export declare const getIframeDomainName: (iframeOrUrl: string | undefined) => string | null;
export type AllowedIframeAttributes = {
    src?: string;
    allow?: string;
    allowFullscreen?: string;
};
export declare const getAllowedIframeAttributes: (iframeOrUrl: string | undefined) => AllowedIframeAttributes | null;
export declare const isAllowedIframeUrl: (url: string, allowedIframesSetting?: string) => boolean;
