# useIsMutating

```ts
function useIsMutating(filters?, queryClient?): number;
```

Defined in: [preact-query/src/useMutationState.ts:14](https://github.com/TanStack/query/blob/main/packages/preact-query/src/useMutationState.ts#L14)

## Parameters

### filters?

`MutationFilters`\<`unknown`, `Error`, `unknown`, `unknown`\>

### queryClient?

`QueryClient`

## Returns

`number`