Change to require Node.js 16

Author: wooorm

lib/core.js

@@ -55,9 +55,6 @@ import {h} from 'hastscript'
 import {parseEntities} from 'parse-entities'
 import {Prism} from './prism-core.js'
 
-// To do: next major, use `Object.hasOwn`.
-const own = {}.hasOwnProperty
-
 // Inherit.
 function Refractor() {}
 
@@ -111,7 +108,7 @@ function highlight(value, language) {
       throw new TypeError('Expected `string` for `name`, got `' + name + '`')
     }
 
-    if (own.call(refractor.languages, name)) {
+    if (Object.hasOwn(refractor.languages, name)) {
       grammar = refractor.languages[name]
     } else {
       throw new Error('Unknown language: `' + name + '` is not registered')
@@ -140,7 +137,7 @@ function register(syntax) {
   }
 
   // Do not duplicate registrations.
-  if (!own.call(refractor.languages, syntax.displayName)) {
+  if (!Object.hasOwn(refractor.languages, syntax.displayName)) {
     syntax(refractor)
   }
 }
@@ -172,7 +169,7 @@ function alias(language, alias) {
   let key
 
   for (key in map) {
-    if (own.call(map, key)) {
+    if (Object.hasOwn(map, key)) {
       const value = map[key]
       const list = typeof value === 'string' ? [value] : value
       let index = -1
@@ -199,7 +196,7 @@ function registered(aliasOrLanguage) {
     )
   }
 
-  return own.call(refractor.languages, aliasOrLanguage)
+  return Object.hasOwn(refractor.languages, aliasOrLanguage)
 }
 
 /**
@@ -217,7 +214,7 @@ function listLanguages() {
 
   for (language in languages) {
     if (
-      own.call(languages, language) &&
+      Object.hasOwn(languages, language) &&
       typeof languages[language] === 'object'
     ) {
       list.push(language)
@@ -310,7 +307,7 @@ function attributes(record) {
   let key
 
   for (key in record) {
-    if (own.call(record, key)) {
+    if (Object.hasOwn(record, key)) {
       record[key] = parseEntities(record[key])
     }
   }

readme.md

@@ -90,7 +90,7 @@ You can play with refractor on the
 ## Install
 
 This package is [ESM only][github-gist-esm].
-In Node.js (version 14+),
+In Node.js (version 16+),
 install with [npm][npmjs-install]:
 
 ```sh
@@ -727,7 +727,7 @@ to get Prism Dark from [`esm.sh`][esmsh]:
 
 This package is at least compatible with all maintained versions of Node.js.
 As of now,
-that is Node.js 14+.
+that is Node.js 16+.
 It also works in Deno and modern browsers.
 
 Only the custom built syntaxes in `refractor/lang/*.js` will work with

tsconfig.json

@@ -6,11 +6,10 @@
     "declaration": true,
     "emitDeclarationOnly": true,
     "exactOptionalPropertyTypes": true,
-    "lib": ["dom", "es2020"],
+    "lib": ["dom", "es2022"],
     "module": "node16",
-    "skipLibCheck": true,
     "strict": true,
-    "target": "es2020"
+    "target": "es2022"
   },
   "exclude": ["coverage/", "lang/", "node_modules/"],
   "include": ["**/*.js"]