| 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. | |