Javascript: Redux: Dispatching Multiple Actions: Custom Middleware

multidispatch-middleware.js

// First, our action creator.
const MULTI_ACTION = 'multiAction/MULTI_ACTION';
const multiAction = (actions, meta = {}) => ({
  type: MULTI_ACTION,
  payload: { actions },
  meta,
});

// Next, the middleware itself.
const multiActionMiddleware = store => next => action => {
  switch (action.type) {
    case MULTI_ACTION: {
      next(action);
      const results = action.payload.actions.map(a => store.dispatch(a));
      return results;
    }
      
    default: return next(action);
  }
};