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---
id: useIsFetching
title: useIsFetching
---
`useIsFetching` is an optional hook that returns the `number` of the queries that your application is loading or fetching in the background (useful for app-wide loading indicators).
```tsx
import { useIsFetching } from '@tanstack/react-query'
// How many queries are fetching?
const isFetching = useIsFetching()
// How many queries matching the posts prefix are fetching?
const isFetchingPosts = useIsFetching({ queryKey: ['posts'] })
```
**Options**
- `filters?: QueryFilters`: [Query Filters](../../guides/filters.md#query-filters)
- `queryClient?: QueryClient`,
- Use this to use a custom QueryClient. Otherwise, the one from the nearest context will be used.
**Returns**
- `isFetching: number`
- Will be the `number` of the queries that your application is currently loading or fetching in the background.
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