import { ElementRef, OnDestroy, Renderer2 } from '@angular/core';
import { Subject } from 'rxjs';
import { BaseTooltip } from './base-tooltip';
import * as i0 from "@angular/core";
export declare class TooltipActiveDirective implements OnDestroy {
    private readonly el;
    private readonly renderer;
    customClass: string[] | string;
    destroy$: Subject<unknown>;
    constructor(tooltipDirective: BaseTooltip, el: ElementRef, renderer: Renderer2);
    ngOnDestroy(): void;
    private addClass;
    private removeClass;
    static ɵfac: i0.ɵɵFactoryDeclaration<TooltipActiveDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<TooltipActiveDirective, "[auiTooltipActive]", never, { "customClass": { "alias": "auiTooltipActive"; "required": false; }; }, {}, never, never, true, never>;
}