import { Configuration } from '../models/public/configuration';
import { DataItem } from '../models/public/data-item';
export declare class DomTooltip {
    private readonly containerEl;
    private readonly el;
    private visible;
    private lastContent;
    /**
     * @param containerEl - The chart's own container element. Tooltip is appended here.
     * @param instanceId - Debug identifier (e.g. "bcjs_a3f9"). Never used in querySelector.
     * @param config - Chart configuration for tooltip styling.
     */
    constructor(containerEl: HTMLElement, instanceId: string, config: Configuration);
    show(item: DataItem, clientX: number, clientY: number, config: Configuration): void;
    hide(): void;
    isVisible(): boolean;
    dispose(): void;
    private buildContent;
}