Use ESM

.gitignore

@@ -1,8 +1,5 @@
 .DS_Store
 *.log
-.nyc_output/
 coverage/
 node_modules/
-lancaster-stemmer.js
-lancaster-stemmer.min.js
 yarn.lock

.prettierignore

@@ -1,4 +1,2 @@
 coverage/
-lancaster-stemmer.js
-lancaster-stemmer.min.js
 *.md

cli.js

@@ -1,14 +1,16 @@
 #!/usr/bin/env node
-'use strict'
-
-var pack = require('./package.json')
-var stemmer = require('.')
+import {URL} from 'url'
+import fs from 'fs'
+import {lancasterStemmer} from './index.js'
 
+var pack = JSON.parse(
+  String(fs.readFileSync(new URL('./package.json', import.meta.url)))
+)
 var argv = process.argv.slice(2)
 
-if (argv.indexOf('--help') !== -1 || argv.indexOf('-h') !== -1) {
+if (argv.includes('--help') || argv.includes('-h')) {
   console.log(help())
-} else if (argv.indexOf('--version') !== -1 || argv.indexOf('-v') !== -1) {
+} else if (argv.includes('--version') || argv.includes('-v')) {
   console.log(pack.version)
 } else if (argv.length === 0) {
   process.stdin.resume()
@@ -23,7 +25,7 @@ if (argv.indexOf('--help') !== -1 || argv.indexOf('-h') !== -1) {
 function stem(values) {
   return values
     .split(/\s+/g)
-    .map((d) => stemmer(d))
+    .map((d) => lancasterStemmer(d))
     .join(' ')
 }
 

index.js

@@ -1,7 +1,5 @@
 'use strict'
 
-module.exports = lancasterStemmer
-
 var stop = -1
 var intact = 0
 var cont = 1
@@ -165,7 +163,7 @@ var rules = {
   ]
 }
 
-function lancasterStemmer(value) {
+export function lancasterStemmer(value) {
   return applyRules(String(value).toLowerCase(), true)
 }
 

package.json

@@ -22,36 +22,27 @@
   "contributors": [
     "Titus Wormer <[email protected]> (https://wooorm.com)"
   ],
+  "sideEffects": false,
+  "type": "module",
+  "bin": "cli.js",
+  "main": "index.js",
   "files": [
     "index.js",
     "cli.js"
   ],
-  "bin": "cli.js",
-  "main": "index.js",
   "devDependencies": {
-    "browserify": "^17.0.0",
-    "nyc": "^15.0.0",
+    "c8": "^7.0.0",
     "prettier": "^2.0.0",
     "remark-cli": "^9.0.0",
     "remark-preset-wooorm": "^8.0.0",
     "tape": "^5.0.0",
-    "tinyify": "^3.0.0",
     "xo": "^0.38.0"
   },
   "scripts": {
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
-    "build-bundle": "browserify . -s lancasterStemmer -o lancaster-stemmer.js",
-    "build-mangle": "browserify . -s lancasterStemmer -p tinyify -o lancaster-stemmer.min.js",
-    "build": "npm run build-bundle && npm run build-mangle",
-    "test-api": "node test",
-    "test-coverage": "nyc --reporter lcov tape test.js",
-    "test": "npm run format && npm run build && npm run test-coverage"
-  },
-  "nyc": {
-    "check-coverage": true,
-    "lines": 100,
-    "functions": 100,
-    "branches": 100
+    "test-api": "node test.js",
+    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov node test.js",
+    "test": "npm run format && npm run test-coverage"
   },
   "prettier": {
     "tabWidth": 2,
@@ -63,15 +54,11 @@
   },
   "xo": {
     "prettier": true,
-    "esnext": false,
     "rules": {
-      "unicorn/prefer-includes": "off",
-      "unicorn/prefer-starts-ends-with": "off",
-      "capitalized-comments": "off"
-    },
-    "ignores": [
-      "lancaster-stemmer.js"
-    ]
+      "capitalized-comments": "off",
+      "no-var": "off",
+      "prefer-arrow-callback": "off"
+    }
   },
   "remarkConfig": {
     "plugins": [

readme.md

@@ -9,6 +9,9 @@
 
 ## Install
 
+This package is ESM only: Node 12+ is needed to use it and it must be `import`ed
+instead of `require`d.
+
 [npm][]:
 
 ```sh
@@ -17,8 +20,11 @@ npm install lancaster-stemmer
 
 ## API
 
+This package exports the following identifiers: `lancasterStemmer`.
+There is no default export.
+
 ```js
-var lancasterStemmer = require('lancaster-stemmer')
+import {lancasterStemmer} from 'lancaster-stemmer'
 
 lancasterStemmer('considerations') // => 'consid'
 lancasterStemmer('detestable') // => 'detest'