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Fetch without the data rendering.

This can be useful for ensuring resources early in a render tree before they are needed.


Use in combination with a data-binding hook (useCache(), useSuspense(), useDLE(), useLive()) in another component.


function MasterPost({ id }: { id: number }) {
useFetch(PostResource.get, { id });
// ...


Expiry StatusFetchReturnsConditions
Invalidyes1Promisenot in store, deletion, invalidation
Staleyes1Promise(first-render, arg change) & expiry < now
Validnoundefinedfetch completion
noundefinednull used as second argument
  1. Identical fetches are automatically deduplicated
React Native

When using React Navigation, useFetch() will trigger fetches on focus if the data is considered stale.

Conditional Dependencies

Use null as the second argument on any rest hooks to indicate "do nothing."

// todo could be undefined if id is undefined
const todo = useFetch(TodoResource.get, id ? { id } : null);


function useFetch(
endpoint: ReadEndpoint,
...args: Parameters<typeof endpoint> | [null]
): Promise<any> | undefined;