Use ESM

.gitignore

@@ -1,8 +1,5 @@
 .DS_Store
 *.log
-.nyc_output/
 coverage/
 node_modules/
-hast-util-from-parse5.js
-hast-util-from-parse5.min.js
 yarn.lock

.prettierignore

@@ -1,6 +1,3 @@
 coverage/
-hast-util-from-parse5.js
-hast-util-from-parse5.min.js
 *.html
-*.json
 *.md

index.js

@@ -1,14 +1,7 @@
-'use strict'
-
-var s = require('hastscript/svg')
-var h = require('hastscript')
-var find = require('property-information/find')
-var html = require('property-information/html')
-var svg = require('property-information/svg')
-var vfileLocation = require('vfile-location')
-var ns = require('web-namespaces')
-
-module.exports = wrapper
+import {h, s} from 'hastscript'
+import {html, svg, find} from 'property-information'
+import vfileLocation from 'vfile-location'
+import {webNamespaces} from 'web-namespaces'
 
 var own = {}.hasOwnProperty
 
@@ -22,7 +15,7 @@ var map = {
 }
 
 // Wrapper to normalise options.
-function wrapper(ast, options) {
+export function fromParse5(ast, options) {
   var settings = options || {}
   var file
 
@@ -35,7 +28,7 @@ function wrapper(ast, options) {
 
   return transform(ast, {
     schema: settings.space === 'svg' ? svg : html,
-    file: file,
+    file,
     verbose: settings.verbose
   })
 }
@@ -49,7 +42,7 @@ function transform(ast, config) {
   var position
 
   if (fn === element) {
-    config.schema = ast.namespaceURI === ns.svg ? svg : html
+    config.schema = ast.namespaceURI === webNamespaces.svg ? svg : html
   }
 
   if (ast.childNodes) {
@@ -89,7 +82,7 @@ function nodes(children, config) {
 function root(ast, children, config) {
   var result = {
     type: 'root',
-    children: children,
+    children,
     data: {quirksMode: ast.mode === 'quirks' || ast.mode === 'limited-quirks'}
   }
   var doc
@@ -154,7 +147,7 @@ function element(ast, children, config) {
     result.content = transform(ast.content, config)
 
     if ((start || end) && config.file) {
-      result.content.position = {start: start, end: end}
+      result.content.position = {start, end}
     }
   }
 
@@ -181,7 +174,11 @@ function location(node, location, config) {
       props = {}
 
       for (key in location.attrs) {
-        props[find(config.schema, key).property] = position(location.attrs[key])
+        if (own.call(location.attrs, key)) {
+          props[find(config.schema, key).property] = position(
+            location.attrs[key]
+          )
+        }
       }
 
       node.data = {
@@ -208,7 +205,7 @@ function position(loc) {
     column: loc.endCol,
     offset: loc.endOffset
   })
-  return start || end ? {start: start, end: end} : null
+  return start || end ? {start, end} : null
 }
 
 function point(point) {

package.json

@@ -23,44 +23,39 @@
   "contributors": [
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
+  "types": "types/index.d.ts",
   "files": [
-    "index.js",
-    "types/index.d.ts"
+    "types/index.d.ts",
+    "index.js"
   ],
-  "types": "types/index.d.ts",
   "dependencies": {
-    "@types/parse5": "^5.0.0",
-    "hastscript": "^6.0.0",
-    "property-information": "^5.0.0",
+    "@types/parse5": "^6.0.0",
+    "hastscript": "^7.0.0",
+    "property-information": "^6.0.0",
     "vfile": "^4.0.0",
     "vfile-location": "^3.2.0",
-    "web-namespaces": "^1.0.0"
+    "web-namespaces": "^2.0.0"
   },
   "devDependencies": {
-    "browserify": "^17.0.0",
-    "dtslint": "^4.0.0",
-    "is-hidden": "^1.0.0",
-    "not": "^0.1.0",
-    "nyc": "^15.0.0",
+    "c8": "^7.0.0",
+    "is-hidden": "^2.0.0",
     "parse5": "^6.0.0",
     "prettier": "^2.0.0",
     "remark-cli": "^9.0.0",
     "remark-preset-wooorm": "^8.0.0",
     "tape": "^5.0.0",
-    "tinyify": "^3.0.0",
     "to-vfile": "^6.0.0",
-    "unist-util-visit": "^2.0.0",
-    "xo": "^0.38.0"
+    "unist-util-visit": "^3.0.0",
+    "xo": "^0.39.0"
   },
   "scripts": {
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
-    "build-bundle": "browserify index.js -s hastUtilFromParse5 -o hast-util-from-parse5.js",
-    "build-mangle": "browserify index.js -s hastUtilFromParse5 -o hast-util-from-parse5.min.js -p tinyify",
-    "build": "npm run build-bundle && npm run build-mangle",
-    "test-api": "node test",
-    "test-coverage": "nyc --reporter lcov tape test",
-    "test-types": "dtslint types",
-    "test": "npm run format && npm run build && npm run test-coverage && npm run test-types"
+    "test-api": "node test/index.js",
+    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov node test/index.js",
+    "test": "npm run format && npm run test-coverage"
   },
   "prettier": {
     "tabWidth": 2,
@@ -72,23 +67,14 @@
   },
   "xo": {
     "prettier": true,
-    "esnext": false,
     "rules": {
-      "unicorn/no-fn-reference-in-iterator": "off",
-      "unicorn/prefer-optional-catch-binding": "off",
-      "guard-for-in": "off"
+      "no-var": "off",
+      "prefer-arrow-callback": "off"
     },
     "ignores": [
-      "hast-util-from-parse5.js",
-      "**/*.ts"
+      "types/"
     ]
   },
-  "nyc": {
-    "check-coverage": true,
-    "lines": 100,
-    "functions": 100,
-    "branches": 100
-  },
   "remarkConfig": {
     "plugins": [
       "preset-wooorm"

readme.md

@@ -13,6 +13,9 @@
 
 ## Install
 
+This package is [ESM only](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c):
+Node 12+ is needed to use it and it must be `import`ed instead of `require`d.
+
 [npm][]:
 
 ```sh
@@ -30,10 +33,10 @@ Say we have the following file, `example.html`:
 And our script, `example.js`, looks as follows:
 
