Use ESM

.gitignore

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

.prettierignore

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

build.js

@@ -1,14 +1,12 @@
-'use strict'
-
-var fs = require('fs')
-var https = require('https')
-var concat = require('concat-stream')
-var bail = require('bail')
-var unified = require('unified')
-var html = require('rehype-parse')
-var selectAll = require('hast-util-select').selectAll
-var toString = require('hast-util-to-string')
-var list = require('.')
+import fs from 'fs'
+import https from 'https'
+import concat from 'concat-stream'
+import bail from 'bail'
+import unified from 'unified'
+import html from 'rehype-parse'
+import select from 'hast-util-select'
+import toString from 'hast-util-to-string'
+import {htmlTagNames} from './index.js'
 
 var proc = unified().use(html)
 
@@ -24,15 +22,15 @@ function onw3c(response) {
   response.pipe(concat(onconcat)).on('error', bail)
 
   function onconcat(buf) {
-    var nodes = selectAll('[scope="row"] code', proc.parse(buf))
+    var nodes = select.selectAll('[scope="row"] code', proc.parse(buf))
     var index = -1
     var data
 
     while (++index < nodes.length) {
       data = toString(nodes[index])
 
-      if (data && !/\s/.test(data) && !list.includes(data)) {
-        list.push(data)
+      if (data && !/\s/.test(data) && !htmlTagNames.includes(data)) {
+        htmlTagNames.push(data)
       }
     }
 
@@ -44,7 +42,7 @@ function onwhatwg(response) {
   response.pipe(concat(onconcat)).on('error', bail)
 
   function onconcat(buf) {
-    var nodes = selectAll('tbody th code', proc.parse(buf))
+    var nodes = select.selectAll('tbody th code', proc.parse(buf))
     var index = -1
     var id
     var data
@@ -56,9 +54,9 @@ function onwhatwg(response) {
       if (
         id &&
         id.slice(0, 'elements-3:'.length) === 'elements-3:' &&
-        !list.includes(data)
+        !htmlTagNames.includes(data)
       ) {
-        list.push(data)
+        htmlTagNames.push(data)
       }
     }
 
@@ -70,6 +68,12 @@ function done() {
   count++
 
   if (count === 2) {
-    fs.writeFile('index.json', JSON.stringify(list.sort(), 0, 2) + '\n', bail)
+    fs.writeFile(
+      'index.js',
+      'export var htmlTagNames = ' +
+        JSON.stringify(htmlTagNames.sort(), null, 2) +
+        '\n',
+      bail
+    )
   }
 }

index.js

@@ -0,0 +1,150 @@
+export var htmlTagNames = [
+  'a',
+  'abbr',
+  'acronym',
+  'address',
+  'applet',
+  'area',
+  'article',
+  'aside',
+  'audio',
+  'b',
+  'base',
+  'basefont',
+  'bdi',
+  'bdo',
+  'bgsound',
+  'big',
+  'blink',
+  'blockquote',
+  'body',
+  'br',
+  'button',
+  'canvas',
+  'caption',
+  'center',
+  'cite',
+  'code',
+  'col',
+  'colgroup',
+  'command',
+  'content',
+  'data',
+  'datalist',
+  'dd',
+  'del',
+  'details',
+  'dfn',
+  'dialog',
+  'dir',
+  'div',
+  'dl',
+  'dt',
+  'element',
+  'em',
+  'embed',
+  'fieldset',
+  'figcaption',
+  'figure',
+  'font',
+  'footer',
+  'form',
+  'frame',
+  'frameset',
+  'h1',
+  'h2',
+  'h3',
+  'h4',
+  'h5',
+  'h6',
+  'head',
+  'header',
+  'hgroup',
+  'hr',
+  'html',
+  'i',
+  'iframe',
+  'image',
+  'img',
+  'input',
+  'ins',
+  'isindex',
+  'kbd',
+  'keygen',
+  'label',
+  'legend',
+  'li',
+  'link',
+  'listing',
+  'main',
+  'map',
+  'mark',
+  'marquee',
+  'math',
+  'menu',
+  'menuitem',
+  'meta',
+  'meter',
+  'multicol',
+  'nav',
+  'nextid',
+  'nobr',
+  'noembed',
+  'noframes',
+  'noscript',
+  'object',
+  'ol',
+  'optgroup',
+  'option',
+  'output',
+  'p',
+  'param',
+  'picture',
+  'plaintext',
+  'pre',
+  'progress',
+  'q',
+  'rb',
+  'rbc',
+  'rp',
+  'rt',
+  'rtc',
+  'ruby',
+  's',
+  'samp',
+  'script',
+  'section',
+  'select',
+  'shadow',
+  'slot',
+  'small',
+  'source',
+  'spacer',
+  'span',
+  'strike',
+  'strong',
+  'style',
+  'sub',
+  'summary',
+  'sup',
+  'svg',
+  'table',
+  'tbody',
+  'td',
+  'template',
+  'textarea',
+  'tfoot',
+  'th',
+  'thead',
+  'time',
+  'title',
+  'tr',
+  'track',
+  'tt',
+  'u',
+  'ul',
+  'var',
+  'video',
+  'wbr',
+  'xmp'
+]