Use ESM

.gitignore

@@ -1,6 +1,5 @@
 .DS_Store
 *.log
+coverage/
 node_modules/
-character-entities-html4.js
-character-entities-html4.min.js
 yarn.lock

.prettierignore

@@ -1,4 +1,2 @@
-character-entities-html4.js
-character-entities-html4.min.js
-*.json
+coverage/
 *.md

build.js

@@ -1,9 +1,7 @@
-'use strict'
-
-var fs = require('fs')
-var https = require('https')
-var bail = require('bail')
-var concat = require('concat-stream')
+import fs from 'fs'
+import https from 'https'
+import bail from 'bail'
+import concat from 'concat-stream'
 
 https.get('https://www.w3.org/TR/html4/sgml/entities.html', onconnection)
 
@@ -28,7 +26,11 @@ function onconcat(data) {
     match = re.exec(data)
   }
 
-  data = JSON.stringify(entities, null, 2)
-
-  fs.writeFile('index.json', data + '\n', bail)
+  fs.writeFile(
+    'index.js',
+    'export var characterEntitiesHtml4 = ' +
+      JSON.stringify(entities, null, 2) +
+      '\n',
+    bail
+  )
 }

index.js

@@ -0,0 +1,254 @@
+export var characterEntitiesHtml4 = {
+  nbsp: ' ',
+  iexcl: '¡',
+  cent: '¢',
+  pound: '£',
+  curren: '¤',
+  yen: '¥',
+  brvbar: '¦',
+  sect: '§',
+  uml: '¨',
+  copy: '©',
+  ordf: 'ª',
+  laquo: '«',
+  not: '¬',
+  shy: '­',
+  reg: '®',
+  macr: '¯',
+  deg: '°',
+  plusmn: '±',
+  sup2: '²',
+  sup3: '³',
+  acute: '´',
+  micro: 'µ',
+  para: '¶',
+  middot: '·',
+  cedil: '¸',
+  sup1: '¹',
+  ordm: 'º',
+  raquo: '»',
+  frac14: '¼',
+  frac12: '½',
+  frac34: '¾',
+  iquest: '¿',
+  Agrave: 'À',
+  Aacute: 'Á',
+  Acirc: 'Â',
+  Atilde: 'Ã',
+  Auml: 'Ä',
+  Aring: 'Å',
+  AElig: 'Æ',
+  Ccedil: 'Ç',
+  Egrave: 'È',
+  Eacute: 'É',
+  Ecirc: 'Ê',
+  Euml: 'Ë',
+  Igrave: 'Ì',
+  Iacute: 'Í',
+  Icirc: 'Î',
+  Iuml: 'Ï',
+  ETH: 'Ð',
+  Ntilde: 'Ñ',
+  Ograve: 'Ò',
+  Oacute: 'Ó',
+  Ocirc: 'Ô',
+  Otilde: 'Õ',
+  Ouml: 'Ö',
+  times: '×',
+  Oslash: 'Ø',
+  Ugrave: 'Ù',
+  Uacute: 'Ú',
+  Ucirc: 'Û',
+  Uuml: 'Ü',
+  Yacute: 'Ý',
+  THORN: 'Þ',
+  szlig: 'ß',
+  agrave: 'à',
+  aacute: 'á',
+  acirc: 'â',
+  atilde: 'ã',
+  auml: 'ä',
+  aring: 'å',
+  aelig: 'æ',
+  ccedil: 'ç',
+  egrave: 'è',
+  eacute: 'é',
+  ecirc: 'ê',
+  euml: 'ë',
+  igrave: 'ì',
+  iacute: 'í',
+  icirc: 'î',
+  iuml: 'ï',
+  eth: 'ð',
+  ntilde: 'ñ',
+  ograve: 'ò',
+  oacute: 'ó',
+  ocirc: 'ô',
+  otilde: 'õ',
+  ouml: 'ö',
+  divide: '÷',
+  oslash: 'ø',
