Add support for formatting options

index.js

@@ -9,6 +9,8 @@
  * @typedef {import('mdast-util-mdx-jsx').MdxJsxExpressionAttribute} MdxJsxExpressionAttribute
  * @typedef {import('mdast-util-mdx-jsx').MdxJsxFlowElement} MdxJsxFlowElement
  * @typedef {import('mdast-util-mdx-jsx').MdxJsxTextElement} MdxJsxTextElement
+ *
+ * @typedef {import('mdast-util-mdx-jsx').ToMarkdownOptions} ToMarkdownOptions
  */
 
 import {
@@ -19,19 +21,21 @@ import {mdxJsxFromMarkdown, mdxJsxToMarkdown} from 'mdast-util-mdx-jsx'
 import {mdxjsEsmFromMarkdown, mdxjsEsmToMarkdown} from 'mdast-util-mdxjs-esm'
 
 /**
- *
  * @return {Array<FromMarkdownExtension>}
  */
 export function mdxFromMarkdown() {
   return [mdxExpressionFromMarkdown, mdxJsxFromMarkdown(), mdxjsEsmFromMarkdown]
 }
 
-/** @return {ToMarkdownExtension} */
-export function mdxToMarkdown() {
+/**
+ * @param {ToMarkdownOptions} [options]
+ * @return {ToMarkdownExtension}
+ */
+export function mdxToMarkdown(options) {
   return {
     extensions: [
       mdxExpressionToMarkdown,
-      mdxJsxToMarkdown(),
+      mdxJsxToMarkdown(options),
       mdxjsEsmToMarkdown
     ]
   }

readme.md

@@ -228,14 +228,14 @@ There is no default export.
 
 ### `mdxFromMarkdown()`
 
-### `mdxToMarkdown()`
+### `mdxToMarkdown(options?)`
 
 Support MDX (or MDX.js).
 The exports are functions that can be called to respectively get an extension
 for [`mdast-util-from-markdown`][from-markdown] and
 [`mdast-util-to-markdown`][to-markdown].
 
-There are no options.
+The options to `mdxToMarkdown` are [passed to `mdxJsxToMarkdown`][options].
 
 ## Related
 
@@ -323,3 +323,5 @@ abide by its terms.
 [mdxjs]: https://github.com/micromark/micromark-extension-mdxjs
 
 [remark-mdx]: https://github.com/mdx-js/mdx/tree/next/packages/remark-mdx
+
+[options]: https://github.com/syntax-tree/mdast-util-mdx-jsx#mdxjsxtomarkdownoptions