import { AfterViewInit, ElementRef, Injector, Renderer2 } from "@angular/core";
import { Observable } from "rxjs";
export declare type NHintPlacement = "top" | "left" | "right" | "bottom";
export declare class NHintComponent implements AfterViewInit {
    private el;
    private injector;
    private renderer;
    title$: Observable<string>;
    subtitle$: Observable<string>;
    sideNote$: Observable<string>;
    arrow: ElementRef;
    private targetElement;
    private placement;
    constructor(el: ElementRef, injector: Injector, renderer: Renderer2);
    ngAfterViewInit(): void;
}
export declare class NHintOptions {
    readonly title$: Observable<string>;
    readonly subtitle$: Observable<string>;
    readonly sideNote$: Observable<string>;
    readonly placement: NHintPlacement;
    readonly target: ElementRef;
    constructor(title: Observable<string>, subtitle: Observable<string>, sideNote: Observable<string>, placement: NHintPlacement, target: ElementRef);
}