Use ESM

.gitignore

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

.prettierignore

@@ -1,6 +1,2 @@
-.nyc_output/
 coverage/
 *.md
-*.json
-direction.js
-direction.min.js

cli.js

@@ -1,14 +1,15 @@
 #!/usr/bin/env node
-'use strict'
+import fs from 'fs'
 
-var pack = require('./package.json')
-var direction = require('.')
+import {direction} from './index.js'
+
+var pack = JSON.parse(fs.readFileSync('package.json'))
 
 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()

index.js

@@ -1,26 +1,13 @@
-'use strict'
-
-module.exports = direction
-
-var RTL = '\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC'
-var LTR =
+var rtlRange = '\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC'
+var ltrRange =
   'A-Za-z\u00C0-\u00D6\u00D8-\u00F6' +
   '\u00F8-\u02B8\u0300-\u0590\u0800-\u1FFF\u200E\u2C00-\uFB1C' +
   '\uFE00-\uFE6F\uFEFD-\uFFFF'
 
-var rtl = new RegExp('^[^' + LTR + ']*[' + RTL + ']')
-var ltr = new RegExp('^[^' + RTL + ']*[' + LTR + ']')
-
-function direction(value) {
-  value = String(value || '')
-
-  if (rtl.test(value)) {
-    return 'rtl'
-  }
-
-  if (ltr.test(value)) {
-    return 'ltr'
-  }
+var rtl = new RegExp('^[^' + ltrRange + ']*[' + rtlRange + ']')
+var ltr = new RegExp('^[^' + rtlRange + ']*[' + ltrRange + ']')
 
-  return 'neutral'
+export function direction(value) {
+  var source = String(value || '')
+  return rtl.test(source) ? 'rtl' : ltr.test(source) ? 'ltr' : 'neutral'
 }

package.json

@@ -23,29 +23,27 @@
   "contributors": [
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
   "bin": "cli.js",
   "files": [
     "index.js",
     "cli.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 direction -o direction.js",
-    "build-mangle": "browserify . -s direction -p tinyify -o direction.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"
+    "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"
   },
   "nyc": {
     "check-coverage": true,
@@ -63,14 +61,11 @@
   },
   "xo": {
     "prettier": true,
-    "esnext": false,
     "rules": {
-      "unicorn/no-array-for-each": "off",
-      "unicorn/prefer-includes": "off"
-    },
-    "ignores": [
-      "direction.js"
-    ]
+      "no-var": "off",
+      "prefer-arrow-callback": "off",
+      "unicorn/no-array-for-each": "off"
+    }
   },
   "remarkConfig": {
     "plugins": [

readme.md

@@ -7,34 +7,37 @@
 
 Detect direction: left-to-right, right-to-left, or neutral.
 
-## API
+## Install
 
-Install:
+This package is ESM only: Node 12+ is needed to use it and it must be `import`ed
+instead of `require`d.
 
 ```sh
 npm install direction
 ```
 
-Use:
+## Use
 
 ```js
-var direction = require('direction')
+import {direction} from 'direction'
 
 direction('A') // => 'ltr'
 direction('anglais') // => 'ltr'
 direction('بسيطة') // => 'rtl'
 direction('@') // => 'neutral'
 ```
 
-## CLI
+## API
 
-Install:
+This package exports the following identifiers: `direction`.
+There is no default export.
 
-```sh
-npm install -g direction
-```
+### `direction(value)`
+
+Detect the direction of `value` (`string?`).
+Returns `'ltr'`, `'rtl'`, or `'neutral'`.
 
-Use:
+## CLI
 
 ```txt
 Usage: direction [options] <words...>

test.js

@@ -1,10 +1,10 @@
-'use strict'
+import fs from 'fs'
+import childProcess from 'child_process'
+import {PassThrough} from 'stream'
+import test from 'tape'
+import {direction} from './index.js'
 
-var childProcess = require('child_process')
-var PassThrough = require('stream').PassThrough
-var test = require('tape')
-var pkg = require('./package.json')
-var direction = require('.')
+var pkg = JSON.parse(fs.readFileSync('package.json'))
 
 var fixtures = [
   {input: '0', output: 'neutral'},