import { WatermarkOptions, DrawPatternResult } from './types';
/**
 * 获取 MutationObserver 对象
 */
export declare function getMutationObserver(): typeof MutationObserver;
/**
 * 获取DataSetKey
 * @param attributeName
 * @returns
 */
export declare function getDataSetKey(attributeName: string): string;
/**
 * 将样式对象转换为字符串
 * @param style
 */
export declare const getStyleStr: (style: object) => string;
/**
 * 获取任意的ID
 * @param prefix
 * @returns
 */
export declare const getRandomId: (prefix?: string) => string;
/**
 * 获取水印挂载节点
 * @param container
 * @param watermarkId
 * @returns
 */
export declare const getContainer: (container: WatermarkOptions['container'], watermarkId: string) => HTMLElement;
export declare const getContent: (watermarkId: string) => HTMLDivElement;
export declare function getDrawPattern(config: WatermarkOptions): Promise<DrawPatternResult>;