import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class ResourceLoaderConfig {
    /**
     * If true, the document.baseURI will be used to build the url of the resource to load if the url is relative.
     */
    useDocumentBaseURI?: boolean;
}
/**
 *  An array of [type, url, attributes] tuple where:
 *  - `type` is the type of an asset to load `script`| `style`
 *  - `url` is the url to a style/script to load
 *  - `attributes` is a map of optional attributes to add to the element.
 */
declare type ResourceInfo = ['style' | 'script', string, Record<string, string>?];
/**
 * Services that dynamically inject scripts and styles elements to the DOM.
 */
export declare class ResourceLoaderService {
    private readonly document;
    private readonly config;
    private readonly requests;
    waitForPendings(): Promise<void>;
    /**
     * Injects styles and scripts from given urls to the head of the DOM.
     * This method loads assets from same url once and the assets are
     * loaded in the same order that given.
     * @param resources Resources to load.
     */
    loadAllSync(resources: ResourceInfo[]): Observable<ResourceInfo[]>;
    /**
     * Injects styles and scripts from given urls to target place in DOM
     * This method loads style and script from same url once.
     * @param resources Resources to load.
     */
    loadAllAsync(resources: ResourceInfo[]): Observable<ResourceInfo[]>;
    private createRequests;
    static ɵfac: i0.ɵɵFactoryDeclaration<ResourceLoaderService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ResourceLoaderService>;
}
export declare const ResourceLoaderConfigProvider: (config: Partial<ResourceLoaderConfig>) => any;
export {};