import type { App } from 'vuepress/core';
/**
 * Add tags as customElement
 *
 * 将标签添加为自定义元素
 *
 * @param bundlerOptions - VuePress Bundler config / VuePress 打包器配置
 * @param app - VuePress Node App / VuePress Node 应用
 * @param customElement - Tags recognized as custom element / 识别为自定义元素的标签
 *
 * @example
 * ```ts
 * // Add single custom element
 * addCustomElement(bundlerOptions, app, 'my-element')
 *
 * // Add multiple custom elements
 * addCustomElement(bundlerOptions, app, ['element1', 'element2'])
 *
 * // Add elements matching a pattern
 * addCustomElement(bundlerOptions, app, /^my-/)
 * ```
 */
export declare const addCustomElement: (bundlerOptions: unknown, app: App, customElement: RegExp | string[] | string) => void;