app.js

import Flux from 'path/to/flux.js'

window.MyApp.flux = new Flux()

flux.js

import { Actions, Store, Flummox } from 'flummox';

export default class Flux extends Flummox {
  constructor() {
    super();
    this.createActions('Widgets', require('path/to/widget_actions'));
    this.createActions('Widgets', require('path/to/widget_store'), this);
  }
}

my_component.jsx

var React = require('react')

module.exports = React.createClass({
  
  // reactStuff
  
  handleCreate: function(widget_data) {
    // 
    // … but we can also use the response in the widget to do something afterward ("then")
    // 
    const response = await MyApp.flux.getActions('Widgets').createWidget(widget_data)
    
    if (response.status == 'success') {
      this.closeThisComponent()
    } else {
      // do smething on fail
    }
  },
  
})

widget_actions.js

import { Actions } from 'flummox';

var $ = require('jquery') // or some other ajax lib resource

export default class WidgetActions extends Actions {
  // 
  // inspired by https://reactiflux.slack.com/archives/flummox/p1432075752001274
  // Using an async will dispatch the response to the store…
  // 
  async createWidget(widget_data) {
    let response;
    await $.post('/api/widgets',widget_data).done((data,status) => {
      response = { data, status }
    })
    return await response
  }
}

widget_store.js

import { Store } from 'flummox';

export default class WidgetStore extends Store {

  constructor(flux) {
    super(); // Don't forget this step
    const actions = flux.getActions('Widgets');
    this.register(actions.createWidget, this.handleCreate);
    this.state = {};
  }
  
  handleCreate(widget_data) {
    // do something w/ your new widget delivered from the server via the action promise
  }
  
}

Webpack doesn't seem to like await used like this. Doesn't await need to be within an async?