snapshot of https://github.com/TanStack/query.git (main, 2026-09-16; blobs > 131072B omitted)
This commit is contained in:
upstream-mirror
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---
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id: QueryObserverOptions
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title: QueryObserverOptions
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---
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Defined in: [packages/query-core/src/types.ts:380](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L380)
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## Extends
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- [`WithRequired`](../type-aliases/WithRequired.md)\<[`QueryOptions`](QueryOptions.md)\<`TQueryFnData`, `TError`, `TQueryData`, `TQueryKey`, `TPageParam`\>, `"queryKey"`\>
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## Extended by
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- [`InfiniteQueryObserverOptions`](InfiniteQueryObserverOptions.md)
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- [`CreateBaseQueryOptions`](CreateBaseQueryOptions.md)
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## Type Parameters
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### TQueryFnData
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`TQueryFnData` = `unknown`
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### TError
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`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
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### TData
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`TData` = `TQueryFnData`
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### TQueryData
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`TQueryData` = `TQueryFnData`
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### TQueryKey
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`TQueryKey` *extends* [`QueryKey`](../type-aliases/QueryKey.md) = [`QueryKey`](../type-aliases/QueryKey.md)
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### TPageParam
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`TPageParam` = `never`
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## Properties
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### enabled?
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```ts
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optional enabled: QueryBooleanOption<TQueryFnData, TError, TQueryData, TQueryKey>;
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```
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Defined in: [packages/query-core/src/types.ts:398](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L398)
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Set this to `false` or a function that returns `false` to disable automatic refetching when the query mounts or changes query keys.
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To refetch the query, use the `refetch` method returned from the `useQuery` instance.
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Accepts a boolean or function that returns a boolean.
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Defaults to `true`.
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***
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### gcTime?
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```ts
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optional gcTime: number;
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```
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Defined in: [packages/query-core/src/types.ts:277](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L277)
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The time in milliseconds that unused/inactive cache data remains in memory.
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When a query's cache becomes unused or inactive, that cache data will be garbage collected after this duration.
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When different garbage collection times are specified, the longest one will be used.
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Setting it to `Infinity` will disable garbage collection.
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Defaults to `5 * 60 * 1000` (5 minutes), or `Infinity` during SSR.
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Note: the maximum allowed time is about 24 days, imposed by `setTimeout`'s 32-bit signed integer delay — see
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`timeoutManager.setTimeoutProvider` for a workaround.
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#### Inherited from
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```ts
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WithRequired.gcTime
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```
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***
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### initialData?
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```ts
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optional initialData:
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| TQueryData
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| InitialDataFunction<TQueryData>;
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```
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Defined in: [packages/query-core/src/types.ts:317](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L317)
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If set, this value will be used as the initial data for the query cache (as long as the query hasn't been
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created or cached yet).
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If set to a function, the function will be called **once** during the shared/root query initialization, and be
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expected to synchronously return the initial data.
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Initial data is considered stale by default unless a `staleTime` has been set.
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`initialData` **is persisted** to the cache.
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#### Inherited from
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```ts
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WithRequired.initialData
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```
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***
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### initialDataUpdatedAt?
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```ts
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optional initialDataUpdatedAt: number | () => number | undefined;
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```
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Defined in: [packages/query-core/src/types.ts:321](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L321)
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If set, this value will be used as the time (in milliseconds) of when the `initialData` itself was last updated.
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#### Inherited from
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```ts
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WithRequired.initialDataUpdatedAt
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```
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***
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### maxPages?
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```ts
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optional maxPages: number;
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```
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Defined in: [packages/query-core/src/types.ts:345](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L345)
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Maximum number of pages to store in the data of an infinite query.
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#### Inherited from
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```ts
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WithRequired.maxPages
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```
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***
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### meta?
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```ts
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optional meta: Record<string, unknown>;
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```
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Defined in: [packages/query-core/src/types.ts:341](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L341)
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Additional payload to be stored on each query.
