Use ESM

Author: wooorm

.gitignore

@@ -1,8 +1,5 @@
 .DS_Store
 *.log
-.nyc_output/
 coverage/
 node_modules/
-unist-util-modify-children.js
-unist-util-modify-children.min.js
 yarn.lock

.prettierignore

@@ -1,5 +1,2 @@
 coverage/
-unist-util-modify-children.js
-unist-util-modify-children.min.js
-*.json
 *.md

index.js

@@ -1,20 +1,16 @@
-'use strict'
-
-var iterate = require('array-iterate')
-
-module.exports = modifierFactory
+import {arrayIterate} from 'array-iterate'
 
 // Turn `callback` into a child-modifier accepting a parent.  See
 // `array-iterate` for more info.
-function modifierFactory(callback) {
+export function modifyChildren(callback) {
   return iterator
 
   function iterator(parent) {
     if (!parent || !parent.children) {
       throw new Error('Missing children in `parent` for `modifier`')
     }
 
-    iterate(parent.children, iteratee, parent)
+    arrayIterate(parent.children, iteratee, parent)
   }
 
   // Pass the context as the third argument to `callback`.

package.json

@@ -24,35 +24,33 @@
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
     "Merlijn Vos <merlijn@soverin.net>"
   ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
+  "types": "types/index.d.ts",
   "files": [
     "index.js",
     "types/index.d.ts"
   ],
-  "types": "types/index.d.ts",
   "dependencies": {
-    "array-iterate": "^1.0.0"
+    "array-iterate": "^2.0.0"
   },
   "devDependencies": {
-    "browserify": "^17.0.0",
+    "c8": "^7.0.0",
     "dtslint": "^4.0.0",
-    "nyc": "^15.0.0",
     "prettier": "^2.0.0",
     "remark-cli": "^9.0.0",
     "remark-preset-wooorm": "^8.0.0",
     "tape": "^5.0.0",
-    "tinyify": "^3.0.0",
     "unified": "^9.0.0",
     "xo": "^0.38.0"
   },
   "scripts": {
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
-    "build-bundle": "browserify . -s unistUtilModifyChildren -o unist-util-modify-children.js",
-    "build-mangle": "browserify . -s unistUtilModifyChildren -o unist-util-modify-children.min.js -p tinyify",
-    "build": "npm run build-bundle && npm run build-mangle",
-    "test-api": "node test",
-    "test-coverage": "nyc --reporter lcov tape test.js",
+    "test-api": "node test.js",
+    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov node test.js",
     "test-types": "dtslint types",
-    "test": "npm run format && npm run build && npm run test-coverage && npm run test-types"
+    "test": "npm run format && npm run test-coverage && npm run test-types"
   },
   "prettier": {
     "tabWidth": 2,
@@ -64,17 +62,10 @@
   },
   "xo": {
     "prettier": true,
-    "esnext": false,
-    "ignore": [
-      "types/",
-      "unist-util-modify-children.js"
-    ]
-  },
-  "nyc": {
-    "check-coverage": true,
-    "lines": 100,
-    "functions": 100,
-    "branches": 100
+    "rules": {
+      "no-var": "off",
+      "prefer-arrow-callback": "off"
+    }
   },
   "remarkConfig": {
     "plugins": [

readme.md

@@ -12,6 +12,9 @@ Modify direct children of a parent.
 
 ## 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
@@ -21,8 +24,8 @@ npm install unist-util-modify-children
 ## Use
 
 ```js
-var u = require('unist-builder')
-var modifyChildren = require('unist-util-modify-children')
+import u from 'unist-builder'
+import {modifyChildren} from 'unist-util-modify-children'
 
 var modify = modifyChildren(modifier)
 
@@ -59,6 +62,9 @@ Yields:
 
 ## API
 
+This package exports the following identifiers: `modifyChildren`.
+There is no default export.
+
 ### `modify = modifyChildren(modifier)`
 
 Wrap [`modifier`][modifier] to be invoked for each child in the node given to

test.js

@@ -1,7 +1,5 @@
-'use strict'
-
-var test = require('tape')
-var modifyChildren = require('.')
+import test from 'tape'
+import {modifyChildren} from './index.js'
 
 var noop = Function.prototype
 

types/tslint.json

@@ -1,4 +1,3 @@
-
 {
   "extends": "dtslint/dtslint.json",
   "rules": {