import { AfterContentInit, ElementRef, OnChanges, OnDestroy, QueryList, Renderer2 } from '@angular/core';
import { Router } from '@angular/router';
import { NavigationLink } from './navigation-link.directive';
import { NavigationLinkWithHref } from './navigation-link-with-href.directive';
import { Params } from '../interfaces';
export declare class NavigationLinkActive implements OnChanges, OnDestroy, AfterContentInit {
    private router;
    private element;
    private renderer;
    links: QueryList<NavigationLink>;
    linksWithHrefs: QueryList<NavigationLinkWithHref>;
    params: Params;
    navLinkActiveOptions: {
        exact: boolean;
    };
    set navLinkActive(input: string | string[]);
    private isActive;
    private classNames;
    private subscription;
    constructor(router: Router, element: ElementRef, renderer: Renderer2);
    ngAfterContentInit(): void;
    ngOnChanges(): void;
    ngOnDestroy(): void;
    private update;
    private hasActiveLinks;
    private isLinkActive;
}