import { BehaviorSubject } from 'rxjs';
import * as i0 from "@angular/core";
export declare class HeaderService {
    keyword: string;
    keyword$: BehaviorSubject<string>;
    searchActive: boolean;
    toggleActive(keyword: string, searchActive: boolean): void;
    constructor();
    static ɵfac: i0.ɵɵFactoryDeclaration<HeaderService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<HeaderService>;
}