp = require.cache[name].module.exports
    exportObj = require.cache[name].exports
  else
    moduleObj = {}
    exportObj = {}

    require.modules[name].apply(this, [require, moduleObj, exportObj]);
    require.cache[name] or= {}
    require.cache[name].module = moduleObj
    moduleExp = require.cache[name].module.exports
    require.cache[name].exports = exportObj

  moduleExp or exportObj

require.modules = {}

require.cache = {}

require.resolve = (name, fn) ->
  require.modules[name] = fn

gistfile2.coffee

require.resolve 'a', (require, module, exports) -> module.exports = 5
require.resolve 'b', (require, module, exports) ->
  a = require 'a'
  module.exports = a * 2
  
b = require('b')
console.log b