Next.js 13中useRouter的push方法不再异步，如何维护加载状态？

Next.js 13 App Router的useRouter.push不再返回Promise，没法通过.then()监听导航完成状态，导致无法精准控制loading spinner的显示/隐藏。以下是几个实用的解决办法：

1. 用React的useTransition钩子（官方推荐） #

useTransition是React专门处理过渡状态的API，完美适配App Router的导航逻辑，能自动跟踪导航的pending状态。

代码示例（本地状态） #

import { useRouter } from 'next/navigation';
import { useTransition } from 'react';

const RedirectButton = ({ href }: { href: string }) => {
  const router = useRouter();
  const [isPending, startTransition] = useTransition();

  const handleRedirect = () => {
    startTransition(() => {
      router.push(href);
    });
  };

  return (
    <button onClick={handleRedirect} disabled={isPending}>
      {isPending ? '跳转中...' : '立即跳转'}
    </button>
  );
};

结合状态管理（比如Redux） #

import { useRouter } from 'next/navigation';
import { useTransition, useEffect } from 'react';
import { useDispatch } from 'react-redux';
import { setLoading } from '@/store/slices/uiSlice';

const redirectUser = (href: string) => {
  const router = useRouter();
  const dispatch = useDispatch();
  const [isPending, startTransition] = useTransition();

  useEffect(() => {
    dispatch(setLoading(isPending));
  }, [isPending, dispatch]);

  return () => {
    startTransition(() => {
      router.push(href);
    });
  };
};

2. 监听路径变化手动重置状态 #

通过usePathname监听当前路径，当导航完成路径更新后，手动重置loading状态。需要注意排除初始渲染的情况。

import { useRouter, usePathname } from 'next/navigation';
import { useEffect, useState } from 'react';
import { useDispatch } from 'react-redux';
import { setLoading } from '@/store/slices/uiSlice';

const RedirectComponent = () => {
  const router = useRouter();
  const pathname = usePathname();
  const dispatch = useDispatch();
  const [prevPath, setPrevPath] = useState(pathname);

  useEffect(() => {
    if (pathname !== prevPath) {
      dispatch(setLoading(false));
      setPrevPath(pathname);
    }
  }, [pathname, prevPath, dispatch]);

  const handleRedirect = (href: string) => {
    dispatch(setLoading(true));
    router.push(href);
  };

  return <button onClick={() => handleRedirect('/dashboard')}>去控制台</button>;
};

3. 用Suspense实现全局页面加载 #

如果只需要在页面切换时显示全局加载状态，直接用Suspense包裹页面组件，Next.js会自动在页面加载期间展示fallback内容。

// app/layout.tsx
import { Suspense } from 'react';
import LoadingSpinner from '@/components/LoadingSpinner';

export default function RootLayout({ children }) {
  return (
    <html lang="zh-CN">
      <body>
        <Suspense fallback={<LoadingSpinner />}>
          {children}
        </Suspense>
      </body>
    </html>
  );
}

内容的提问来源于stack exchange，提问作者Shivam Sahil