import { ESLBaseElement } from '../../esl-base-element/core';
import { ESLMediaRuleList } from '../../esl-media-query/core';
/**
 * ESLImage - custom element, that provides flexible ways to include images on web pages.
 * Was originally developed as an alternative to `<picture>` element, but with more features inside.
 *
 * @author Alexey Stsefanovich (ala'n), Yuliya Adamskaya
 */
export declare class ESLImage extends ESLBaseElement {
    static is: string;
    static observedAttributes: string[];
    /** Default container class value */
    static DEFAULT_CONTAINER_CLS: string;
    static readonly STRATEGIES: import("./esl-image-strategies").ESLImageStrategyMap;
    static readonly EMPTY_IMAGE = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
    /** Event that represents ready state of {@link ESLImage} */
    READY_EVENT: string;
    /** Event that represents successfully loaded state of {@link ESLImage} */
    LOAD_EVENT: string;
    /** Event that represents error state of {@link ESLImage} */
    ERROR_EVENT: string;
    alt: string;
    mode: string;
    src: string;
    srcBase: string;
    lazy: 'auto' | 'manual' | 'none' | '';
    lazyTriggered: boolean;
    refreshOnUpdate: boolean;
    innerImageClass: string;
    containerClass: string | null;
    containerClassTarget: string;
    containerClassState: string;
    readonly ready: boolean;
    readonly loaded: boolean;
    readonly error: boolean;
    private _strategy;
    private _innerImg;
    private _srcRules;
    private _currentSrc;
    private _detachLazyTrigger;
    private _shadowImageElement;
    protected connectedCallback(): void;
    protected disconnectedCallback(): void;
    protected attributeChangedCallback(attrName: string, oldVal: string, newVal: string): void;
    get srcRules(): ESLMediaRuleList<string>;
    set srcRules(rules: ESLMediaRuleList<string>);
    get currentSrc(): string;
    get empty(): boolean;
    get canUpdate(): boolean;
    get lazyObservable(): boolean;
    get originalWidth(): number;
    get originalHeight(): number;
    triggerLoad(): void;
    protected changeMode(oldVal: string, newVal: string): void;
    protected update(force?: boolean): void;
    protected updateA11y(): void;
    protected getPath(src: string | undefined): string;
    refresh(): void;
    private syncImage;
    private clearImage;
    get innerImage(): HTMLImageElement | null;
    attachInnerImage(): HTMLImageElement;
    removeInnerImage(): void;
    protected get _shadowImg(): HTMLImageElement;
    protected get _shadowImgError(): boolean;
    private _onLoad;
    private _onError;
    private _onMediaMatchChange;
    private _onReadyState;
    updateContainerClasses(): void;
}
declare global {
    export interface ESLLibrary {
        Image: typeof ESLImage;
    }
    export interface HTMLElementTagNameMap {
        'esl-image': ESLImage;
    }
}