import { RanElement } from '@/utils/index';
export declare class ImageElement extends RanElement {
    static get observedAttributes(): string[];
    _image: HTMLImageElement | undefined;
    _container: Element;
    _shadowDom: ShadowRoot;
    constructor();
    get fallback(): string;
    set fallback(value: string);
    get sheet(): string;
    set sheet(value: string);
    /**
     * Alternative text forwarded to the inner `<img>`. Defaults to `''` (empty),
     * which marks the image decorative so screen readers skip it — better than a
     * missing alt, where they announce the file name/URL. Set a description for
     * meaningful images.
     */
    get alt(): string;
    set alt(value: string);
    handlerExternalCss: () => void;
    listenFallback(name: string, value: string | null): void;
    /**
     * Point the inner `<img>` at the current `src` attribute. The `error`/`load`
     * listeners wired in `connectedCallback` stay attached, so this reuses the
     * same fallback-on-error and append-on-load behavior for every src change.
     */
    updateSrc: () => void;
    connectedCallback(): void;
    attributeChangedCallback(name: string, oldValue: string | null, newValue: string | null): void;
}
export default ImageElement;