import 'intersection-observer';
export declare class UcImage {
    el: HTMLElement;
    observer: IntersectionObserver;
    /**
     * CSS class(es) to be added on the <img> tag inside the <picture> element.
     */
    dataClass: string;
    /**
     * Image alt text.
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-alt
     */
    dataAlt: string;
    /**
     * Image height.
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-height
     */
    dataHeight: string | number;
    /**
     * Image URL. The value of this prop will be set on img tag's src attribute.
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-src
     */
    dataSrc: string;
    /**
     * srcset for img tag.
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-srcset
     */
    dataSrcset: string;
    /**
     * sizes for img tag.
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-sizes
     */
    dataSizes: string;
    /**
     * Image width.
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-width
     */
    dataWidth: string | number;
    componentDidLoad(): void;
    onIntersection(entries: any): Promise<void>;
    setSrc(element: any): void;
    render(): any;
}