import { HMSLocalVideoTrack, HMSRemoteVideoTrack } from '../../internal';
/**
 * This class is to manager video elements for video tracks.
 * This will handle attaching/detaching when element is in view or out of view.
 * This will also handle selecting appropriate layer when element size changesx
 */
export declare class VideoElementManager {
    private track;
    private readonly TAG;
    private resizeObserver?;
    private intersectionObserver?;
    private videoElements;
    private entries;
    private id;
    constructor(track: HMSLocalVideoTrack | HMSRemoteVideoTrack);
    updateSinks(requestLayer?: boolean): void;
    addVideoElement(videoElement: HTMLVideoElement): Promise<void>;
    removeVideoElement(videoElement: HTMLVideoElement): void;
    getVideoElements(): HTMLVideoElement[];
    private init;
    private handleIntersection;
    private handleResize;
    /**
     *  Taken from
     *  https://stackoverflow.com/a/125106/4321808
     */
    private isElementInViewport;
    private selectMaxLayer;
    cleanup: () => void;
}