1.@/store/modules/app.js 设置vuex

import { login as loginApi } from '@/api/login'
// 导入路由跳转
import router from '@/router'
export default {
  namespaced: true,
  state: () => ({
    token: localStorage.getItem('token') || ''
  }),
  mutations: {
    setToken(state, token) {
      state.token = token
      localStorage.setItem('token', token)
    }
  },
  actions: {
    login({ commit }, userInfo) {
      return new Promise((resolve, reject) => {
        loginApi(userInfo)
          .then((res) => {
            console.log(res)
            commit('setToken', res.token)

            // 跳转到首页
            router.replace('/')
            resolve()
          })
          .catch((err) => {
            reject(err)
          })
      })
    }
  }
}

2.@/store/index.js配置使用

import { createStore } from 'vuex'
import app from './modules/app'
export default createStore({
  modules: {
    app
  }
})

3.@/views/login/index.vue使用

//使用vuex
import { useStore } from 'vuex'
const store = useStore()

// 登录
const handleConfirm = () => {
  formRef.value.validate(async (valid) => {
    if (valid) {
      store.dispatch('app/login', form.value)
    } else {
      // 失败
    }
  })
}