AngularJs - get list of all registered directives

listDirectives.js

const listDirectivesApp = () => {
  const listDirectives = name => {
    return angular
      .module(name)
      ._invokeQueue
      .filter(item => 'directive' === item[1])
      .map(item => item[2][0]);
  };

  return angular
   .modules
   .map(listDirectives)
   .reduce((acc, l) => acc.concat(l), []);
};

recorrdModules.js

/*
  Inside vendor.js
  source: http://stackoverflow.com/questions/24889783/angularjs-get-list-of-all-registered-modules
*/
(function(orig) {
  angular.modules = [];
  angular.module = function() {
    if (arguments.length > 1) {
      angular.modules.push(arguments[0]);
    }
    return orig.apply(null, arguments);
  }
})(angular.module);