feat: esm (#80)

BREAKING CHANGE: ESM only

README.md

@@ -30,8 +30,8 @@ This package should be used with [bittorrent-protocol](https://www.npmjs.com/pac
 Say you're already using `bittorrent-protocol`. Your code might look something like this:
 
 ```js
-const Protocol = require('bittorrent-protocol')
-const net = require('net')
+import Protocol from 'bittorrent-protocol'
+import net from 'net'
 
 net.createServer(socket => {
   var wire = new Protocol()
@@ -48,9 +48,9 @@ net.createServer(socket => {
 To add support for BEP 9, simply modify your code like this:
 
 ```js
-const Protocol = require('bittorrent-protocol')
-const net = require('net')
-const ut_metadata = require('ut_metadata')
+import Protocol from 'bittorrent-protocol'
+import net from 'net'
+import ut_metadata from 'ut_metadata'
 
 net.createServer(socket => {
   const wire = new Protocol()

index.js

@@ -1,15 +1,17 @@
 /*! ut_metadata. MIT License. WebTorrent LLC <https://webtorrent.io/opensource> */
-const { EventEmitter } = require('events')
-const bencode = require('bencode')
-const BitField = require('bitfield').default
-const debug = require('debug')('ut_metadata')
-const sha1 = require('simple-sha1')
+import { EventEmitter } from 'events'
+import bencode from 'bencode'
+import BitField from 'bitfield'
+import Debug from 'debug'
+import sha1 from 'simple-sha1'
+
+const debug = Debug('ut_metadata')
 
 const MAX_METADATA_SIZE = 1E7 // 10 MB
 const BITFIELD_GROW = 1E3
 const PIECE_LENGTH = 1 << 14 // 16 KiB
 
-module.exports = metadata => {
+export default metadata => {
   class utMetadata extends EventEmitter {
     constructor (wire) {
       super()

package.json

@@ -10,6 +10,7 @@
   "bugs": {
     "url": "https://github.com/webtorrent/ut_metadata/issues"
   },
+  "type": "module",
   "dependencies": {
     "bencode": "^2.0.1",
     "bitfield": "^4.0.0",
@@ -37,7 +38,12 @@
     "ut_metadata"
   ],
   "license": "MIT",
-  "main": "index.js",
+  "engines": {
+    "node": ">=12.20.0"
+  },
+  "exports": {
+    "import": "./index.js"
+  },
   "repository": {
     "type": "git",
     "url": "git://github.com/webtorrent/ut_metadata.git"

test/basic.js

@@ -1,8 +1,10 @@
-const { leavesMetadata } = require('webtorrent-fixtures')
-const bencode = require('bencode')
-const Protocol = require('bittorrent-protocol')
-const test = require('tape')
-const utMetadata = require('../')
+import fixtures from 'webtorrent-fixtures'
+import bencode from 'bencode'
+import Protocol from 'bittorrent-protocol'
+import test from 'tape'
+import utMetadata from '../index.js'
+
+const { leavesMetadata } = fixtures
 
 test('wire.use(utMetadata())', t => {
   const wire = new Protocol()

test/fetch.js

@@ -1,8 +1,10 @@
-const { leavesMetadata, sintel } = require('webtorrent-fixtures')
-const bencode = require('bencode')
-const Protocol = require('bittorrent-protocol')
-const test = require('tape')
-const utMetadata = require('../')
+import fixtures from 'webtorrent-fixtures'
+import bencode from 'bencode'
+import Protocol from 'bittorrent-protocol'
+import test from 'tape'
+import utMetadata from '../index.js'
+
+const { leavesMetadata, sintel } = fixtures
 
 const id1 = Buffer.from('01234567890123456789')
 const id2 = Buffer.from('12345678901234567890')

test/package.json

@@ -1,6 +1,7 @@
 {
   "name": "test",
   "version": "0.0.0",
+  "type": "module",
   "browserify": {
     "transform": ["brfs"]
   }