您可以使用Vuex操作、getter、计算属性和监视器的组合来侦听Vuex状态值的变化。

HTML代码:

<div id="app" :style='style'>
  <input v-model='computedColor' type="text" placeholder='Background Color'>
</div>

JavaScript代码:

'use strict'

Vue.use(Vuex)

const { mapGetters, mapActions, Store } = Vuex

new Vue({
    el: '#app',
  store: new Store({
    state: {
      color: 'red'
    },
    getters: {
      color({color}) {
        return color
      }
    },
    mutations: {
      setColor(state, payload) {
        state.color = payload
      }
    },
    actions: {
      setColor({commit}, payload) {
        commit('setColor', payload)
      }
    }
  }),
  methods: {
    ...mapGetters([
        'color'
    ]),
    ...mapActions([
        'setColor'
    ])
  },
  computed: {
    computedColor: {
        set(value) {
        this.setColor(value)
      },
      get() {
        return this.color()
      }
    },
    style() {
        return `background-color: ${this.computedColor};`
    }
  },
  watch: {
    computedColor() {
        console.log(`Watcher in use @${new Date().getTime()}`)
    }
  }
})

参见JSFiddle演示。

我用了这种方法，它很有效:

store.js:

const state = {
  createSuccess: false
};

mutations.js

[mutations.CREATE_SUCCESS](state, payload) {
    state.createSuccess = payload;
}

actions.js

async [mutations.STORE]({ commit }, payload) {
  try {
    let result = await axios.post('/api/admin/users', payload);
    commit(mutations.CREATE_SUCCESS, user);
  } catch (err) {
    console.log(err);
  }
}

getters.js

isSuccess: state => {
    return state.createSuccess
}

在你使用state from store的组件中:

watch: {
    isSuccess(value) {
      if (value) {
        this.$notify({
          title: "Success",
          message: "Create user success",
          type: "success"
        });
      }
    }
  }

当用户提交表单时，action STORE将被调用，创建成功后，CREATE_SUCCESS突变将被提交。Turn createsuccsuccess为true，在组件中，监控器将看到值已更改并触发通知。

isSuccess应该匹配你在geters .js中声明的名称

====== store ===== import Vue from 'vue' import Vuex from 'vuex' import axios from 'axios' Vue.use(Vuex) export default new Vuex.Store({ state: { showRegisterLoginPage: true, user: null, allitem: null, productShow: null, userCart: null }, mutations: { SET_USERS(state, payload) { state.user = payload }, HIDE_LOGIN(state) { state.showRegisterLoginPage = false }, SHOW_LOGIN(state) { state.showRegisterLoginPage = true }, SET_ALLITEM(state, payload) { state.allitem = payload }, SET_PRODUCTSHOW(state, payload) { state.productShow = payload }, SET_USERCART(state, payload) { state.userCart = payload } }, actions: { getUserLogin({ commit }) { axios({ method: 'get', url: 'http://localhost:3000/users', headers: { token: localStorage.getItem('token') } }) .then(({ data }) => { // console.log(data) commit('SET_USERS', data) }) .catch(err => { console.log(err) }) }, addItem({ dispatch }, payload) { let formData = new FormData() formData.append('name', payload.name) formData.append('file', payload.file) formData.append('category', payload.category) formData.append('price', payload.price) formData.append('stock', payload.stock) formData.append('description', payload.description) axios({ method: 'post', url: 'http://localhost:3000/products', data: formData, headers: { token: localStorage.getItem('token') } }) .then(({ data }) => { // console.log('data hasbeen created ', data) dispatch('getAllItem') }) .catch(err => { console.log(err) }) }, getAllItem({ commit }) { axios({ method: 'get', url: 'http://localhost:3000/products' }) .then(({ data }) => { // console.log(data) commit('SET_ALLITEM', data) }) .catch(err => { console.log(err) }) }, addUserCart({ dispatch }, { payload, productId }) { let newCart = { count: payload } // console.log('ini dari store nya', productId) axios({ method: 'post', url: `http://localhost:3000/transactions/${productId}`, data: newCart, headers: { token: localStorage.getItem('token') } }) .then(({ data }) => { dispatch('getUserCart') // console.log('cart hasbeen added ', data) }) .catch(err => { console.log(err) }) }, getUserCart({ commit }) { axios({ method: 'get', url: 'http://localhost:3000/transactions/user', headers: { token: localStorage.getItem('token') } }) .then(({ data }) => { // console.log(data) commit('SET_USERCART', data) }) .catch(err => { console.log(err) }) }, cartCheckout({ commit, dispatch }, transactionId) { let count = null axios({ method: 'post', url: `http://localhost:3000/transactions/checkout/${transactionId}`, headers: { token: localStorage.getItem('token') }, data: { sesuatu: 'sesuatu' } }) .then(({ data }) => { count = data.count console.log(count, data) dispatch('getUserCart') }) .catch(err => { console.log(err) }) }, deleteTransactions({ dispatch }, transactionId) { axios({ method: 'delete', url: `http://localhost:3000/transactions/${transactionId}`, headers: { token: localStorage.getItem('token') } }) .then(({ data }) => { console.log('success delete') dispatch('getUserCart') }) .catch(err => { console.log(err) }) } }, modules: {} })

如上所述，直接在商店中观察变化并不是一个好主意

但在一些非常罕见的情况下，它可能对某人有用，所以我将留下这个答案。其他情况请参见@gabriel-robert answer

你可以通过州政府，$watch。将此添加到组件中创建的(或需要执行此方法的地方)方法中

this.$store.watch(
    function (state) {
        return state.my_state;
    },
    function () {
        //do something on data change
    },
    {
        deep: true //add this if u need to watch object properties change etc.
    }
);

详情:https://vuex.vuejs.org/api/#watch

你也可以使用debouncedWatch (vue使用函数)安全地观看它

  debouncedWatch(
    lines,
    () => {
      console.log('changed');
    },
    500,
  );

我想提问者想用带有Vuex的手表。

this.$store.watch(
      (state)=>{
        return this.$store.getters.your_getter
      },
      (val)=>{
       //something changed do something

      },
      {
        deep:true
      }
      );