import type { ComponentType, ReactElement } from 'react';
import React from 'react';
export type LoaderProps = {
    /** component to render */
    Target: ComponentType | undefined;
    /** component to render when Target is undefined */
    DefaultComponent: ComponentType;
    /** component to render when target is missing, for a grace period, until rendering the default */
    Loader?: ComponentType;
    /** cool-down period (in ms) to show Loader, before showing the default */
    timeout?: number;
};
export declare function LoaderFallback({ Target, Loader, DefaultComponent, timeout }: LoaderProps): ReactElement<unknown, string | React.JSXElementConstructor<any>>;
export type useFallbackOptions = {
    timeout?: number;
    loader?: ReactElement;
};
export declare function useFallback(target: ReactElement | null | undefined, fallback: ReactElement, { timeout, loader }?: useFallbackOptions): ReactElement | null;