(function(factory) {
  if (typeof define === 'function' && define['amd']) {
    if (typeof requirejs !== 'undefined') {
      // https://github.com/devote/HTML5-History-API/issues/73
      var rndKey = '[history' + (new Date()).getTime() + ']';
      var onError = requirejs['onError'];
      factory.toString = function() {
        return rndKey;
      };
      requirejs['onError'] = function(err) {         // <==== ERROR HERE
        if (err.message.indexOf(rndKey) === -1) {
          onError.call(requirejs, err);
        }
      };
    }
    define([], factory);
  }