Change to export functions that return extensions

index.js

@@ -18,14 +18,21 @@ import {
 import {mdxJsxFromMarkdown, mdxJsxToMarkdown} from 'mdast-util-mdx-jsx'
 import {mdxjsEsmFromMarkdown, mdxjsEsmToMarkdown} from 'mdast-util-mdxjs-esm'
 
-/** @type {FromMarkdownExtension[]} */
-export const mdxFromMarkdown = [
-  mdxExpressionFromMarkdown,
-  mdxJsxFromMarkdown,
-  mdxjsEsmFromMarkdown
-]
+/**
+ *
+ * @return {Array<FromMarkdownExtension>}
+ */
+export function mdxFromMarkdown() {
+  return [mdxExpressionFromMarkdown, mdxJsxFromMarkdown, mdxjsEsmFromMarkdown]
+}
 
-/** @type {ToMarkdownExtension} */
-export const mdxToMarkdown = {
-  extensions: [mdxExpressionToMarkdown, mdxJsxToMarkdown, mdxjsEsmToMarkdown]
+/** @return {ToMarkdownExtension} */
+export function mdxToMarkdown() {
+  return {
+    extensions: [
+      mdxExpressionToMarkdown,
+      mdxJsxToMarkdown,
+      mdxjsEsmToMarkdown
+    ]
+  }
 }

readme.md

@@ -72,12 +72,12 @@ const doc = fs.readFileSync('example.mdx')
 
 const tree = fromMarkdown(doc, {
   extensions: [mdxjs()],
-  mdastExtensions: [mdxFromMarkdown]
+  mdastExtensions: [mdxFromMarkdown()]
 })
 
 console.log(tree)
 
-const out = toMarkdown(tree, {extensions: [mdxToMarkdown]})
+const out = toMarkdown(tree, {extensions: [mdxToMarkdown()]})
 
 console.log(out)
 ```
@@ -226,13 +226,13 @@ This package exports the following identifier: `mdxFromMarkdown`,
 `mdxToMarkdown`.
 There is no default export.
 
-### `mdxFromMarkdown`
+### `mdxFromMarkdown()`
 
-### `mdxToMarkdown`
+### `mdxToMarkdown()`
 
 Support MDX (or MDX.js).
-The exports are respectively an extension for
-[`mdast-util-from-markdown`][from-markdown] and
+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.

test.js

@@ -10,7 +10,7 @@ test('markdown -> mdast', (t) => {
       JSON.stringify(
         fromMarkdown('import a from "b"', {
           extensions: [mdxjs()],
-          mdastExtensions: [mdxFromMarkdown]
+          mdastExtensions: [mdxFromMarkdown()]
         })
       )
     ),
@@ -95,7 +95,7 @@ test('markdown -> mdast', (t) => {
   t.deepEqual(
     fromMarkdown('<x/>', {
       extensions: [mdxjs()],
-      mdastExtensions: [mdxFromMarkdown]
+      mdastExtensions: [mdxFromMarkdown()]
     }),
     {
       type: 'root',
@@ -124,7 +124,7 @@ test('markdown -> mdast', (t) => {
       JSON.stringify(
         fromMarkdown('{1 + 1}', {
           extensions: [mdxjs()],
-          mdastExtensions: [mdxFromMarkdown]
+          mdastExtensions: [mdxFromMarkdown()]
         })
       )
     ),
@@ -210,7 +210,7 @@ test('mdast -> markdown', (t) => {
   t.equal(
     toMarkdown(
       {type: 'mdxjsEsm', value: 'import a from "b"'},
-      {extensions: [mdxToMarkdown]}
+      {extensions: [mdxToMarkdown()]}
     ),
     'import a from "b"\n',
     'should support esm'
@@ -219,7 +219,7 @@ test('mdast -> markdown', (t) => {
   t.equal(
     toMarkdown(
       {type: 'mdxJsxFlowElement', name: 'x', attributes: [], children: []},
-      {extensions: [mdxToMarkdown]}
+      {extensions: [mdxToMarkdown()]}
     ),
     '<x/>\n',
     'should support jsx'
@@ -228,7 +228,7 @@ test('mdast -> markdown', (t) => {
   t.deepEqual(
     toMarkdown(
       {type: 'mdxFlowExpression', value: '1 + 1'},
-      {extensions: [mdxToMarkdown]}
+      {extensions: [mdxToMarkdown()]}
     ),
     '{1 + 1}\n',
     'should support expressions'
@@ -241,7 +241,7 @@ test('mdast -> markdown', (t) => {
         url: 'tel:123',
         children: [{type: 'text', value: 'tel:123'}]
       },
-      {extensions: [mdxToMarkdown]}
+      {extensions: [mdxToMarkdown()]}
     ),
     '[tel:123](tel:123)\n',
     'should use link (resource) instead of link (auto)'