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Use this property to pass information that can be used in other places.
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#### Inherited from
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```ts
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WithRequired.meta
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```
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***
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### networkMode?
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```ts
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optional networkMode: NetworkMode;
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```
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Defined in: [packages/query-core/src/types.ts:265](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L265)
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Controls whether a query is allowed to run based on the current network connectivity.
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Defaults to `'online'`.
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#### See
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[Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
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#### Inherited from
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```ts
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WithRequired.networkMode
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```
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***
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### notifyOnChangeProps?
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```ts
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optional notifyOnChangeProps: NotifyOnChangeProps;
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```
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Defined in: [packages/query-core/src/types.ts:484](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L484)
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If set, the component will only re-render if any of the listed properties change.
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When set to `['data', 'error']`, the component will only re-render when the `data` or `error` properties change.
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When set to `'all'`, the component will re-render whenever a query is updated.
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When set to a function, the function will be executed to compute the list of properties.
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Defaults to `undefined`, in which case property access is tracked automatically, and the
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component only re-renders when one of the tracked properties changes.
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***
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### persister?
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```ts
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optional persister: QueryPersister<TQueryFnData, NoInfer<TQueryKey>, TPageParam>;
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```
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Defined in: [packages/query-core/src/types.ts:290](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L290)
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This option can be used to persist the result of a query to an external storage, bypassing the need to actually
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call the `queryFn`. Useful for persisting a query's data across e.g. server/client boundaries.
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#### Inherited from
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```ts
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WithRequired.persister
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```
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***
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### placeholderData?
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```ts
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optional placeholderData:
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| NonFunctionGuard<TQueryData>
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| PlaceholderDataFunction<NonFunctionGuard<TQueryData>, TError, NonFunctionGuard<TQueryData>, TQueryKey>;
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```
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Defined in: [packages/query-core/src/types.ts:511](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L511)
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If set, this value will be used as the placeholder data for this particular query observer while the query is still in the `loading` data and no initialData has been provided.
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***
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### queryFn?
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```ts
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optional queryFn:
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| typeof skipToken
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| QueryFunction<TQueryFnData, TQueryKey, TPageParam>;
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```
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Defined in: [packages/query-core/src/types.ts:285](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L285)
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The function that the query will use to request data.
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Required, unless a default query function has been set via `queryClient.setQueryDefaults` or
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`queryClient.setDefaultOptions`.
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Receives a [QueryFunctionContext](../type-aliases/QueryFunctionContext.md).
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Must return a promise that will either resolve data or throw an error. The data cannot be `undefined`.
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#### Inherited from
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```ts
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WithRequired.queryFn
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```
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***
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### queryHash?
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```ts
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optional queryHash: string;
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```
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Defined in: [packages/query-core/src/types.ts:295](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L295)
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The hashed form of `queryKey`, computed with `queryKeyHashFn` (or the default hashing function otherwise). Used
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as the actual cache key internally.
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#### Inherited from
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||||
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```ts
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WithRequired.queryHash
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```
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***
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### queryKey
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```ts
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queryKey: TQueryKey & object;
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```
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Defined in: [packages/query-core/src/types.ts:304](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L304)
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The query key to use for this query.
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The query key will be hashed into a stable hash. See [Query Keys](https://tanstack.com/query/latest/docs/framework/react/guides/query-keys)
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for more information.
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The query will automatically update when this key changes (as long as `enabled` is not set to `false`).
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#### Inherited from
|
||||
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||||
```ts
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WithRequired.queryKey
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```
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||||
***
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||||
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### queryKeyHashFn?
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||||
|
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```ts
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optional queryKeyHashFn: QueryKeyHashFunction<TQueryKey>;
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```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:308](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L308)
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If specified, this function is used to hash the `queryKey` to a string.
