meta:{

requireAuth:true

}

{

  path: '/xx',

  name: 'xx',

  component: xx,

  meta:{

    requireAuth:true

  }

},

router.beforeEach(function (to, from, next) {

  // to 想要去哪里

  // from 从哪里来

  // next 跳转到哪里

  if(to.meta.requireAuth){

    // 要去的url只有登陆成功后才能访问

    if (store.state.token) {

      next()

    } else {

      next({name: 'login',query: {backUrl: to.fullPath}})

    }

  // 没有 meta条件，直接跳转

  }else{

    next()

  }

});

var url = that.$route.query.backUrl;

    if(url){

      that.$router.push({path: url})

    }else{

      that.$router.push({path: '/index'})

}