 ```js
-var vfile = require('to-vfile')
-var parse5 = require('parse5')
-var inspect = require('unist-util-inspect')
-var fromParse5 = require('hast-util-from-parse5')
+import vfile from 'to-vfile'
+import parse5 from 'parse5'
+import {inspect} from 'unist-util-inspect'
+import {fromParse5} from 'hast-util-from-parse5'
 
 var file = vfile.readSync('example.html')
 var p5ast = parse5.parse(String(file), {sourceCodeLocationInfo: true})
@@ -68,6 +71,9 @@ root[2] (1:1-2:1, 0-70)
 
 ## API
 
+This package exports the following identifiers: `fromParse5`.
+There is no default export.
+
 ### `fromParse5(ast[, file|options])`
 
 Transform [Parse5’s AST][ast] to a [**hast**][hast] [*tree*][tree].

test/fixtures/attributes/index.json

@@ -22,10 +22,7 @@
               "tagName": "p",
               "properties": {
                 "id": "foo",
-                "className": [
-                  "bar",
-                  "baz"
-                ],
+                "className": ["bar", "baz"],
                 "dataQux": "quux"
               },
               "children": [],

test/index.js

@@ -1,15 +1,12 @@
-'use strict'
-
-var fs = require('fs')
-var path = require('path')
-var assert = require('assert')
-var test = require('tape')
-var not = require('not')
-var hidden = require('is-hidden')
-var vfile = require('to-vfile')
-var parse5 = require('parse5')
-var visit = require('unist-util-visit')
-var fromParse5 = require('..')
+import fs from 'fs'
+import path from 'path'
+import assert from 'assert'
+import test from 'tape'
+import {isHidden} from 'is-hidden'
+import parse5 from 'parse5'
+import {visit} from 'unist-util-visit'
+import vfile from 'to-vfile'
+import {fromParse5} from '../index.js'
 
 var join = path.join
 
@@ -348,11 +345,13 @@ test('hast-util-from-parse5', function (t) {
 
 test('fixtures', function (t) {
   var base = join('test', 'fixtures')
-  var files = fs.readdirSync(base).filter(not(hidden))
+  var files = fs.readdirSync(base)
   var index = -1
 
   while (++index < files.length) {
-    each(files[index])
+    if (!isHidden(files[index])) {
+      each(files[index])
+    }
   }
 
   t.end()
@@ -366,14 +365,14 @@ test('fixtures', function (t) {
 
       st.plan(4)
 
-      checkYesYes(st, fixture, options)
-      checkNoYes(st, fixture, options)
-      checkYesNo(st, fixture, options)
-      checkNoNo(st, fixture, options)
+      checkYesYes(st, options)
+      checkNoYes(st, options)
+      checkYesNo(st, options)
+      checkNoNo(st, options)
     })
   }
 
-  function checkYesYes(t, fixture, options) {
+  function checkYesYes(t, options) {
     var input = parse5.parse(String(options.file), {
       sourceCodeLocationInfo: true
     })
@@ -382,7 +381,7 @@ test('fixtures', function (t) {
 
     try {
       expected = JSON.parse(fs.readFileSync(options.out))
-    } catch (_) {
+    } catch {
       // New fixture.
       fs.writeFileSync(options.out, JSON.stringify(actual, 0, 2) + '\n')
       return
@@ -392,7 +391,7 @@ test('fixtures', function (t) {
     t.deepEqual(actual, expected, 'p5 w/ position, hast w/ intent of position')
   }
 
-  function checkNoYes(t, fixture, options) {
+  function checkNoYes(t, options) {
     var input = parse5.parse(String(options.file))
     var actual = fromParse5(input, {file: options.file, verbose: true})
     var expected = JSON.parse(fs.readFileSync(options.out))
@@ -403,7 +402,7 @@ test('fixtures', function (t) {
     t.deepEqual(actual, expected, 'p5 w/o position, hast w/ intent of position')
   }
 
-  function checkYesNo(t, fixture, options) {
+  function checkYesNo(t, options) {
     var input = parse5.parse(String(options.file), {
       sourceCodeLocationInfo: true
     })
@@ -416,7 +415,7 @@ test('fixtures', function (t) {
     t.deepEqual(actual, expected, 'p5 w/ position, hast w/o intent of position')
   }
 
-  function checkNoNo(t, fixture, options) {
+  function checkNoNo(t, options) {
     var input = parse5.parse(String(options.file))
     var actual = fromParse5(input)
     var expected = JSON.parse(fs.readFileSync(options.out))
@@ -452,7 +451,7 @@ function cleaner(node) {
 function log(label, actual, expected) {
   try {
     assert.deepStrictEqual(actual, expected, label)
-  } catch (_) {
+  } catch {
     console.log('actual:%s:', label)
     console.dir(actual, {depth: null})
     console.log('expected:%s:', label)