export interface QueryObserverOptions<TQueryFnData = unknown, TError = unknown, TData = TQueryFnData, TQueryData = TQueryFnData, TQueryKey extends QueryKey = QueryKey> extends QueryOptions<TQueryFnData, TError, TQueryData, TQueryKey> {
    /**
     * Set this to `false` to disable automatic refetching when the query mounts or changes query keys.
     * To refetch the query, use the `refetch` method returned from the `useQuery` instance.
     * Defaults to `true`.
     */
    enabled?: boolean;
    /**
     * The time in milliseconds after data is considered stale.
     * If set to `Infinity`, the data will never be considered stale.
     */
    staleTime?: number;
    /**
     * If set to a number, the query will continuously refetch at this frequency in milliseconds.
     * If set to a function, the function will be executed with the latest data and query to compute a frequency
     * Defaults to `false`.
     */
    refetchInterval?: number | false | ((data: TData | undefined, query: Query<TQueryFnData, TError, TQueryData, TQueryKey>) => number | false);
    /**
     * If set to `true`, the query will continue to refetch while their tab/window is in the background.
     * Defaults to `false`.
     */
    refetchIntervalInBackground?: boolean;
    /**
     * If set to `true`, the query will refetch on window focus if the data is stale.
     * If set to `false`, the query will not refetch on window focus.
     * If set to `'always'`, the query will always refetch on window focus.
     * If set to a function, the function will be executed with the latest data and query to compute the value.
     * Defaults to `true`.
     */
    refetchOnWindowFocus?: boolean | 'always' | ((query: Query<TQueryFnData, TError, TQueryData, TQueryKey>) => boolean | 'always');
    /**
     * If set to `true`, the query will refetch on reconnect if the data is stale.
     * If set to `false`, the query will not refetch on reconnect.
     * If set to `'always'`, the query will always refetch on reconnect.
     * If set to a function, the function will be executed with the latest data and query to compute the value.
     * Defaults to the value of `networkOnline` (`true`)
     */
    refetchOnReconnect?: boolean | 'always' | ((query: Query<TQueryFnData, TError, TQueryData, TQueryKey>) => boolean | 'always');
    /**
     * If set to `true`, the query will refetch on mount if the data is stale.
     * If set to `false`, will disable additional instances of a query to trigger background refetches.
     * If set to `'always'`, the query will always refetch on mount.
     * If set to a function, the function will be executed with the latest data and query to compute the value
     * Defaults to `true`.
     */
    refetchOnMount?: boolean | 'always' | ((query: Query<TQueryFnData, TError, TQueryData, TQueryKey>) => boolean | 'always');
    /**
     * If set to `false`, the query will not be retried on mount if it contains an error.
     * Defaults to `true`.
     */
    retryOnMount?: boolean;
    /**
     * If set, the component will only re-render if any of the listed properties change.
     * When set to `['data', 'error']`, the component will only re-render when the `data` or `error` properties change.
     * When set to `'all'`, the component will re-render whenever a query is updated.
     * By default, access to properties will be tracked, and the component will only re-render when one of the tracked properties change.
     */
    notifyOnChangeProps?: Array<keyof InfiniteQueryObserverResult> | 'all';
    /**
     * This callback will fire any time the query successfully fetches new data.
     */
    onSuccess?: (data: TData) => void;
    /**
     * This callback will fire if the query encounters an error and will be passed the error.
     */
    onError?: (err: TError) => void;
    /**
     * This callback will fire any time the query is either successfully fetched or errors and be passed either the data or error.
     */
    onSettled?: (data: TData | undefined, error: TError | null) => void;
    /**
     * Whether errors should be thrown instead of setting the `error` property.
     * If set to `true` or `suspense` is `true`, all errors will be thrown to the error boundary.
     * If set to `false` and `suspense` is `false`, errors are returned as state.
     * If set to a function, it will be passed the error and the query, and it should return a boolean indicating whether to show the error in an error boundary (`true`) or return the error as state (`false`).
     * Defaults to `false`.
     */
    useErrorBoundary?: UseErrorBoundary<TQueryFnData, TError, TQueryData, TQueryKey>;
    /**
     * This option can be used to transform or select a part of the data returned by the query function.
     */
    select?: (data: TQueryData) => TData;
    /**
     * If set to `true`, the query will suspend when `status === 'loading'`
     * and throw errors when `status === 'error'`.
     * Defaults to `false`.
     */
    suspense?: boolean;
    /**
     * Set this to `true` to keep the previous `data` when fetching based on a new query key.
     * Defaults to `false`.
     */
    keepPreviousData?: boolean;
    /**
     * If set, this value will be used as the placeholder data for this particular query observer while the query is still in the `loading` data and no initialData has been provided.
     */
    placeholderData?: TQueryData | PlaceholderDataFunction<TQueryData>;
    _optimisticResults?: 'optimistic' | 'isRestoring';