export declare const DEFAULT_HEIGHT = "480px";
export declare const DEFAULT_WIDTH = 450;
export declare const MIN_WIDTH = 375;
export declare function updateIframeStyle(iframe: HTMLIFrameElement, style: {
    width: number;
}): void;
export declare const getStyleElementIdentifier: () => {
    id: string;
    defaultClassName: string;
    specifiedClassName: string;
};
export declare function destroyStyleElement(): void;