Я использую ES6 с Webpack es6-транспортером в моей статье здесь:http://www.railsonmaui.com/blog/2014/10/02/integrating-webpack-and-the-es6-transpiler-into-an-existing-rails-project/

Имеет ли смысл преобразовывать два объекта Singleton в классы ES6?

import { CHANGE_EVENT } from "../constants/Constants";

var EventEmitter = require('events').EventEmitter;
var merge = require('react/lib/merge');

var _flash = null;

var BaseStore = merge(EventEmitter.prototype, {

  emitChange: function() {
    this.emit(CHANGE_EVENT);
  },

  /**
   * @param {function} callback
   */
  addChangeListener: function(callback) {
    this.on(CHANGE_EVENT, callback);
  },

  /**
   * @param {function} callback
   */
  removeChangeListener: function(callback) {
    this.removeListener(CHANGE_EVENT, callback);
  },

  getFlash: function() {
    return _flash;
  },

  setFlash: function(flash) {
    _flash = flash;
  }
});

export { BaseStore };

Это файл ManagerProducts.jsx, содержащий синглтон, который должен выходить из BaseStore.

/**
 * Client side store of the manager_product resource
 */
import { BaseStore } from "./BaseStore";
import { AppDispatcher } from '../dispatcher/AppDispatcher';
import { ActionTypes } from '../constants/Constants';
import { WebAPIUtils } from '../utils/WebAPIUtils';
import { Util } from "../utils/Util";
var merge = require('react/lib/merge');

var _managerProducts = [];

var receiveAllDataError = function(action) {
  console.log("receiveAllDataError %j", action);
  WebAPIUtils.logAjaxError(action.xhr, action.status, action.err);
};

var ManagerProductStore = merge(BaseStore, {
  getAll: function() {
    return _managerProducts;
  }
});

var receiveAllDataSuccess = function(action) {
  _managerProducts = action.data.managerProducts;
  //ManagerProductStore.setFlash({ message: "Manager Product data loaded"});
};


ManagerProductStore.dispatchToken = AppDispatcher.register(function(payload) {
  var action = payload.action;
  if (Util.blank(action.type)) { throw `Invalid action, payload ${JSON.stringify(payload)}`; }

  switch(action.type) {
    case ActionTypes.RECEIVE_ALL_DATA_SUCCESS:
      receiveAllDataSuccess(action);
      break;
    case ActionTypes.RECEIVE_ALL_DATA_ERROR:
      receiveAllDataError(action);
      break;
    default:
      return true;
  }
  ManagerProductStore.emitChange();
  return true;
});

export { ManagerProductStore };