import { ElementRef, AfterViewInit, SimpleChanges, OnChanges } from '@angular/core';
import { Options, TitleFunction } from 'tooltip.js';
export declare class TooltipDirective implements AfterViewInit, OnChanges {
    private elementRef;
    _tooltip: any;
    /**
     * Default tooltip options
     */
    _options: Options;
    /**
     * Set the tooltip title value
     */
    title?: string | HTMLElement | TitleFunction;
    /**
     * Set the tooltip options value
     */
    set options(value: {} | Options);
    /**
     * @ignore
     */
    constructor(elementRef: ElementRef);
    /**
     * Set configurations after view is initializes
     */
    ngAfterViewInit(): void;
    /**
   * Set a new tooltip instance
   * @param value
   */
    private newTooltipInstance;
    ngOnChanges(changes: SimpleChanges): void;
}