basic-handle-actions.js

import { postsActions } from '../actions/posts'
import { handleActions } from 'redux-actions'

const initialState = []
const handlers = {
  [postsActions.posts.set]: (state, action) => action.posts,
  [postsActions.posts.append]: (state, action) => [...state, ...action.post]
}

export const postsReducer = handleActions(handlers, initialState)