import { Observable } from 'rxjs';
import type { TippyElement } from '@ngneat/helipopper/config';
export declare const enum TippyErrorCode {
    TippyNotProvided = 1
}
export declare function inView(host: TippyElement, options?: IntersectionObserverInit): Observable<unknown>;
export declare function isElementOverflow(host: HTMLElement): boolean;
export declare function overflowChanges(host: TippyElement): Observable<boolean>;
export declare function dimensionsChanges(target: HTMLElement): Observable<boolean>;
export declare function onlyTippyProps(allProps: any): any;
export declare function normalizeClassName(className: string | string[]): string[];
export declare function coerceCssPixelValue<T>(value: T): string;
export declare function observeVisibility(host: Element, hiddenHandler: () => void): () => void;