snapshot of https://github.com/TanStack/query.git (main, 2026-09-16; blobs > 131072B omitted)

docs/framework/angular/reference/interfaces/QueryObserverLoadingErrorResult.md

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+---
+id: QueryObserverLoadingErrorResult
+title: QueryObserverLoadingErrorResult
+---
+
+Defined in: [packages/query-core/src/types.ts:923](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L923)
+
+## Extends
+
+- [`QueryObserverBaseResult`](QueryObserverBaseResult.md)\<`TData`, `TError`\>
+
+## Type Parameters
+
+### TData
+
+`TData` = `unknown`
+
+### TError
+
+`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
+
+## Properties
+
+### data
+
+```ts
+data: undefined;
+```
+
+Defined in: [packages/query-core/src/types.ts:927](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L927)
+
+The last successfully resolved data for the query.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`data`](QueryObserverBaseResult.md#data)
+
+***
+
+### dataUpdatedAt
+
+```ts
+dataUpdatedAt: number;
+```
+
+Defined in: [packages/query-core/src/types.ts:775](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L775)
+
+The timestamp for when the query most recently returned the `status` as `"success"`.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`dataUpdatedAt`](QueryObserverBaseResult.md#dataupdatedat)
+
+***
+
+### error
+
+```ts
+error: TError;
+```
+
+Defined in: [packages/query-core/src/types.ts:928](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L928)
+
+The error object for the query, if an error was thrown.
+- Defaults to `null`.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`error`](QueryObserverBaseResult.md#error)
+
+***
+
+### errorUpdateCount
+
+```ts
+errorUpdateCount: number;
+```
+
+Defined in: [packages/query-core/src/types.ts:799](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L799)
+
+The sum of all errors.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`errorUpdateCount`](QueryObserverBaseResult.md#errorupdatecount)
+
+***
+
+### errorUpdatedAt
+
+```ts
+errorUpdatedAt: number;
+```
+
+Defined in: [packages/query-core/src/types.ts:784](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L784)
+
+The timestamp for when the query most recently returned the `status` as `"error"`.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`errorUpdatedAt`](QueryObserverBaseResult.md#errorupdatedat)
+
+***
+
+### failureCount
+
+```ts
+failureCount: number;
+```
+
+Defined in: [packages/query-core/src/types.ts:790](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L790)
+
+The failure count for the query.
+- Incremented every time the query fails.
+- Reset to `0` when the query succeeds.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`failureCount`](QueryObserverBaseResult.md#failurecount)
+
+***
+
+### failureReason
+
+```ts
+failureReason: TError | null;
+```
+
+Defined in: [packages/query-core/src/types.ts:795](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L795)
+
+The failure reason for the query retry.
+- Reset to `null` when the query succeeds.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`failureReason`](QueryObserverBaseResult.md#failurereason)
+
+***
+
+### fetchStatus
+
+```ts
+fetchStatus: FetchStatus;
+```
+
+Defined in: [packages/query-core/src/types.ts:889](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L889)
+
+The fetch status of the query.
+- `fetching`: Is `true` whenever the queryFn is executing, which includes initial `pending` as well as background refetch.
+- `paused`: The query wanted to fetch, but has been `paused`.
+- `idle`: The query is not fetching.
+- See [Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`fetchStatus`](QueryObserverBaseResult.md#fetchstatus)
+
+***
+
+### isEnabled
+
+```ts
+isEnabled: boolean;
+```
+
+Defined in: [packages/query-core/src/types.ts:867](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L867)
+
+`true` if this observer is enabled, `false` otherwise.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isEnabled`](QueryObserverBaseResult.md#isenabled)
+
+***
+
+### isError
+
+```ts
+isError: true;
+```
+
+Defined in: [packages/query-core/src/types.ts:929](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L929)
+
+A derived boolean from the `status` variable, provided for convenience.
+- `true` if the query attempt resulted in an error.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isError`](QueryObserverBaseResult.md#iserror)
+
+***
+
+### isFetched
+
+```ts
+isFetched: boolean;
+```
+
+Defined in: [packages/query-core/src/types.ts:808](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L808)
+
+Will be `true` if the query has been fetched.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isFetched`](QueryObserverBaseResult.md#isfetched)
+
+***
+
+### isFetchedAfterMount
+
+```ts
+isFetchedAfterMount: boolean;
+```
+
+Defined in: [packages/query-core/src/types.ts:813](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L813)
+
+Will be `true` if the query has been fetched after the component mounted.
+- This property can be used to not show any previously cached data.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isFetchedAfterMount`](QueryObserverBaseResult.md#isfetchedaftermount)
+
+***
+
+### isFetching
+
+```ts
+isFetching: boolean;
+```
+
+Defined in: [packages/query-core/src/types.ts:818](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L818)
+
+A derived boolean from the `fetchStatus` variable, provided for convenience.
