Use ESM

.gitignore

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

.prettierignore

@@ -1,5 +1,2 @@
 coverage/
-collapse-white-space.js
-collapse-white-space.min.js
-*.json
 *.md

index.js

@@ -1,8 +1,4 @@
-'use strict'
-
-module.exports = collapse
-
 // `collapse(' \t\nbar \nbaz\t') // ' bar baz '`
-function collapse(value) {
+export function collapseWhiteSpace(value) {
   return String(value).replace(/\s+/g, ' ')
 }

package.json

@@ -18,27 +18,25 @@
   "contributors": [
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
   "files": [
     "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 collapseWhiteSpace -o collapse-white-space.js",
-    "build-mangle": "browserify . -s collapseWhiteSpace -p tinyify -o collapse-white-space.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-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,
@@ -50,20 +48,14 @@
   },
   "xo": {
     "prettier": true,
-    "esnext": false,
-    "ignores": [
-      "collapse-white-space.js"
-    ]
+    "rules": {
+      "no-var": "off",
+      "prefer-arrow-callback": "off"
+    }
   },
   "remarkConfig": {
     "plugins": [
       "preset-wooorm"
     ]
-  },
-  "nyc": {
-    "check-coverage": true,
-    "lines": 100,
-    "functions": 100,
-    "branches": 100
   }
 }

readme.md

@@ -9,6 +9,9 @@ Replace multiple whitespace characters with a single space.
 
 ## 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
@@ -18,14 +21,17 @@ npm install collapse-white-space
 ## Use
 
 ```js
-var collapse = require('collapse-white-space')
+import {collapseWhiteSpace} from 'collapse-white-space'
 
-collapse('\tfoo \n\tbar  \t\r\nbaz') //=> ' foo bar baz'
+collapseWhiteSpace('\tfoo \n\tbar  \t\r\nbaz') //=> ' foo bar baz'
 ```
 
 ## API
 
-### `collapse(value)`
+This package exports the following identifiers: `collapseWhiteSpace`.
+There is no default export.
+
+### `collapseWhiteSpace(value)`
 
 Replace multiple whitespace characters in value with a single space.
 

test.js

@@ -1,14 +1,13 @@
-'use strict'
-
-var test = require('tape')
-var collapse = require('.')
+import test from 'tape'
+import {collapseWhiteSpace} from './index.js'
 
 test('collapseWhiteSpace(value)', function (t) {
-  t.equal(collapse(true), 'true', 'should coerce to string')
+  // @ts-ignore runtime
+  t.equal(collapseWhiteSpace(true), 'true', 'should coerce to string')
 
-  t.equal(collapse(' \t\nbar \nbaz\t'), ' bar baz ')
-  t.equal(collapse('   bar\t\t\tbaz\n\n\n'), ' bar baz ')
-  t.equal(collapse(' \n bar\t\n\tbaz\r\n'), ' bar baz ')
+  t.equal(collapseWhiteSpace(' \t\nbar \nbaz\t'), ' bar baz ')
+  t.equal(collapseWhiteSpace('   bar\t\t\tbaz\n\n\n'), ' bar baz ')
+  t.equal(collapseWhiteSpace(' \n bar\t\n\tbaz\r\n'), ' bar baz ')
 
   t.end()
 })