import { ElementRef, OnDestroy, OnInit } from '@angular/core';
import { BooleanInput } from '@angular/cdk/coercion';
import { DropdownService } from '../dropdown.service';
import * as i0 from "@angular/core";
export declare class DropdownMenuDirective implements OnInit, OnDestroy {
    elementRef: ElementRef;
    private dropdownService;
    static ngAcceptInputType_dark: BooleanInput;
    constructor(elementRef: ElementRef, dropdownService: DropdownService);
    /**
     * Set alignment of dropdown menu.
     * @type {'start' | 'end' }
     */
    alignment?: 'start' | 'end' | string;
    /**
     * Toggle the visibility of dropdown menu component.
     */
    visible: boolean;
    /**
     * Sets a darker color scheme to match a dark navbar.
     */
    get dark(): boolean;
    set dark(value: boolean);
    private _dark;
    private dropdownStateSubscription;
    get hostClasses(): any;
    get hostStyles(): {
        visibility: string | null;
        display: string | null;
    };
    ngOnInit(): void;
    ngOnDestroy(): void;
    private dropdownStateSubscribe;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropdownMenuDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<DropdownMenuDirective, "[cDropdownMenu]", ["cDropdownMenu"], { "alignment": "alignment"; "visible": "visible"; "dark": "dark"; }, {}, never, never, false>;
}