import { Maybe, Either } from "../external/sanctuary/Sanctuary";
export declare const LOADER_TYPE_IMAGE = "image";
export declare enum LoaderImageType {
    URL = "url",
}
export interface LoaderImageRequest {
    url: string;
    __loaderType: string;
}
export interface LoaderImageResponse {
    img?: HTMLImageElement;
    errorEvt?: Event;
    __loaderType: string;
}
export declare type LoaderImageStatus = Maybe<LoaderImageResponse> | Either<LoaderImageResponse>;
export declare type LoaderImageCallback = (resp: Either<LoaderImageResponse>) => void;
export declare class LoaderImage {
    private _status;
    __loaderType: string;
    constructor(_req: Partial<LoaderImageRequest>, callbackAfterLoad?: LoaderImageCallback);
    readonly status: LoaderImageStatus;
}
export declare const loadImagePromise: (_req: Partial<LoaderImageRequest>) => Promise<Either<LoaderImageResponse>>;
export declare const loadImageFactory: (req: Partial<LoaderImageRequest>, callback?: LoaderImageCallback) => LoaderImage;
export declare const isLoaderImage: (arg: any) => arg is LoaderImage;