Use ESM

index.js

@@ -1,10 +1,8 @@
-'use strict'
+import h from 'hastscript'
+import select from 'hast-util-select'
+import from from 'hast-util-from-selector'
 
-var h = require('hastscript')
-var $ = require('hast-util-select').select
-var from = require('hast-util-from-selector')
-
-module.exports = meta
+const $ = select.select
 
 var fbBase = 'https://www.facebook.com/'
 
@@ -33,7 +31,7 @@ var generators = [
   twitterCreator
 ]
 
-function meta(options) {
+export default function meta(options) {
   return transform
 
   function transform(tree, file) {

package.json

@@ -30,6 +30,9 @@
   "contributors": [
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
   "files": [
     "index.js"
   ],
@@ -64,8 +67,9 @@
   },
   "xo": {
     "prettier": true,
-    "esnext": false,
     "rules": {
+      "no-var": "off",
+      "prefer-arrow-callback": "off",
       "unicorn/no-fn-reference-in-iterator": "off"
     }
   },

test.js

@@ -1,9 +1,7 @@
-'use strict'
-
-var test = require('tape')
-var rehype = require('rehype')
-var doc = require('rehype-document')
-var meta = require('.')
+import test from 'tape'
+import rehype from 'rehype'
+import doc from 'rehype-document'
+import meta from './index.js'
 
 test('rehype-meta', function (t) {
   t.test('basics', function (st) {
@@ -770,8 +768,7 @@ test('rehype-meta', function (t) {
             'NYC'
           ],
           image: {
-            url:
-              'https://static01.nyt.com/images/2019/12/02/autossell/mta-promo-image/mta-crop-facebookJumbo.jpg',
+            url: 'https://static01.nyt.com/images/2019/12/02/autossell/mta-promo-image/mta-crop-facebookJumbo.jpg',
             alt: 'M.T.A. map designed in 1979',
             width: '1050',
             height: '550'
@@ -857,8 +854,7 @@ test('rehype-meta', function (t) {
             'wedges'
           ],
           image: {
-            url:
-              'https://hostthetoast.com/wp-content/uploads/2014/06/Salt-and-Vinegar-Potatoes-6.jpg',
+            url: 'https://hostthetoast.com/wp-content/uploads/2014/06/Salt-and-Vinegar-Potatoes-6.jpg',
             width: '670',
             height: '1012'
           },