+  ugrave: 'ù',
+  uacute: 'ú',
+  ucirc: 'û',
+  uuml: 'ü',
+  yacute: 'ý',
+  thorn: 'þ',
+  yuml: 'ÿ',
+  fnof: 'ƒ',
+  Alpha: 'Α',
+  Beta: 'Β',
+  Gamma: 'Γ',
+  Delta: 'Δ',
+  Epsilon: 'Ε',
+  Zeta: 'Ζ',
+  Eta: 'Η',
+  Theta: 'Θ',
+  Iota: 'Ι',
+  Kappa: 'Κ',
+  Lambda: 'Λ',
+  Mu: 'Μ',
+  Nu: 'Ν',
+  Xi: 'Ξ',
+  Omicron: 'Ο',
+  Pi: 'Π',
+  Rho: 'Ρ',
+  Sigma: 'Σ',
+  Tau: 'Τ',
+  Upsilon: 'Υ',
+  Phi: 'Φ',
+  Chi: 'Χ',
+  Psi: 'Ψ',
+  Omega: 'Ω',
+  alpha: 'α',
+  beta: 'β',
+  gamma: 'γ',
+  delta: 'δ',
+  epsilon: 'ε',
+  zeta: 'ζ',
+  eta: 'η',
+  theta: 'θ',
+  iota: 'ι',
+  kappa: 'κ',
+  lambda: 'λ',
+  mu: 'μ',
+  nu: 'ν',
+  xi: 'ξ',
+  omicron: 'ο',
+  pi: 'π',
+  rho: 'ρ',
+  sigmaf: 'ς',
+  sigma: 'σ',
+  tau: 'τ',
+  upsilon: 'υ',
+  phi: 'φ',
+  chi: 'χ',
+  psi: 'ψ',
+  omega: 'ω',
+  thetasym: 'ϑ',
+  upsih: 'ϒ',
+  piv: 'ϖ',
+  bull: '•',
+  hellip: '…',
+  prime: '′',
+  Prime: '″',
+  oline: '‾',
+  frasl: '⁄',
+  weierp: '℘',
+  image: 'ℑ',
+  real: 'ℜ',
+  trade: '™',
+  alefsym: 'ℵ',
+  larr: '←',
+  uarr: '↑',
+  rarr: '→',
+  darr: '↓',
+  harr: '↔',
+  crarr: '↵',
+  lArr: '⇐',
+  uArr: '⇑',
+  rArr: '⇒',
+  dArr: '⇓',
+  hArr: '⇔',
+  forall: '∀',
+  part: '∂',
+  exist: '∃',
+  empty: '∅',
+  nabla: '∇',
+  isin: '∈',
+  notin: '∉',
+  ni: '∋',
+  prod: '∏',
+  sum: '∑',
+  minus: '−',
+  lowast: '∗',
+  radic: '√',
+  prop: '∝',
+  infin: '∞',
+  ang: '∠',
+  and: '∧',
+  or: '∨',
+  cap: '∩',
+  cup: '∪',
+  int: '∫',
+  there4: '∴',
+  sim: '∼',
+  cong: '≅',
+  asymp: '≈',
+  ne: '≠',
+  equiv: '≡',
+  le: '≤',
+  ge: '≥',
+  sub: '⊂',
+  sup: '⊃',
+  nsub: '⊄',
+  sube: '⊆',
+  supe: '⊇',
+  oplus: '⊕',
+  otimes: '⊗',
+  perp: '⊥',
+  sdot: '⋅',
+  lceil: '⌈',
+  rceil: '⌉',
+  lfloor: '⌊',
+  rfloor: '⌋',
+  lang: '〈',
+  rang: '〉',
+  loz: '◊',
+  spades: '♠',
+  clubs: '♣',
+  hearts: '♥',
+  diams: '♦',
+  quot: '"',
+  amp: '&',
+  lt: '<',
+  gt: '>',
+  OElig: 'Œ',
+  oelig: 'œ',
+  Scaron: 'Š',
+  scaron: 'š',
+  Yuml: 'Ÿ',
+  circ: 'ˆ',
+  tilde: '˜',
+  ensp: ' ',
+  emsp: ' ',
+  thinsp: ' ',
+  zwnj: '‌',
+  zwj: '‍',
+  lrm: '‎',
+  rlm: '‏',
+  ndash: '–',
+  mdash: '—',
+  lsquo: '‘',
+  rsquo: '’',
+  sbquo: '‚',
+  ldquo: '“',
+  rdquo: '”',
+  bdquo: '„',
+  dagger: '†',
+  Dagger: '‡',
+  permil: '‰',
+  lsaquo: '‹',
+  rsaquo: '›',
+  euro: '€'
+}