+- `true` whenever the `queryFn` is executing, which includes initial `pending` as well as background refetch.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isFetching`](QueryObserverBaseResult.md#isfetching)
+
+***
+
+### ~~isInitialLoading~~
+
+```ts
+isInitialLoading: boolean;
+```
+
+Defined in: [packages/query-core/src/types.ts:836](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L836)
+
+#### Deprecated
+
+`isInitialLoading` is being deprecated in favor of `isLoading`
+and will be removed in the next major version.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isInitialLoading`](QueryObserverBaseResult.md#isinitialloading)
+
+***
+
+### isLoading
+
+```ts
+isLoading: false;
+```
+
+Defined in: [packages/query-core/src/types.ts:931](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L931)
+
+Is `true` whenever the first fetch for a query is in-flight.
+- Is the same as `isFetching && isPending`.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isLoading`](QueryObserverBaseResult.md#isloading)
+
+***
+
+### isLoadingError
+
+```ts
+isLoadingError: true;
+```
+
+Defined in: [packages/query-core/src/types.ts:932](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L932)
+
+Will be `true` if the query failed while fetching for the first time.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isLoadingError`](QueryObserverBaseResult.md#isloadingerror)
+
+***
+
+### isPaused
+
+```ts
+isPaused: boolean;
+```
+
+Defined in: [packages/query-core/src/types.ts:841](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L841)
+
+A derived boolean from the `fetchStatus` variable, provided for convenience.
+- The query wanted to fetch, but has been `paused`.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isPaused`](QueryObserverBaseResult.md#ispaused)
+
+***
+
+### isPending
+
+```ts
+isPending: false;
+```
+
+Defined in: [packages/query-core/src/types.ts:930](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L930)
+
+Will be `pending` if there's no cached data and no query attempt was finished yet.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isPending`](QueryObserverBaseResult.md#ispending)
+
+***
+
+### isPlaceholderData
+
+```ts
+isPlaceholderData: false;
+```
+
+Defined in: [packages/query-core/src/types.ts:935](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L935)
+
+Will be `true` if the data shown is the placeholder data.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isPlaceholderData`](QueryObserverBaseResult.md#isplaceholderdata)
+
+***
+
+### isRefetchError
+
+```ts
+isRefetchError: false;
+```
+
+Defined in: [packages/query-core/src/types.ts:933](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L933)
+
+Will be `true` if the query failed while refetching.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isRefetchError`](QueryObserverBaseResult.md#isrefetcherror)
+
+***
+
+### isRefetching
+
+```ts
+isRefetching: boolean;
+```
+
+Defined in: [packages/query-core/src/types.ts:854](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L854)
+
+Is `true` whenever a background refetch is in-flight, which _does not_ include initial `pending`.
+- Is the same as `isFetching && !isPending`.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isRefetching`](QueryObserverBaseResult.md#isrefetching)
+
+***
+
+### isStale
+
+```ts
+isStale: boolean;
+```
+
+Defined in: [packages/query-core/src/types.ts:858](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L858)
+
+Will be `true` if the data in the cache is invalidated or if the data is older than the given `staleTime`.
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isStale`](QueryObserverBaseResult.md#isstale)
+
+***
+
+### isSuccess
+
+```ts
+isSuccess: false;
+```
+
+Defined in: [packages/query-core/src/types.ts:934](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L934)
+
+A derived boolean from the `status` variable, provided for convenience.
+- `true` if the query has received a response with no errors and is ready to display its data.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isSuccess`](QueryObserverBaseResult.md#issuccess)
+
+***
+
+### refetch()
+
+```ts
+refetch: (options?) => Promise<QueryObserverResult<TData, TError>>;
+```
+
+Defined in: [packages/query-core/src/types.ts:871](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L871)
+
+A function to manually refetch the query.
+
+#### Parameters
+
+##### options?
+
+[`RefetchOptions`](RefetchOptions.md)
+
+#### Returns
+
+`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
+
+#### Inherited from
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`refetch`](QueryObserverBaseResult.md#refetch)
+
+***
+
+### status
+
+```ts
+status: "error";
+```
+
+Defined in: [packages/query-core/src/types.ts:936](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L936)
+
+The status of the query.
+- Will be:
+  - `pending` if there's no cached data and no query attempt was finished yet.
+  - `error` if the query attempt resulted in an error.
+  - `success` if the query has received a response with no errors and is ready to display its data.
+
+#### Overrides
+
+[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`status`](QueryObserverBaseResult.md#status)