import { ElementRef } from '@angular/core';
/**
 * To judge whether the parent element
 */
export declare const isSelfOrParent: (element: HTMLElement, target: HTMLElement) => boolean;
/**
 * Coerces an ElementRef or an Element into an element.
 * Useful for APIs that can accept either a ref or the native element itself.
 */
export declare function coerceElement<T>(elementOrRef: ElementRef<T> | T): T;