use ESM instead of CJS

eslint.config.mjs

@@ -29,7 +29,7 @@ export default tseslint.config(
   },
   {
     // Once we remove the legacy vows tests in ./test, we can remove these JS-specific rules
-    files: ['test/**/*.js', 'eslint.config.mjs'],
+    files: ['test/**/*.cjs', 'eslint.config.mjs'],
     ...tseslint.configs.disableTypeChecked,
     rules: {
       ...tseslint.configs.disableTypeChecked.rules,

jest.config.ts

@@ -1,13 +1,16 @@
-import type { JestConfigWithTsJest } from "ts-jest";
+import type { JestConfigWithTsJest } from 'ts-jest'
 
 const config: JestConfigWithTsJest = {
   preset: 'ts-jest',
   testEnvironment: 'node',
   rootDir: './lib/',
   testPathIgnorePatterns: ['./lib/__tests__/data/'],
   fakeTimers: {
-    enableGlobally: true
-  }
+    enableGlobally: true,
+  },
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
 }
 
 export default config

lib/__tests__/canonicalDomain.spec.ts

@@ -1,4 +1,4 @@
-import { canonicalDomain } from '../cookie/canonicalDomain'
+import { canonicalDomain } from '../cookie/canonicalDomain.js'
 
 // port of tests/domain_and_path_test.js (canonicalDomain tests for domain normalization)
 describe('canonicalDomain', () => {

lib/__tests__/cookie.spec.ts

@@ -29,7 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-import { Cookie } from '../cookie/cookie'
+import { Cookie } from '../cookie/cookie.js'
 
 // ported from test/api_test.js (cookie tests)
 describe('Cookie', () => {

lib/__tests__/cookieJar.spec.ts

@@ -29,11 +29,11 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-import { Cookie } from '../cookie/cookie'
-import { CookieJar } from '../cookie/cookieJar'
-import type { SerializedCookieJar } from '../cookie/constants'
-import { MemoryCookieStore } from '../memstore'
-import { Store } from '../store'
+import { Cookie } from '../cookie/cookie.js'
+import { CookieJar } from '../cookie/cookieJar.js'
+import type { SerializedCookieJar } from '../cookie/constants.js'
+import { MemoryCookieStore } from '../memstore.js'
+import { Store } from '../store.js'
 
 // ported from:
 // - test/api_test.js (cookie jar tests)

lib/__tests__/cookiePrefixes.spec.ts

@@ -1,5 +1,5 @@
-import { PrefixSecurityEnum } from '../cookie/constants'
-import { CookieJar } from '../cookie/cookieJar'
+import { PrefixSecurityEnum } from '../cookie/constants.js'
+import { CookieJar } from '../cookie/cookieJar.js'
 
 let cookieJar: CookieJar
 const insecureUrl = 'http://www.example.com'

lib/__tests__/cookieSorting.spec.ts

@@ -1,6 +1,6 @@
-import { Cookie } from '../cookie/cookie'
-import { cookieCompare } from '../cookie/cookieCompare'
-import { CookieJar } from '../cookie/cookieJar'
+import { Cookie } from '../cookie/cookie.js'
+import { cookieCompare } from '../cookie/cookieCompare.js'
+import { CookieJar } from '../cookie/cookieJar.js'
 
 describe('Cookie sorting', () => {
   describe('assumptions', () => {

lib/__tests__/cookieToAndFromJson.spec.ts

@@ -1,4 +1,4 @@
-import { Cookie } from '../cookie/cookie'
+import { Cookie } from '../cookie/cookie.js'
 
 describe('Cookie.toJSON()', () => {
   it('should serialize a cookie to JSON', () => {

lib/__tests__/cookieToString.spec.ts

@@ -1,4 +1,4 @@
-import { Cookie } from '../cookie/cookie'
+import { Cookie } from '../cookie/cookie.js'
 
 describe('Cookie.toString()', () => {
   const parse = (cookieString: string): Cookie => {

lib/__tests__/cookieUtils.spec.ts

@@ -1,5 +1,5 @@
 import { inspect } from 'node:util'
-import { Cookie } from '../cookie/cookie'
+import { Cookie } from '../cookie/cookie.js'
 
 describe('Cookie utils', () => {
   describe('custom inspect', () => {

lib/__tests__/date.spec.ts

@@ -37,7 +37,7 @@ type EquivalenceDateParsingTestCase = {
   [key: string]: string
 }
 
