Typings for react-query package

react-query.d.ts

declare module 'react-query' {

    export type QueryKey = string | Array<string, object>;
    export type QueryKeyFunction = () => QueryKey;

    export type QueryFunction<TReturn> = (...args: any[]) => Promise<TReturn>;

    export type QueryOptions = {
        manual: boolean
        pagination: boolean
        getCanFetchMore: (lastPage: number, allPages: number) => boolean
        staleTime: number;
        retry: boolean | number;
        retryDelay: number;
        suspense: number
        refetchInterval: number | false
        onError: (err) => void;
    }

    export type QueryResult<TReturn> = {
        data: null | TReturn;
        error: null | Error;
        isFetching: boolean;
        isCached: boolean;
        failureCount: number
        isLoading: boolean
        refetch: Function

    }

    export function useQuery<TReturn>(queryKey: QueryKey | QueryKeyFunction, queryFn: QueryFunction<TReturn>, options?: Partial<QueryOptions>): QueryResult<TReturn>;

    export type MutationFunction<TReturn> = (...args) => Promise<TReturn>;

    export type MutationResult<TReturn> = {
        data: TReturn;
        isLoading: boolean;
        error: null | Error
    }

    export function useMutation<TReturn>(mutationFn: MutationFunction<TReturn>): [MutationFunction<TReturn>, MutationResult<TReturn>];

}

@bt4R9 you can use updated version from this PR: DefinitelyTyped/DefinitelyTyped#40312

@lukaszfiszer thanks