判断浏览器关闭还是刷新，然后清除登录信息

<script>
export default {
  mounted() {
    var that = this
    window.onload = function() {
      if (!window.sessionStorage['tempFlag']) {
        console.log('关闭~~')
        localStorage.clear()
        that.$router.push({ name: 'login' })
      } else {
        console.log('刷新~~~')
        window.sessionStorage.removeItem('tempFlag')
      }
    }

    window.onunload = function () {
      window.sessionStorage['tempFlag'] = false
    }

    window.onbeforeunload = function () {
      window.sessionStorage['tempFlag'] = true
    }
  }
}
</script>

vue的话 在 mount 里面写