vue实现登陆登出的实现示例

//router.js
router.beforeEach((to, from, next) => {
 // 若userkey不存在并且前往页面不是登陆页面，进入登陆
 // 若userkey存在并且前往登陆页面，进入主页
 const userKey = localStorage.getItem('userKey')
 if (!userKey && to.path !== '/login') {
  next({
   path: '/login',
   query: { redirect: to.fullPath }
  })
 } else if (userKey && to.path === '/login') {
  next({ path: '/' })
 } else {
  next()
 }
})

//若验证成功跳转
 var redirect = decodeURIComponent(this.$route.query.redirect || '/')
     self.$router.push({
      // 你需要接受路由的参数再跳转
      path: redirect
     })

// respone拦截器
axios.interceptors.response.use(
 response => {
  console.log(response)
  const data = response.data
  if (data.status === 0) {
   MessageBox.alert('你已被登出，可以取消继续留在该页面，或者重新登录', '确定登出', {
    confirmButtonText: '确定',
    type: 'warning'
   }).then(() => {
    localStorage.clear()
    router.replace({
     path: '/login'
    })
    return
   }).catch(() => {
    localStorage.clear()
    router.replace({
     path: '/login'
    })
   })
  } else {
   return response
  }
 },
 error => {
  if (error && error.response) {
   switch (error.response.status) {
    case 400:
     error.message = '请求错误'
     break
    case 401:
     error.message = '未授权，请登录'
     break
    case 403:
     error.message = '拒绝访问'
     break
    case 404:
     error.message = (process.env.NODE_ENV === 'production' ? `请求地址出错` : `请求地址出错: ${error.response.config.url}`)
     break
    case 408:
     error.message = '请求超时'
     break
    case 500:
     error.message = '服务器内部错误'
     break
    case 501:
     error.message = '服务未实现'
     break
    case 502:
     error.message = '网关错误'
     break
    case 503:
     error.message = '服务不可用'
     break
    case 504:
     error.message = '网关超时'
     break
    case 505:
     error.message = 'HTTP版本不受支持'
     break
    default:
   }
   Message({
    message: error.message,
    type: 'error',
    duration: 5 * 1000
   })
  }
  return Promise.reject(error)
 }
)

 loginOut() {
   var self = this
   this.$confirm('您确定要退出吗?', '退出管理平台', {
    confirmButtonText: '确定',
    cancelButtonText: '取消'
   }).then(() => {
    const info = {
     'userkey': localStorage.getItem('userKey')
    }
    self.$store.dispatch('LogOut', info).then(() => {
     self.$router.push({ path: '/login' })
    }).catch(() => {
    })
   }).catch(() => {

   })
  }