Redux Middleware: Simple local storage single item cache

middleware.js

const cacheMiddleware = store => next => action => {
  if(action.type !== 'GET_SOMETHING') {
    return next(action);
  }
  const data = getFromLocalstorage()
  if(!data) {
    // Fetch and put to localstorate for later use
    const data = fetchFromServer()
    return next({ type: 'SERVER_RESULT', data })
  }
  return next({ type: 'CACHED_RESULT', data });
};