import { ElementRef } from '@angular/core';
import { Destroyable } from '@ts-core/common';
export declare class AssetBackgroundDirective extends Destroyable {
    private element;
    isUrl: boolean;
    isIcon: boolean;
    isImage: boolean;
    repeat: string;
    extension: string;
    private _background;
    constructor(element: ElementRef);
    private getUrl;
    destroy(): void;
    set background(value: string);
    get background(): string;
}