import { ElementRef, Renderer2 } from '@angular/core';
import { MediaObserver } from '@angular/flex-layout';
import { Observable } from 'rxjs';
export declare class MediaQueryClassesDirective {
    private _elementRef;
    private _renderer;
    private _mq;
    prefix: string;
    active: string[];
    activeClasses: string[];
    active$: Observable<string[]>;
    activeClasses$: Observable<string[]>;
    private _subscriptions;
    constructor(_elementRef: ElementRef, _renderer: Renderer2, _mq: MediaObserver);
    ngOnInit(): void;
    ngOnDestroy(): void;
    isActive(value: string | string[]): boolean;
    setActiveClasses(values: string[]): void;
    private toggleClass;
}