import { OnChanges, SimpleChanges, ElementRef } from '@angular/core';
import { MatAvatarsService } from './mat-avatars.service';
import { AvatarType } from './shared/mat-avatar-config';
import { DomSanitizer, SafeResourceUrl } from '@angular/platform-browser';
export declare const AVATAR_CIRCLE_CLASS: string;
export declare class MatAvatarDirective implements OnChanges {
    private service;
    private sanityze;
    hostClass: string[];
    matAvatar: string | null;
    avatarType: AvatarType | null;
    avatarSrc: string | SafeResourceUrl | null;
    avatarCircle: boolean;
    avatarSize: number;
    avatarSizeEm: number;
    avatarBorder: boolean;
    private isImage;
    private element;
    constructor(ref: ElementRef<HTMLElement>, service: MatAvatarsService, sanityze: DomSanitizer);
    ngOnChanges(changes: SimpleChanges): void;
    private toogleClass;
}