export type UserVisibilyCallback = ({ isVisible }: {
    isVisible: boolean;
}) => void;
export interface UserVisibilyStrictOptions {
    /**
     * Watch immediately
     * @default true
     */
    immediate: boolean;
    /**
     * Timeout visibility in ms
     * @default 5000 // 5 sec
     */
    timeout: number;
    /**
     * Watch once
     * @default false
     */
    once: boolean;
}
export type UserVisibilyOptions = Partial<UserVisibilyStrictOptions>;
export declare class UserVisibility {
    private readonly callback;
    private eventHandlerFunction;
    private event;
    private timeoutHandler?;
    private options;
    private readonly defaultOptions;
    private isVisible;
    constructor(callback: UserVisibilyCallback, options?: UserVisibilyOptions);
    start(): void;
    private emitCallback;
    private eventHandler;
    private clearTimeout;
    private initTimeout;
    private addEventListener;
    private removeEventListener;
    destroy(): void;
}