Reactnative RTK 查询显示互联网何时关闭

您可以使用navigator.onLine来判断用户的设备当前是否在线.然后监听在线事件，该事件在设备的互联网连接恢复时触发，并重新获取数据.

const ShoppingCart: React.FC<Props> = ({}) => {
  const user_id = useSelector((state: RootState) => state.Auth.user.user_id);
  const { data, isFetching, isLoading, refetch } = useCartQuery({user_id});

  useEffect(() => {
    const handleOnlineEvent = () => {
      // Refetch data from the API when the online event is fired
      refetch();
    };

    window.addEventListener('online', handleOnlineEvent);

    return () => {
      window.removeEventListener('online', handleOnlineEvent);
    };
  }, []);

  if (!navigator.onLine) {
    return (
      <div>
        <p>You are currently offline. Please check your internet connection and try again.</p>
      </div>
    );
  }

  if (isLoading) {
    return (
      <Loader />
    )
  } else if(data && data.length > 0) {
    return (
      <ShoppingCartComponent
        products={data}
      />
    )
  } else if(data && data.length === 0) {
    return (
      <ShoppingCartEmpty />
    )
  }
}