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#### Inherited from
|
||||
|
||||
```ts
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WithRequired.queryKeyHashFn
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```
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||||
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||||
***
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### refetchInterval?
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|
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```ts
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optional refetchInterval: number | false | (query) => number | false | undefined;
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```
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|
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Defined in: [packages/query-core/src/types.ts:414](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L414)
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||||
If set to a number, the query will continuously refetch at this frequency in milliseconds.
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If set to a function, the function will be executed with the latest data and query to compute a frequency
|
||||
|
||||
Defaults to `false`.
|
||||
|
||||
***
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||||
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||||
### refetchIntervalInBackground?
|
||||
|
||||
```ts
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optional refetchIntervalInBackground: boolean;
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||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:425](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L425)
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||||
|
||||
If set to `true`, the query will continue to refetch while their tab/window is in the background.
|
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Defaults to `false`.
|
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|
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***
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|
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### refetchOnMount?
|
||||
|
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```ts
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optional refetchOnMount: boolean | "always" | (query) => boolean | "always";
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:462](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L462)
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||||
|
||||
If set to `true`, the query will refetch on mount if the data is stale.
|
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If set to `false`, will disable additional instances of a query to trigger background refetch.
|
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If set to `'always'`, the query will always refetch on mount (except when `staleTime: 'static'` is used).
|
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If set to a function, the function will be executed with the latest data and query to compute the value
|
||||
|
||||
Defaults to `true`.
|
||||
|
||||
***
|
||||
|
||||
### refetchOnReconnect?
|
||||
|
||||
```ts
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optional refetchOnReconnect: boolean | "always" | (query) => boolean | "always";
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:448](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L448)
|
||||
|
||||
If set to `true`, the query will refetch on reconnect if the data is stale.
|
||||
If set to `false`, the query will not refetch on reconnect.
|
||||
If set to `'always'`, the query will always refetch on reconnect (except when `staleTime: 'static'` is used).
|
||||
If set to a function, the function will be executed with the latest data and query to compute the value.
|
||||
|
||||
Defaults to `true` unless `networkMode` is `'always'`.
|
||||
|
||||
***
|
||||
|
||||
### refetchOnWindowFocus?
|
||||
|
||||
```ts
|
||||
optional refetchOnWindowFocus: boolean | "always" | (query) => boolean | "always";
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:434](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L434)
|
||||
|
||||
If set to `true`, the query will refetch on window focus if the data is stale.
|
||||
If set to `false`, the query will not refetch on window focus.
|
||||
If set to `'always'`, the query will always refetch on window focus (except when `staleTime: 'static'` is used).
|
||||
If set to a function, the function will be executed with the latest data and query to compute the value.
|
||||
|
||||
Defaults to `true`.
|
||||
|
||||
***
|
||||
|
||||
### retry?
|
||||
|
||||
```ts
|
||||
optional retry: RetryValue<TError>;
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:246](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L246)
|
||||
|
||||
If `false`, failed queries will not retry by default.
|
||||
If `true`, failed queries will retry infinitely.
|
||||
If set to an integer number, e.g. 3, failed queries will retry until the failed query count meets that number.
|
||||
If set to a function `(failureCount, error) => boolean` failed queries will retry until the function returns false.
|
||||
|
||||
Defaults to `3` on the client and `0` on the server.
|
||||
|
||||
#### Inherited from
|
||||
|
||||
```ts
|
||||
WithRequired.retry
|
||||
```
|
||||
|
||||
***
|
||||
|
||||
### retryDelay?
|
||||
|
||||
```ts
|
||||
optional retryDelay: RetryDelayValue<TError>;
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:258](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L258)
|
||||
|
||||
This function receives a `retryAttempt` integer and the actual Error and returns the delay to apply before the
|
||||
next attempt in milliseconds.
|
||||
|
||||
A function like `attempt => Math.min(attempt > 1 ? 2 ** attempt * 1000 : 1000, 30 * 1000)` applies exponential
|
||||
backoff.
