import Vue from 'vue'
import App from './App.vue'
import store from './store.js'

new Vue({
 store,
 el: '#app',
 render: h => h(App)
})

import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)
// 這里定義初始值
let state = {
 count:10
};
const mutations = {
 add(context){
  context.count++
 },
 decrease(context){
  context.count--
 }
};
// 事件觸發(fā)后的邏輯操作
// 參數(shù)為事件函數(shù)
const actions = {
 add(add){
  add.commit('add')
 },
 decrease(decrease){
  decrease.commit('decrease')
 },
 oddAdd({commit,state}){
  if (state.count % 2 === 0) {
   commit('add')
  }
 }
};
// 返回改變后的數(shù)值
const getters = {
 count(context){
  return context.count
 },
 getOdd(context) {
  return context.count % 2 === 0 ? '偶數(shù)' : '奇數(shù)'
 }
};
export default new Vuex.Store({
 state,
 mutations,
 actions,
 getters
})

<template>
 <div id="app">
 <button @click="add">add</button>
 <button @click="decrease">decrease</button>
 <button @click="oddAdd">oddAdd</button>
 <div>{{count}}</div>
 <div>{{getOdd}}</div>
 </div>
</template>
<script>
import {mapGetters,mapActions} from 'vuex'
 export default {
  // 得到計算后的值
  computed:mapGetters(['count','getOdd']),
  // 發(fā)生點擊事件觸發(fā)不同函數(shù)
  methods:mapActions(['add','decrease','oddAdd'])
 }
</script>