redux example for service worker notification

service-worker-redux.js

import { createSelector } from 'reselect'

// CONSTANTS
export const UPDATE_SERVICEWORKER = 'UPDATE_SERVICEWORKER'

export function updateServiceworker () {
  return {
    type: UPDATE_SERVICEWORKER
  }
}

export const reducer = (state = {
  serviceWorkerUpdated: false
}, action) => {
  switch (action.type) {
    case UPDATE_SERVICEWORKER: {
      return {
        ...state,
        serviceWorkerUpdated: true
      }
    }
    default:
      return state
  }
}

const serviceWorker = (state) => state.serviceWorker

export const getServiceWorker = createSelector(
  [serviceWorker],
  (serviceWorker) => serviceWorker
)