Description
Describe the bug
In development mode on page refresh this error appears. It is related to this code in layouts/PageLayout/PageLayout.tsx:
Error: This Suspense boundary received an update before it finished hydrating.
This caused the boundary to switch to client rendering.
The usual way to fix this is to wrap the original update in startTransition.
const PageLayout: FC<Props> = ({ children, noPaddingTop = false }) => {
const b = withBem('page-layout');
return (
<ErrorBoundaryWrapper errorFallbackType="screen">
<SuspenseWrapper loaderType="screen">
<MeProvider>
<div className={b()}>
<Navbar />
<div className={b('navbar-placeholder')} />
<main className={b('content', { 'no-padding-top': noPaddingTop })}>
{/* Views (page) level loading and error handling */}
<ErrorBoundaryWrapper errorFallbackType="page">
<SuspenseWrapper loaderType="page">{children}</SuspenseWrapper>
</ErrorBoundaryWrapper>
</main>
<Footer />
</div>
</MeProvider>
</SuspenseWrapper>
</ErrorBoundaryWrapper>
);
};It's related to logged in user being fetched between two Suspense boundaries, and that user object affects states in child components, causing difference on client and server. It is enough to remove inner Suspense boundary to prevent the error. Another way to prevent it is to render null in MeProvider when useMe is in loading state, but that causes entire UI to flicker.
This error is easy to reproduce when query keys mismatch in prefetchQuery in getServerSideProps and client side useQuery. But some other state mismatch between client and server also causes this error, I wasn't able to determine which state mismatch exactly.
Here is the link of test case repository for reproduction:
https://github.com/nemanjam/hydration-test-case
// my-react-query/posts/usePosts.ts
export const usePosts = () => {
const query = useQuery<Post[], AxiosError>(['posts'], () => getPosts());
return query;
};
// 2.
// pages/index.tsx
export const getServerSideProps: GetServerSideProps = async ({ req, res }) => {
const queryClient = new QueryClient();
await queryClient.prefetchQuery(['posts'], () => posts);
};To Reproduce
Start app in development mode, login as any user, go to profile or home page and refresh it few times, this error will appear. In production build it doesn't seem to appear.
Expected behavior
Error should not appear on page refresh.
Screenshots
Environment (please complete the following information):
- Development or production app environment: development
- Browser [e.g. chrome v60.12.0, safari 10.1]: both Chrome and Firefox
- OS: [e.g. iOS, Windows x64] (if applicable): Ubuntu 20.04
- node version (if applicable): v16.13.1
Additional context
Here is related issue in React repository but suggested solution to memoize children prop does not prevent error and just causes stale links in navbar.