exotic-emerald

Using useSuspenseQuery for paginated requests

Am I understanding correctly that useSuspenseQuery is not the preferred way to render paginated data because, when changing pages, it is harder to show a loading state due to the existing data from the previous page? Or am I missing something? I am changing pages through React Router search params from another component. Currently, page changes work, but there is no indication of a loading state as there is with the initial useSuspenseQuery fetching.

10 Replies

absent-sapphire•6mo ago

status is always success the derived flags are set accordingly.

so these do not make sense to use:

isPending: boolean A derived boolean from the status variable above, provided for convenience. isSuccess: boolean A derived boolean from the status variable above, provided for convenience. isError: boolean A derived boolean from the status variable above, provided for convenience.

Can you try using isFetching to show the loading indicator?

exotic-emeraldOP•6mo ago

The problem with isFetching is that it also triggers the loading indicator when the page is being refetched (e.g., when you focus on the tab again). This makes it difficult to know whether you're refetching the same page or navigating to a different one.

genetic-orange•6mo ago

We use a modified version of this hook: https://www.teemutaskula.com/blog/exploring-query-suspense It will suspend to your suspense boundary on first load but not subsequent loads. This allows us to show a small spinner that is localized to the change when we want but otherwise only show the initial suspense boundary fallback state initially.

Exploring using Suspense with React Query

Learn how I explored using Suspense with React Query and what issues I encountered and how I solved them.

exotic-emeraldOP•6mo ago

Woah, that looks exactly like what I've been looking for. Thanks!

fascinating-indigo•6mo ago

careful with this tho: return { ...query, isSuspending }; https://tanstack.com/query/latest/docs/framework/react/guides/render-optimizations#tracked-properties

If you use object rest destructuring, you will disable this optimization.

  const newQuery = query as typeof query & { isSuspending: boolean };
  newQuery.isSuspending = query.isFetching && queryKey !== deferredQueryKey;

  return newQuery;

  const newQuery = query as typeof query & { isSuspending: boolean };
  newQuery.isSuspending = query.isFetching && queryKey !== deferredQueryKey;

  return newQuery;

I use this instead

exotic-emeraldOP•6mo ago

You saved me a lot of time debugging, I think. Thank you!

ambitious-aqua•6mo ago

Hi everyone 👋 Happy to hear that my article was helpful and thanks for pointing out the issue with property tracking. I've updated the article to use the proposed solution by @ferretwithabéret If you guys have any other improvement ideas don't hesitate to share 😊

fascinating-indigo•6mo ago

Ngl, I was thinking about emailing you about it, glad you noticed this thread

ambitious-aqua•6mo ago

@514sid actually emailed me about it which is how I noticed this discussion 😄 So big thanks to Sid as well 🤝

fascinating-indigo•2mo ago

This seems to trigger react-compiler's eslint rules, at least in my RN project. Fixed it with

  const newQuery = query as typeof query & { isSuspending: boolean };
  Object.assign(newQuery, {
    isSuspending: query.isFetching && queryKey !== deferredQueryKey,
  });

  const newQuery = query as typeof query & { isSuspending: boolean };
  Object.assign(newQuery, {
    isSuspending: query.isFetching && queryKey !== deferredQueryKey,
  });

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Using useSuspenseQuery for paginated requests

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