vue mapState,mapMutations,mapGetters

main.js

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import store from './store'
import App from './vuex'
import router from './router'
import vuex from './vuex.vue'

Vue.config.productionTip = false

/* eslint-disable no-new */
new Vue({
  el: '#app',
  store,
  router,
  render: xx=>xx(vuex)
})

store.js

import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)

const state={
	count:44
}

const mutations={
	add(state,n){
		state.count+=n.b
	},
	plus(state){
		state.count--
	}
}

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

vuex.vue

------------------------------------------------------------------------

mapGetters

store.js

import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)

const state={
	count:44
}

const mutations={
	add(state,n){
		state.count+=n.b
	},
	plus(state){
		state.count--
	}
}

const getters = {
	count:function(state){
		return state.count+=100
	}
}

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

vuex.vue