import { LitElement } from 'lit';
import { Instance as PopperInstance, Placement } from '@popperjs/core';
import '../../assets/svg/monochrome/help.svg';
export declare class Tooltip extends LitElement {
    private _popperInstance;
    arrowElement: Element | undefined;
    popupElement: HTMLElement | undefined;
    triggerElement: Element | undefined;
    placement: Placement;
    interactive: boolean;
    isOpen: boolean;
    arrowSize: number;
    get popperInstance(): PopperInstance | null;
    static get styles(): import("lit").CSSResult[];
    constructor();
    firstUpdated(): Promise<void>;
    updated(changedProperties: any): void;
    disconnectedCallback(): void;
    render(): import("lit-html").TemplateResult<1>;
}