export type DownloadStrategy = 'auto' | 'anchor' | 'iframe';
export interface DownloadOptions {
    target?: '_self' | '_blank';
    strategy?: DownloadStrategy;
}
export declare function downloadFile(url: string, fileName?: string, options?: DownloadOptions): Promise<void>;
export declare function toggleDark(): void;
export declare function getParentElement(el: HTMLElement): HTMLElement | null;
export declare function getScrollParent(el: HTMLElement | null): HTMLElement | null;