import { ElementRef, OnChanges, Renderer2, SimpleChanges } from "@angular/core";
import { HttpClient } from "@angular/common/http";
import { UniversalService } from "../services/universal.service";
import * as i0 from "@angular/core";
export declare class BackgroundDirective implements OnChanges {
    private http;
    private element;
    private renderer;
    private universal;
    background: string;
    backgroundSize: string;
    constructor(http: HttpClient, element: ElementRef, renderer: Renderer2, universal: UniversalService);
    ngOnChanges(changes: SimpleChanges): void;
    private setBackground;
    static ɵfac: i0.ɵɵFactoryDeclaration<BackgroundDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<BackgroundDirective, "[background]", never, { "background": { "alias": "background"; "required": false; }; "backgroundSize": { "alias": "backgroundSize"; "required": false; }; }, {}, never, never, false, never>;
}