import { ElementRef, InjectionToken } from '@angular/core';
import * as i0 from "@angular/core";
export type NgxImageCacheConfig = {
    /**
     * Image to use as a placeholder while loading the main image
     * Recommended to use inlined SVG or a base64 encoded image
     */
    loadingPlaceholder?: string;
    /**
     * Image to use as a placeholder where images fail to load
     * Recommended to use inlined SVG or a base64 encoded image
     */
    brokenPlaceholder?: string;
};
export declare const NGX_IMAGE_CACHE_CONFIG: InjectionToken<NgxImageCacheConfig>;
export type NgxImageCacheConfiguration = {
    /**
     * Max age to cache an image in milliseconds.
     * If set to `0` or a negative number, images will never expire.
     */
    maxAge: number;
    /**
     * Set to `false` to disable memory caching for the image
     * If both `cacheInMemory` and `cacheInIndexedDB` are false,
     * no caching will happen. (You'll still get the loader)
     */
    cacheInMemory: boolean;
    /**
     * Set to `false` to disable indexedDB caching for the image
     * If both `cacheInMemory` and `cacheInIndexedDB` are false,
     * no caching will happen. (You'll still get the loader)
     */
    cacheInIndexedDB: boolean;
};
export declare class NgxImageCacheDirective {
    private readonly element;
    private readonly cacheConfig;
    url: string;
    configuration: NgxImageCacheConfiguration;
    private get el();
    constructor(element: ElementRef, cacheConfig: NgxImageCacheConfig);
    ngOnChanges(): void;
    getCachedImage(): Promise<void>;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgxImageCacheDirective, [null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<NgxImageCacheDirective, "img[ngx-cache]", never, { "url": { "alias": "source"; "required": false; }; "configuration": { "alias": "ngx-cache-config"; "required": false; }; }, {}, never, never, true, never>;
}