Simple Vue & Vuex fetch example using @feathersjs for realtime data.

actions.js

// vuex/actions.js
import feathers from 'feathers/client'
import socketio from 'feathers-socketio/client'
import io from 'socket.io-client'

const socket = io('http://localhost:3030')
const app = feathers().configure(socketio(socket))

// Get the message service that uses a websocket connection
const messageService = app.service('messages')

export const fetchMessages = function ({dispatch}) {
  // Call the messages service on the server via websocket
  messageService.find({}).then(result => {
    dispatch('FETCH_MESSAGES', result.data)
  })
}

export const addMessage = function ({ dispatch }, text) {
  messageService.create({ text }).then(result => {
    dispatch('ADD_MESSAGE', result)
  })
}

App.js

// App.js
<template>
  <div id="app">
    <Messages></Messages>
  </div>
</template>

<script>
import Messages from './components/Messages'
import store from './vuex/store'

export default {
  components: { Messages },
  store // ES6 equivalent of store: store
}
</script>

getters.js

// vuex/getters.js
export const getMessages = state => state.messages

Messages.vue

// components/Messages.vue<template>
  <div>
    <input type="text" placeholder="Enter message" v-model="newMessage">
    <button type="submit" @click="tryAddMessage">Add message</button>
    <ul>
      <li v-for="message in messages">
        <span>{{ message.text }}</span>
      </li>
    </ul>
  </div>
</template>

<script>
  import { getMessages } from '../vuex/getters'
  import { fetchMessages, addMessage } from '../vuex/actions'

  export default {
    data () {
      return {
        newMessage: ''
      }
    },
    ready () {
      this.fetchMessages()
    },
    methods: {
      tryAddMessage () {
        var text = this.newMessage
        if (text.trim()) {
          this.addMessage(text)
        }
      }
    },
    vuex: {
      getters: {
        messages: getMessages
      },
      actions: {
        fetchMessages,
        addMessage
      }
    }
  }
</script>

store.js

// vuex/store.js
import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)

const state = {
  messages: []
}

const mutations = {
  FETCH_MESSAGES (state, messages) {
    state.messages = messages
  },

  ADD_MESSAGE (state, message) {
    state.messages.push(message)
  }
}

export default new Vuex.Store({
  state,
  mutations
})