-import { parseDate } from '../cookie/parseDate'
+import { parseDate } from '../cookie/parseDate.js'
 
 const dateTests: DateParsingTestCase = {
   'Wed, 09 Jun 2021 10:18:14 GMT': true,

lib/__tests__/defaultPath.spec.ts

@@ -1,4 +1,4 @@
-import { defaultPath } from '../cookie/defaultPath'
+import { defaultPath } from '../cookie/defaultPath.js'
 
 // port of tests/domain_and_path_test.js (default path tests)
 describe('defaultPath', () => {

lib/__tests__/domainMatch.spec.ts

@@ -1,4 +1,4 @@
-import { domainMatch } from '../cookie/domainMatch'
+import { domainMatch } from '../cookie/domainMatch.js'
 
 // port of tests/domain_and_path_test.js (domain match tests)
 describe('domainMatch', () => {

lib/__tests__/ietf.spec.ts

@@ -30,11 +30,11 @@
  */
 
 import url from 'url'
-import parserData from './data/parser'
-import bsdExampleDates from './data/dates/bsd-examples'
-import exampleDates from './data/dates/examples'
-import { CookieJar } from '../cookie/cookieJar'
-import { parseDate } from '../cookie/parseDate'
+import parserData from './data/parser.js'
+import bsdExampleDates from './data/dates/bsd-examples.js'
+import exampleDates from './data/dates/examples.js'
+import { CookieJar } from '../cookie/cookieJar.js'
+import { parseDate } from '../cookie/parseDate.js'
 
 describe('IETF http state tests', () => {
   describe('Set/get cookie tests', () => {

lib/__tests__/jarSerialization.spec.ts

@@ -28,12 +28,15 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
-import { Cookie } from '../cookie/cookie'
-import { CookieJar } from '../cookie/cookieJar'
-import type { SerializedCookie, SerializedCookieJar } from '../cookie/constants'
-import { MemoryCookieStore } from '../memstore'
-import { Store } from '../store'
-import { version } from '../version'
+import { Cookie } from '../cookie/cookie.js'
+import { CookieJar } from '../cookie/cookieJar.js'
+import type {
+  SerializedCookie,
+  SerializedCookieJar,
+} from '../cookie/constants.js'
+import { MemoryCookieStore } from '../memstore.js'
+import { Store } from '../store.js'
+import { version } from '../version.js'
 
 describe('cookieJar serialization', () => {
   it('should use the expected version', () => {

lib/__tests__/lifetime.spec.ts

@@ -1,4 +1,4 @@
-import { Cookie } from '../cookie/cookie'
+import { Cookie } from '../cookie/cookie.js'
 
 describe('Lifetime', () => {
   it('should be able to set a TTL using max-age', () => {

lib/__tests__/memoryCookieStore.spec.ts

@@ -1,5 +1,5 @@
-import { Cookie } from '../cookie/cookie'
-import { MemoryCookieStore } from '../memstore'
+import { Cookie } from '../cookie/cookie.js'
+import { MemoryCookieStore } from '../memstore.js'
 
 describe('MemoryCookieStore', () => {
   it('should have no static methods', () => {

lib/__tests__/parse.spec.ts

@@ -1,4 +1,4 @@
-import { Cookie } from '../cookie/cookie'
+import { Cookie } from '../cookie/cookie.js'
 import { performance } from 'node:perf_hooks'
 
 describe('Cookie.parse', () => {

lib/__tests__/pathMatch.spec.ts

@@ -1,4 +1,4 @@
-import { pathMatch } from '../pathMatch'
+import { pathMatch } from '../pathMatch.js'
 
 // port of tests/domain_and_path_test.js (path match tests)
 describe('pathMatch', () => {

lib/__tests__/permuteDomain.spec.ts

@@ -1,4 +1,4 @@
-import { permuteDomain } from '../permuteDomain'
+import { permuteDomain } from '../permuteDomain.js'
 
 // port of tests/domain_and_path_test.js (permute domain tests)
 describe('permuteDomain', () => {

lib/__tests__/permutePath.spec.ts

@@ -1,5 +1,5 @@
-import { permutePath } from '../cookie/permutePath'
-import { pathMatch } from '../pathMatch'
+import { permutePath } from '../cookie/permutePath.js'
+import { pathMatch } from '../pathMatch.js'
 
