Universal Module Definition Pattern (from https://github.com/tildeio/rsvp.js/blob/master/lib/rsvp.umd.js)

module-export-pattern.js

/* global define:true module:true window: true */
if (typeof define === 'function' && define.amd) {
  define(function() { return MYMODULE; });
} else if (typeof module !== 'undefined' && module.exports) {
  module.exports = MYMODULE;
} else if (typeof this !== 'undefined') {
  this['RSVP'] = MYMODULE;
}