Use ESM

index.js

@@ -1,15 +1,11 @@
-'use strict'
-
-var mdast2hast = require('mdast-util-to-hast')
-
-module.exports = remark2rehype
+import mdast2hast from 'mdast-util-to-hast'
 
 // Attacher.
 // If a destination is given, runs the destination with the new hast tree
 // (bridge mode).
 // Without destination, returns the tree: further plugins run on that tree
 // (mutate mode).
-function remark2rehype(destination, options) {
+export default function remarkRehype(destination, options) {
   if (destination && !destination.process) {
     options = destination
     destination = null

package.json

@@ -26,11 +26,12 @@
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
     "John Otander <johnotander@gmail.com> (https://johno.com)"
   ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
   "files": [
-    "index.js",
-    "types/index.d.ts"
+    "index.js"
   ],
-  "types": "types/index.d.ts",
   "dependencies": {
     "mdast-util-to-hast": "^10.2.0"
   },
@@ -65,6 +66,10 @@
   "xo": {
     "prettier": true,
     "esnext": false,
+    "rules": {
+      "no-var": "off",
+      "prefer-arrow-callback": "off"
+    },
     "ignores": [
       "types/"
     ]

test.js

@@ -1,11 +1,9 @@
-'use strict'
-
-var test = require('tape')
-var unified = require('unified')
-var parse = require('remark-parse')
-var markdown = require('remark-stringify')
-var html = require('rehype-stringify')
-var remark2rehype = require('.')
+import test from 'tape'
+import unified from 'unified'
+import parse from 'remark-parse'
+import markdown from 'remark-stringify'
+import html from 'rehype-stringify'
+import remark2rehype from './index.js'
 
 test('remark2rehype()', function (t) {
   t.equal(