import { OnInit, OnDestroy, EventEmitter, ElementRef } from '@angular/core';
export declare class ClickOutsideDirective implements OnInit, OnDestroy {
    private element;
    private listening;
    private clickSubscription;
    clickOutside: EventEmitter<Object>;
    /**
     * Default constructor.
     *
     * @param element The element that the directive has been added to.
     */
    constructor(element: ElementRef);
    /**
     * Gets triggered when the component is initialized.
     */
    ngOnInit(): void;
    /**
     * Get triggered when the component is destroyed.
     */
    ngOnDestroy(): void;
    /**
     * Checks a global click.
     *
     * @param event The mouse event.
     */
    private onGlobalClick(event);
    /**
     * Checks if the node is a descendant.
     *
     * @param parent The parent element.
     * @param child The child element.
     *
     * @returns If an element is a descendant.
     */
    private isDescendant(parent, child);
}