import { imageManagerOption } from './types/Lazy';
export declare const STATE: {
    loading: number;
    loaded: number;
    error: number;
};
export declare class ImageManager {
    el: HTMLElement;
    src: string;
    state: number;
    loading: string;
    error: string;
    cache: Set<string>;
    constructor(option: imageManagerOption);
    setImageSrc(src?: string): void;
    renderSrc(): void;
    updateSrc(src: string): void;
}