/**
 * Create an extension for `micromark` to enable MDX ESM syntax.
 *
 * @param {Options} options
 *   Configuration (required).
 * @returns {Extension}
 *   Extension for `micromark` that can be passed in `extensions` to enable MDX
 *   ESM syntax.
 */
export function mdxjsEsm(options: Options): Extension
export type Acorn = import('micromark-util-events-to-acorn').Acorn
export type AcornOptions = import('micromark-util-events-to-acorn').AcornOptions
export type Extension = import('micromark-util-types').Extension
export type State = import('micromark-util-types').State
export type TokenizeContext = import('micromark-util-types').TokenizeContext
export type Tokenizer = import('micromark-util-types').Tokenizer
/**
 * Configuration (required).
 */
export type Options = {
  /**
   *   Acorn parser to use (required).
   */
  acorn: Acorn
  /**
   * Configuration for acorn (default: `{ecmaVersion: 2020, locations: true,
   * sourceType: 'module'}`).
   * all fields except `locations` can be set
   */
  acornOptions?: AcornOptions | null | undefined
  /**
   * Whether to add `estree` fields to tokens with results from acorn.
   */
  addResult?: boolean | null | undefined
}