import { ElementRef, OnDestroy } from '@angular/core';
import { DomSanitizer, SafeResourceUrl } from '@angular/platform-browser';
import { BrowserRef } from '../services/browser-ref';
import * as i0 from "@angular/core";
export declare class SrcLazyDirective implements OnDestroy {
    private el;
    private srcLazyService;
    private ref;
    constructor(el: ElementRef, srcLazyService: SrcLazyService);
    set srcLazy(src: string | SafeResourceUrl);
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SrcLazyDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<SrcLazyDirective, "[srcLazy]", never, { "srcLazy": "srcLazy"; }, {}, never>;
}
export interface SrcLazyElement {
    el: ElementRef;
    src: string | SafeResourceUrl;
}
export declare class SrcLazyService {
    private sanitize;
    private browserRef;
    private ob;
    private refs;
    constructor(sanitize: DomSanitizer, browserRef: BrowserRef);
    add(srcEl: SrcLazyElement): void;
    del(srcEl: SrcLazyElement): void;
    private setSrc;
    static ɵfac: i0.ɵɵFactoryDeclaration<SrcLazyService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SrcLazyService>;
}