export interface ExternalAssets {
    styles?: string[];
    scripts?: string[];
}
export declare function loadStyleOnce(href: string): Promise<void>;
export declare function loadScriptOnce(src: string): Promise<void>;
export declare function loadAssetsOnce(assets: ExternalAssets): Promise<void>;
export declare function useExternalAssets(assets: ExternalAssets | null): {
    loading: boolean;
    error: Error | null;
    ready: boolean;
};