import { Renderer2, ElementRef } from '@angular/core';
export declare class DropdownDirective {
    private renderer;
    private elementRef;
    active: boolean;
    stateCss: string;
    constructor(renderer: Renderer2, elementRef: ElementRef);
    onDocHostClick($event: any): void;
    onHostClick(): void;
    toggleClass(): void;
    changeHostState(): void;
}