Use ESM

.github/workflows/main.yml

@@ -17,5 +17,5 @@ jobs:
     strategy:
       matrix:
         node:
-          - lts/dubnium
+          - lts/erbium
           - node

.gitignore

@@ -1,6 +1,5 @@
 .DS_Store
 *.log
+coverage/
 node_modules/
-html-void-elements.js
-html-void-elements.min.js
 yarn.lock

.prettierignore

@@ -1,6 +1,2 @@
-.nyc_output/
 coverage/
 *.md
-*.json
-html-void-elements.js
-html-void-elements.min.js

build.js

@@ -1,14 +1,12 @@
-'use strict'
-
-var fs = require('fs')
-var https = require('https')
-var concat = require('concat-stream')
-var unified = require('unified')
-var html = require('rehype-parse')
-var q = require('hast-util-select')
-var toString = require('hast-util-to-string')
-var bail = require('bail')
-var list = require('.')
+import fs from 'fs'
+import https from 'https'
+import concat from 'concat-stream'
+import unified from 'unified'
+import html from 'rehype-parse'
+import q from 'hast-util-select'
+import toString from 'hast-util-to-string'
+import {bail} from 'bail'
+import {htmlVoidElements} from './index.js'
 
 var proc = unified().use(html)
 
@@ -27,10 +25,16 @@ function onconcat(buf) {
   while (++index < nodes.length) {
     value = toString(nodes[index])
 
-    if (value && !/\s/.test(value) && !list.includes(value)) {
-      list.push(value)
+    if (value && !/\s/.test(value) && !htmlVoidElements.includes(value)) {
+      htmlVoidElements.push(value)
     }
   }
 
-  fs.writeFile('index.json', JSON.stringify(list.sort(), 0, 2) + '\n', bail)
+  fs.writeFile(
+    'index.js',
+    'export var htmlVoidElements = ' +
+      JSON.stringify(htmlVoidElements.sort(), null, 2) +
+      '\n',
+    bail
+  )
 }

index.js

@@ -0,0 +1,25 @@
+export var htmlVoidElements = [
+  'area',
+  'base',
+  'basefont',
+  'bgsound',
+  'br',
+  'col',
+  'command',
+  'embed',
+  'frame',
+  'hr',
+  'image',
+  'img',
+  'input',
+  'isindex',
+  'keygen',
+  'link',
+  'menuitem',
+  'meta',
+  'nextid',
+  'param',
+  'source',
+  'track',
+  'wbr'
+]

package.json

@@ -23,13 +23,15 @@
   "contributors": [
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
-  "main": "index.json",
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
   "files": [
-    "index.json"
+    "index.js"
   ],
   "devDependencies": {
-    "bail": "^1.0.0",
-    "browserify": "^17.0.0",
+    "bail": "^2.0.0",
+    "c8": "^7.0.0",
     "concat-stream": "^2.0.0",
     "hast-util-select": "^4.0.0",
     "hast-util-to-string": "^1.0.0",
@@ -38,18 +40,15 @@
     "remark-cli": "^9.0.0",
     "remark-preset-wooorm": "^8.0.0",
     "tape": "^5.0.0",
-    "tinyify": "^3.0.0",
     "unified": "^9.0.0",
     "xo": "^0.38.0"
   },
   "scripts": {
     "generate": "node build",
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
-    "build-bundle": "browserify . -s htmlVoidElements -o html-void-elements.js",
-    "build-mangle": "browserify . -s htmlVoidElements -p tinyify -o html-void-elements.min.js",
-    "build": "npm run build-bundle && npm run build-mangle",
-    "test-api": "node test",
-    "test": "npm run format && npm run build && npm run test-api"
+    "test-api": "node test.js",
+    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov node test.js",
+    "test": "npm run format && npm run test-coverage"
   },
   "prettier": {
     "tabWidth": 2,
@@ -61,13 +60,11 @@
   },
   "xo": {
     "prettier": true,
-    "esnext": false,
     "rules": {
-      "unicorn/no-array-callback-reference": "off"
-    },
-    "ignores": [
-      "html-void-elements.min.js"
-    ]
+      "import/no-mutable-exports": "off",
+      "no-var": "off",
+      "prefer-arrow-callback": "off"
+    }
   },
   "remarkConfig": {
     "plugins": [

readme.md

@@ -1,19 +1,19 @@
 # html-void-elements
 
 [![Build][build-badge]][build]
+[![Coverage][coverage-badge]][coverage]
 [![Downloads][downloads-badge]][downloads]
 [![Size][size-badge]][size]
 
 List of known void HTML elements.
 Includes ancient (such as `nextid` and `basefont`) and modern (such as `img` and
 `meta`) tag names from the HTML living standard.
 
-**Note**: there’s one special case: `menuitem`.
-W3C specifies it to be void, but WHATWG doesn’t.
-I suggest using the void form.
-
 ## Install
 
+This package is ESM only: Node 12+ is needed to use it and it must be `import`ed
+instead of `require`d.
+
 [npm][]:
 
 ```sh
@@ -23,15 +23,16 @@ npm install html-void-elements
 ## Use
 
 ```js
-var htmlVoidElements = require('html-void-elements')
+import {htmlVoidElements} from 'html-void-elements'
 
 console.log(htmlVoidElements)
 ```
 
 Yields:
 
 ```js
-[ 'area',
+[
+  'area',
   'base',
   'basefont',
   'bgsound',
@@ -53,14 +54,18 @@ Yields:
   'param',
   'source',
   'track',
-  'wbr' ]
+  'wbr'
+]
 ```
 
 ## API
 
+This package exports the following identifiers: `htmlVoidElements`.
+There is no default export.
+
 ### `htmlVoidElements`
 
-`Array.<string>` — List of lower-case tag names.
+`string[]` — List of lowercase tag names.
 
 ## License
 
@@ -72,6 +77,10 @@ Yields:
 
 [build]: https://github.com/wooorm/html-void-elements/actions
 
+[coverage-badge]: https://img.shields.io/codecov/c/github/wooorm/html-void-elements.svg
+
+[coverage]: https://codecov.io/github/wooorm/html-void-elements
+
 [downloads-badge]: https://img.shields.io/npm/dm/html-void-elements.svg
 
 [downloads]: https://www.npmjs.com/package/html-void-elements

test.js

@@ -1,7 +1,5 @@
-'use strict'
-
-var test = require('tape')
-var htmlVoidElements = require('.')
+import test from 'tape'
+import {htmlVoidElements} from './index.js'
 
 test('htmlVoidElements', function (t) {
   var index = -1