import { IFRAME_NAME_PREFIX } from "./interfaces";
interface IframeState {
    isVisible: boolean;
}
export declare class IframeController {
    private static readonly DEFAULT_STATE;
    private static readonly HIGHEST_Z_INDEX;
    readonly iframeUrl: string;
    readonly iframeId: string;
    private readonly state;
    private _iframeElement;
    private getZIndex;
    constructor(iframePrefix: IFRAME_NAME_PREFIX, iframeUrl: string, state?: Partial<IframeState>);
    get iframeElement(): HTMLIFrameElement | null;
    get isVisible(): boolean;
    createIframe(): HTMLIFrameElement;
    setIframeVisibility(isVisible: boolean): void;
    updateIframeState(): void;
    focus(): void;
    destroy(): void;
    postMessage(message: unknown): void;
}
export {};