 // port of tests/domain_and_path_test.js (permute path tests)
 describe('permutePath', () => {

lib/__tests__/regression.spec.ts

@@ -1,5 +1,5 @@
-import type { Cookie } from '../cookie/cookie'
-import { CookieJar } from '../cookie/cookieJar'
+import type { Cookie } from '../cookie/cookie.js'
+import { CookieJar } from '../cookie/cookieJar.js'
 
 const url = 'http://www.example.com'
 

lib/__tests__/removeAll.spec.ts

@@ -1,8 +1,8 @@
-import type { Cookie } from '../cookie/cookie'
-import { CookieJar } from '../cookie/cookieJar'
-import { MemoryCookieStore } from '../memstore'
-import { Store } from '../store'
-import type { Callback, ErrorCallback } from '../utils'
+import type { Cookie } from '../cookie/cookie.js'
+import { CookieJar } from '../cookie/cookieJar.js'
+import { MemoryCookieStore } from '../memstore.js'
+import { Store } from '../store.js'
+import type { Callback, ErrorCallback } from '../utils.js'
 
 const url = 'http://example.com/index.html'
 

lib/__tests__/sameSite.spec.ts

@@ -1,5 +1,5 @@
-import { Cookie } from '../cookie/cookie'
-import { CookieJar } from '../cookie/cookieJar'
+import { Cookie } from '../cookie/cookie.js'
+import { CookieJar } from '../cookie/cookieJar.js'
 
 const url = 'http://example.com/index.html'
 

lib/__tests__/util.spec.ts

@@ -1,4 +1,4 @@
-import { safeToString } from '../utils'
+import { safeToString } from '../utils.js'
 
 describe('safeToString', () => {
   const recursiveArray: unknown[] = [1]

lib/cookie/canonicalDomain.ts

@@ -1,5 +1,5 @@
-import { IP_V6_REGEX_OBJECT } from './constants'
-import type { Nullable } from '../utils'
+import { IP_V6_REGEX_OBJECT } from './constants.js'
+import type { Nullable } from '../utils.js'
 import { domainToASCII } from 'node:url'
 
 /**

lib/cookie/cookie.ts

@@ -28,14 +28,14 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
-import { getPublicSuffix } from '../getPublicSuffix'
-import * as validators from '../validators'
-import { inOperator } from '../utils'
-
-import { formatDate } from './formatDate'
-import { parseDate } from './parseDate'
-import { canonicalDomain } from './canonicalDomain'
-import type { SerializedCookie } from './constants'
+import { getPublicSuffix } from '../getPublicSuffix.js'
+import * as validators from '../validators.js'
+import { inOperator } from '../utils.js'
+
+import { formatDate } from './formatDate.js'
+import { parseDate } from './parseDate.js'
+import { canonicalDomain } from './canonicalDomain.js'
+import type { SerializedCookie } from './constants.js'
 
 // From RFC6265 S4.1.1
 // note that it excludes \x3B ";"

lib/cookie/cookieCompare.ts

@@ -1,4 +1,4 @@
-import type { Cookie } from './cookie'
+import type { Cookie } from './cookie.js'
 
 /**
  * The maximum timestamp a cookie, in milliseconds. The value is (2^31 - 1) seconds since the Unix

lib/cookie/cookieJar.ts

@@ -1,28 +1,28 @@
-import { getPublicSuffix } from '../getPublicSuffix'
-import * as validators from '../validators'
-import { ParameterError } from '../validators'
-import { Store } from '../store'
-import { MemoryCookieStore } from '../memstore'
-import { pathMatch } from '../pathMatch'
-import { Cookie } from './cookie'
+import { getPublicSuffix } from '../getPublicSuffix.js'
+import * as validators from '../validators.js'
+import { ParameterError } from '../validators.js'
+import { Store } from '../store.js'
+import { MemoryCookieStore } from '../memstore.js'
+import { pathMatch } from '../pathMatch.js'
+import { Cookie } from './cookie.js'
 import {
   Callback,
   createPromiseCallback,
   ErrorCallback,
   inOperator,
   Nullable,
   safeToString,
-} from '../utils'
-import { canonicalDomain } from './canonicalDomain'
+} from '../utils.js'
+import { canonicalDomain } from './canonicalDomain.js'
 import {
   IP_V6_REGEX_OBJECT,
   PrefixSecurityEnum,
   SerializedCookieJar,
-} from './constants'
-import { defaultPath } from './defaultPath'
-import { domainMatch } from './domainMatch'
-import { cookieCompare } from './cookieCompare'
-import { version } from '../version'
+} from './constants.js'
+import { defaultPath } from './defaultPath.js'
+import { domainMatch } from './domainMatch.js'
+import { cookieCompare } from './cookieCompare.js'
+import { version } from '../version.js'
 
