gistfile1.js

  (function () {
    var Foobar = function MyModule() { /* ... */ };
    
    
    var hasDefine = typeof define === 'function' && define.amd;
    var hasExport = typeof exports !== 'undefined';

    if (hasDefine) {
      define('Foobar', Foobar);
    }
    else if (hasExport) {
      exports = Foobar;
    }
    else {
      window.Foobar = Foobar;
    }
  }());