import * as i0 from "@angular/core";
export declare class ScriptLoaderService {
    document: Document;
    private head;
    private alreadyLoaded;
    constructor(document: any);
    private observeLoad;
    private createScriptElement;
    private createCSSElement;
    /**
     * Dynamically loads the given script
     *
     * @param src The url of the script to load dynamically
     * @param integrity set integrity check value
     * @returns Observable<UIEvent> Observable that will be resolved once the script has been loaded.
     */
    loadScript(src: string, integrity?: string): Promise<UIEvent | void>;
    /**
     * Dynamically loads the given CSS file
     *
     * @param href The url of the CSS to load dynamically
     * @returns Observable<UIEvent> Promise that will be resolved once the CSS file has been loaded.
     */
    loadCSS(href: string): Promise<UIEvent | void>;
    static ɵfac: i0.ɵɵFactoryDeclaration<ScriptLoaderService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ScriptLoaderService>;
}