 const defaultSetCookieOptions: SetCookieOptions = {
   loose: false,

lib/cookie/defaultPath.ts

@@ -1,4 +1,4 @@
-import type { Nullable } from '../utils'
+import type { Nullable } from '../utils.js'
 
 /**
  * Given a current request/response path, gives the path appropriate for storing

lib/cookie/domainMatch.ts

@@ -1,5 +1,5 @@
-import type { Nullable } from '../utils'
-import { canonicalDomain } from './canonicalDomain'
+import type { Nullable } from '../utils.js'
+import { canonicalDomain } from './canonicalDomain.js'
 
 // Dumped from ip-regex@4.0.0, with the following changes:
 // * all capturing groups converted to non-capturing -- "(?:)"

lib/cookie/index.ts

@@ -1,32 +1,32 @@
-export { MemoryCookieStore, MemoryCookieStoreIndex } from '../memstore'
-export { pathMatch } from '../pathMatch'
-export { permuteDomain } from '../permuteDomain'
-export { getPublicSuffix, GetPublicSuffixOptions } from '../getPublicSuffix'
-export { Store } from '../store'
-export { ParameterError } from '../validators'
-export { version } from '../version'
-export { Callback, ErrorCallback, Nullable } from '../utils'
-export { canonicalDomain } from './canonicalDomain'
+export { MemoryCookieStore, MemoryCookieStoreIndex } from '../memstore.js'
+export { pathMatch } from '../pathMatch.js'
+export { permuteDomain } from '../permuteDomain.js'
+export { getPublicSuffix, GetPublicSuffixOptions } from '../getPublicSuffix.js'
+export { Store } from '../store.js'
+export { ParameterError } from '../validators.js'
+export { version } from '../version.js'
+export { Callback, ErrorCallback, Nullable } from '../utils.js'
+export { canonicalDomain } from './canonicalDomain.js'
 export {
   PrefixSecurityEnum,
   SerializedCookie,
   SerializedCookieJar,
-} from './constants'
-export { Cookie, CreateCookieOptions, ParseCookieOptions } from './cookie'
-export { cookieCompare } from './cookieCompare'
+} from './constants.js'
+export { Cookie, CreateCookieOptions, ParseCookieOptions } from './cookie.js'
+export { cookieCompare } from './cookieCompare.js'
 export {
   CookieJar,
   CreateCookieJarOptions,
   GetCookiesOptions,
   SetCookieOptions,
-} from './cookieJar'
-export { defaultPath } from './defaultPath'
-export { domainMatch } from './domainMatch'
-export { formatDate } from './formatDate'
-export { parseDate } from './parseDate'
-export { permutePath } from './permutePath'
+} from './cookieJar.js'
+export { defaultPath } from './defaultPath.js'
+export { domainMatch } from './domainMatch.js'
+export { formatDate } from './formatDate.js'
+export { parseDate } from './parseDate.js'
+export { permutePath } from './permutePath.js'
 
-import { Cookie, ParseCookieOptions } from './cookie'
+import { Cookie, ParseCookieOptions } from './cookie.js'
 
 /**
  * {@inheritDoc Cookie.parse}

lib/cookie/parseDate.ts

@@ -1,6 +1,6 @@
 // date-time parsing constants (RFC6265 S5.1.1)
 
-import type { Nullable } from '../utils'
+import type { Nullable } from '../utils.js'
 
 // eslint-disable-next-line no-control-regex
 const DATE_DELIM = /[\x09\x20-\x2F\x3B-\x40\x5B-\x60\x7B-\x7E]/