解决vue2.0路由跳转未匹配相应用路由避免出现空白页面

router.beforeEach((to, from, next) => {
  if (to.matched.length ===0) {                                        //如果未匹配到路由
    from.name ? next({ name:from.name }) : next('/');   //如果上级也未匹配到路由则跳转登录页面，如果上级能匹配到则转上级路由
  } else {
    next();                                                                            //如果匹配到正确跳转
  }
});

router.beforeEach((to, from, next) => {
  let token = sessionStorage.getItem('token');
  // let needAuth = to.matched.some(record => record.meta.requiresAuth);
  if(!token && to.path !='/login'){
    sessionStorage.removeItem('token');
    next({path: "/login"});
  }else {
    next();
  }
});