Use ESM

.gitignore

@@ -1,8 +1,5 @@
 .DS_Store
 *.log
-.nyc_output/
 coverage/
 node_modules/
-unified-message-control.js
-unified-message-control.min.js
 yarn.lock

.prettierignore

@@ -1,5 +1,2 @@
 coverage/
-unified-message-control.js
-unified-message-control.min.js
-*.json
 *.md

index.js

@@ -1,11 +1,7 @@
-'use strict'
+import location from 'vfile-location'
+import visit from 'unist-util-visit'
 
-var location = require('vfile-location')
-var visit = require('unist-util-visit')
-
-module.exports = messageControl
-
-function messageControl(options) {
+export function messageControl(options) {
   var settings = options || {}
   var enable = settings.enable || []
   var disable = settings.disable || []
@@ -173,7 +169,7 @@ function messageControl(options) {
       previousState = getState(ruleId)
 
       if (state !== previousState) {
-        markers.push({state: state, position: pos})
+        markers.push({state, position: pos})
       }
 
       // Toggle all known rules.

package.json

@@ -23,9 +23,13 @@
     "Christian Murphy <christian.murphy.42@gmail.com> (https://github.com/ChristianMurphy)",
     "Thomas 'zemnmez' Shadwell (https://github.com/zemnmez)"
   ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
+  "types": "index.d.ts",
   "files": [
-    "index.js",
-    "index.d.ts"
+    "index.d.ts",
+    "index.js"
   ],
   "dependencies": {
     "unist-util-visit": "^2.0.0",
@@ -35,36 +39,24 @@
     "@types/hast": "^2.0.0",
     "@types/mdast": "^3.0.0",
     "@types/unist": "^2.0.0",
-    "browserify": "^17.0.0",
-    "dtslint": "^4.0.0",
+    "c8": "^7.0.0",
     "mdast-comment-marker": "^1.0.0",
-    "nyc": "^15.0.0",
     "prettier": "^2.0.0",
     "remark": "^13.0.0",
     "remark-cli": "^9.0.0",
     "remark-preset-wooorm": "^8.0.0",
     "remark-toc": "^7.0.0",
     "tape": "^5.0.0",
-    "tinyify": "^3.0.0",
     "unified": "^9.0.0",
     "unist-util-is": "^4.0.0",
-    "xo": "^0.38.0"
+    "xo": "^0.39.0"
   },
   "scripts": {
-    "format": "remark . -qfo && prettier . --write && xo --fix",
-    "build-bundle": "browserify index.js -s unifiedMessageControl -o unified-message-control.js",
-    "build-mangle": "browserify index.js -s unifiedMessageControl -p tinyify -o unified-message-control.min.js",
-    "build": "npm run build-bundle && npm run build-mangle",
-    "test-api": "node test",
-    "test-coverage": "nyc --reporter lcov tape test.js",
-    "test-types": "dtslint",
-    "test": "npm run test-types && npm run format && npm run build && npm run test-coverage"
-  },
-  "nyc": {
-    "check-coverage": true,
-    "lines": 100,
-    "functions": 100,
-    "branches": 100
+    "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
+    "test-api": "node --conditions development test.js",
+    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov node --conditions development test.js",
+    "xxx-test-types": "dtslint",
+    "test": "npm run format && npm run test-coverage"
   },
   "prettier": {
     "tabWidth": 2,
@@ -76,8 +68,9 @@
   },
   "xo": {
     "prettier": true,
-    "esnext": false,
     "rules": {
+      "no-var": "off",
+      "prefer-arrow-callback": "off",
       "guard-for-in": "off",
       "unicorn/explicit-length-check": "off",
       "unicorn/no-array-callback-reference": "off",

readme.md

@@ -12,6 +12,9 @@ Enable, disable, and ignore messages with [**unified**][unified].
 
 ## 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
@@ -59,6 +62,9 @@ example.md: no issues found
 
 ## API
 
+This package exports the following identifiers: `messageControl`.
+There is no default export.
+
 ### `unified.use(control, options)`
 
 Let comment markers control messages from certain sources.