|
||||
|
||||
A function like `attempt => attempt * 1000` applies linear backoff.
|
||||
|
||||
Defaults to a function that applies exponential backoff, capped at 30 seconds.
|
||||
|
||||
#### Inherited from
|
||||
|
||||
```ts
|
||||
WithRequired.retryDelay
|
||||
```
|
||||
|
||||
***
|
||||
|
||||
### retryOnMount?
|
||||
|
||||
```ts
|
||||
optional retryOnMount: QueryBooleanOption<TQueryFnData, TError, TQueryData, TQueryKey>;
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:474](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L474)
|
||||
|
||||
If set to `false`, the query will not be retried on mount if it contains an error.
|
||||
If set to a function, the function will be executed with the query to compute the value.
|
||||
|
||||
Defaults to `true`.
|
||||
|
||||
***
|
||||
|
||||
### select()?
|
||||
|
||||
```ts
|
||||
optional select: (data) => TData;
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:500](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L500)
|
||||
|
||||
This option can be used to transform or select a part of the data returned by the query function. It affects
|
||||
the returned `data` value, but does not affect what gets stored in the query cache.
|
||||
The `select` function will only run if `data` changed, or if the reference to the `select` function itself
|
||||
changes. To optimize, memoize the function so its reference stays stable across calls.
|
||||
|
||||
#### Parameters
|
||||
|
||||
##### data
|
||||
|
||||
`TQueryData`
|
||||
|
||||
#### Returns
|
||||
|
||||
`TData`
|
||||
|
||||
***
|
||||
|
||||
### staleTime?
|
||||
|
||||
```ts
|
||||
optional staleTime: StaleTimeFunction<TQueryFnData, TError, TQueryData, TQueryKey>;
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:407](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L407)
|
||||
|
||||
The time in milliseconds after data is considered stale.
|
||||
If set to `Infinity`, the data will never be considered stale.
|
||||
If set to `'static'`, the data will never be considered stale.
|
||||
If set to a function, the function will be executed with the query to compute a `staleTime`.
|
||||
|
||||
Defaults to `0`.
|
||||
|
||||
***
|
||||
|
||||
### structuralSharing?
|
||||
|
||||
```ts
|
||||
optional structuralSharing: boolean | (oldData, newData) => unknown;
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:330](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L330)
|
||||
|
||||
Set this to `false` to disable structural sharing between query results.
|
||||
Set this to a function which accepts the old and new data and returns resolved data of the same type to implement custom structural sharing logic.
|
||||
|
||||
Defaults to `true`.
|
||||
|
||||
#### Inherited from
|
||||
|
||||
```ts
|
||||
WithRequired.structuralSharing
|
||||
```
|
||||
|
||||
***
|
||||
|
||||
### suspense?
|
||||
|
||||
```ts
|
||||
optional suspense: boolean;
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:507](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L507)
|
||||
|
||||
If set to `true`, the query will suspend when `status === 'pending'`
|
||||
and throw errors when `status === 'error'`.
|
||||
|
||||
Defaults to `false`.
|
||||
|
||||
***
|
||||
|
||||
### throwOnError?
|
||||
|
||||
```ts
|
||||
optional throwOnError: ThrowOnError<TQueryFnData, TError, TQueryData, TQueryKey>;
|
||||
```
|
||||
|
||||
Defined in: [packages/query-core/src/types.ts:493](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L493)
|
||||
|
||||
Whether errors should be thrown instead of setting the `error` property.
|
||||
If set to `true` or `suspense` is `true`, all errors will be thrown to the error boundary.
|
||||
If set to `false` and `suspense` is `false`, errors are returned as state.
|
||||
If set to a function, it will be passed the error and the query, and it should return a boolean indicating whether to show the error in an error boundary (`true`) or return the error as state (`false`).
|
||||
|
||||
Defaults to `false`.
|
||||
Reference in New Issue
Block a user