vuex使用mutations同步更新

vue组件中使用mutations

module/numIndex.js

const numIndex = {
  state: {
    num: 0
  },
  mutations: {
    SET_NUM: (state, index) => {
      state.num = index
    }
  }
}
export default numIndex

getters.js

const getters = {
  numIndex: state => state.numIndex.num
}

export default getters

vue组件中使用

import store from '@/store' // 引入store
this.$store.commit('SET_NUM', index)