Use ESM

index.js

@@ -1,13 +1,10 @@
-'use strict'
+import syntax from 'micromark-extension-footnote'
+import fromMarkdown from 'mdast-util-footnote/from-markdown.js'
+import toMarkdown from 'mdast-util-footnote/to-markdown.js'
 
-var syntax = require('micromark-extension-footnote')
-var fromMarkdown = require('mdast-util-footnote/from-markdown')
-var toMarkdown = require('mdast-util-footnote/to-markdown')
 var warningIssued
 
-module.exports = footnotes
-
-function footnotes(options) {
+export default function remarkFootnotes(options) {
   var data = this.data()
 
   // Old remark.

package.json

@@ -25,9 +25,10 @@
   "contributors": [
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
-  "types": "types/index.d.ts",
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
   "files": [
-    "types/index.d.ts",
     "index.js"
   ],
   "dependencies": {
@@ -56,8 +57,7 @@
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
     "test-api": "node --conditions development test/index.js",
     "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov npm run test-api",
-    "test-types": "dtslint types",
-    "test": "npm run format && npm run test-coverage && npm run test-types"
+    "test": "npm run format && npm run test-coverage"
   },
   "prettier": {
     "tabWidth": 2,
@@ -71,6 +71,8 @@
     "prettier": true,
     "esnext": false,
     "rules": {
+      "no-var": "off",
+      "prefer-arrow-callback": "off",
       "unicorn/prefer-optional-catch-binding": "off",
       "complexity": "off",
       "no-self-compare": "off",

test/index.js

@@ -1,17 +1,15 @@
-'use strict'
-
-var fs = require('fs')
-var path = require('path')
-var test = require('tape')
-var u = require('unist-builder')
-var clean = require('unist-util-remove-position')
-var vfile = require('to-vfile')
-var unified = require('unified')
-var parse = require('remark-parse')
-var stringify = require('remark-stringify')
-var remark2rehype = require('remark-rehype')
-var html = require('rehype-stringify')
-var footnotes = require('..')
+import fs from 'fs'
+import path from 'path'
+import test from 'tape'
+import u from 'unist-builder'
+import clean from 'unist-util-remove-position'
+import vfile from 'to-vfile'
+import unified from 'unified'
+import parse from 'remark-parse'
+import stringify from 'remark-stringify'
+import remark2rehype from 'remark-rehype'
+import html from 'rehype-stringify'
+import footnotes from '../index.js'
 
 var base = path.join('test', 'fixtures')