/// <reference types="node" />
import EventEmitter from 'events';
import type { Callback, Debounce } from '../../types';
/**
 * Create a MutationObserver
 */
export declare const mutationEvents: EventEmitter<[never]>;
/**
 * Set parameters for mutationObserver
 */
export declare function setMutationParams(params: MutationObserverInit): void;
/**
 * Monitor scroll window
 */
export declare const globalViewportEvents: EventEmitter<[never]>;
/**
 * Base viewport manager
 */
export interface ViewportManager {
    destroy(): void;
}
/**
 * Creates a manager that monitors changes to the viewport of an element
 *
 * @param element An element
 * @param callback A viewport change callback
 * @param duration Function to debounce a callback or callback delay duration, default is 200
 */
export declare function createViewportManager(element: HTMLElement, callback: Callback, duration?: number | Debounce): ViewportManager;
/**
 * Handler for removing an element from the DOM
 *
 * @param element DOM element being watched
 * @param callback Handler function
 */
export declare function onRemoveFromDOM(element: HTMLElement, callback: Callback): void;
/**
 * Remove an element from the DOM if it exists in the DOM
 *
 * @param element DOM element
 */
export declare function removeFromDOM(element: HTMLElement): void;
type ClassName = string | null | false | undefined;
/**
 * Set classes for an element
 *
 * @param element DOM element
 * @param classNames CSS classes
 */
export declare function setClass(element: HTMLElement, ...classNames: ClassName[]): void;
/**
 * Toggle classes on an element
 *
 * @param element DOM element
 * @param add Flag to add or remove the class
 * @param classNames CSS classes to toggle
 *
 * ```ts
 * // add class 'my-class'
 * toggleClass(element, true, 'my-class')
 *
 * // remove class 'my-class', 'other-class'
 * toggleClass(element, false, 'my-class', 'other-class')
 * ```
 */
export declare function toggleClass(element: HTMLElement, add: boolean, ...classNames: ClassName[]): void;
/**
 * Find DOM element by its id
 *
 * @param id The id of the element to find
 * @param parent The element within which to search
 */
export declare function findById(id: string, parent?: HTMLElement): Element | null;
/**
 * Scroll to a position relative to top left corner of the element
 *
 * @param element DOM element
 * @param top Top offset relative to top left corner of the element
 * @param duration Animation time
 */
export declare function scrollByElementTo(element: HTMLElement, top: number, duration?: number): Promise<void> | undefined;
export {};