Module that works directly in browser and node.js

index.js

// Check whether we are in browser or node.js
var _self = (typeof window !== 'undefined') ? window : {};

// Scoping with anonymous closure for browser
var Foo = (function(){
  var _ = _self.Foo = {
    init: function() {
    }
  }
  
  if (!_self.document) {
    return _self.Foo; // in node.js
  }
  
  document.addEventListener('DOMContentLoaded', _.init);
  return _self.Foo; // in browser
})();

// Export if we are required as a module
if (typeof module !== 'undefined' && module.exports) {
  module.exports = Coda;
}