---
id: QueryObserverBaseResult
title: QueryObserverBaseResult
---

Defined in: [packages/query-core/src/types.ts:764](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L764)

## Extended by

- [`QueryObserverPendingResult`](QueryObserverPendingResult.md)
- [`QueryObserverLoadingResult`](QueryObserverLoadingResult.md)
- [`QueryObserverLoadingErrorResult`](QueryObserverLoadingErrorResult.md)
- [`QueryObserverRefetchErrorResult`](QueryObserverRefetchErrorResult.md)
- [`QueryObserverSuccessResult`](QueryObserverSuccessResult.md)
- [`QueryObserverPlaceholderResult`](QueryObserverPlaceholderResult.md)
- [`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md)

## Type Parameters

### TData

`TData` = `unknown`

### TError

`TError` = [`DefaultError`](../type-aliases/DefaultError.md)

## Properties

### data

```ts
data: TData | undefined;
```

Defined in: [packages/query-core/src/types.ts:771](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L771)

The last successfully resolved data for the query.

***

### 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"`.

***

### error

```ts
error: TError | null;
```

Defined in: [packages/query-core/src/types.ts:780](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L780)

The error object for the query, if an error was thrown.
- Defaults to `null`.

***

### 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.

***

### 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"`.

***

### 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.

***

### 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.

***

### 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.

***

### 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.

***

### isError

```ts
isError: boolean;
```

Defined in: [packages/query-core/src/types.ts:804](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L804)

A derived boolean from the `status` variable, provided for convenience.
- `true` if the query attempt resulted in an error.

***

### 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.

***

### 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.

***

### 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.

***

### ~~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.

***

### isLoading

```ts
isLoading: boolean;
```

Defined in: [packages/query-core/src/types.ts:823](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L823)

Is `true` whenever the first fetch for a query is in-flight.
- Is the same as `isFetching && isPending`.

***

### isLoadingError

```ts
isLoadingError: boolean;
```

Defined in: [packages/query-core/src/types.ts:831](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L831)

Will be `true` if the query failed while fetching for the first time.

***

### 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`.

***

### isPending

```ts
isPending: boolean;
```

Defined in: [packages/query-core/src/types.ts:827](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L827)

Will be `pending` if there's no cached data and no query attempt was finished yet.

***

### isPlaceholderData

```ts
isPlaceholderData: boolean;
```

Defined in: [packages/query-core/src/types.ts:845](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L845)

Will be `true` if the data shown is the placeholder data.

***

### isRefetchError

```ts
isRefetchError: boolean;
```

Defined in: [packages/query-core/src/types.ts:849](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L849)

Will be `true` if the query failed while refetching.

***

### 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`.

***

### 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`.

***

### isSuccess

```ts
isSuccess: boolean;
```

Defined in: [packages/query-core/src/types.ts:863](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L863)

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.

***

### 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`\>\>

***

### status

```ts
status: QueryStatus;
```

Defined in: [packages/query-core/src/types.ts:881](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L881)

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.