/**
 * @description 工具函数
 * @author wangfupeng
 */
import { KatexOptions } from 'katex';
/**
 * 获取随机数字符串
 * @param prefix 前缀
 * @returns 随机数字符串
 */
export declare function genRandomStr(prefix?: string): string;
export declare const katexRender: (str: string, elem: HTMLElement, options?: KatexOptions) => void;
export declare const formulaRender: (value: string, el: HTMLElement, options: {
    katexOptions?: KatexOptions;
    katexRender?: (value: string, el: HTMLElement) => void;
}) => void;