2023-10-17, Version 21.0.0 (Current)

Notable Changes:

doc:
  * promote fetch/webstreams from experimental to stable (Steven) #45684
esm:
  * use import attributes instead of import assertions (Antoine du Hamel) #50140
  * --experimental-default-type flag to flip module defaults (Geoffrey Booth) #49869
  * remove `globalPreload` hook (superseded by `initialize`) (Jacob Smith) #49144
fs:
  * add flush option to writeFile() functions (Colin Ihrig) #50009
  * (SEMVER-MAJOR) add globSync implementation (Moshe Atlow) #47653
http:
  * (SEMVER-MAJOR) reduce parts in chunked response when corking (Robert Nagy) #50167
lib:
  * (SEMVER-MINOR) add WebSocket client (Matthew Aitken) #49830
  * (SEMVER-MAJOR) add `navigator.hardwareConcurrency` (Yagiz Nizipli) #47769
stream:
  * optimize Writable (Robert Nagy) #50012
test_runner:
  * (SEMVER-MAJOR) support passing globs (Moshe Atlow) #47653
vm:
  * use default HDO when importModuleDynamically is not set (Joyee Cheung) #49950

Semver-Major Commits:

* (SEMVER-MAJOR) build: drop support for Visual Studio 2019 (Michaël Zasso) #49051
* (SEMVER-MAJOR) build: bump supported macOS and Xcode versions (Michaël Zasso) #49164
* (SEMVER-MAJOR) crypto: do not overwrite \_writableState.defaultEncoding (Tobias Nießen) #49140
* (SEMVER-MAJOR) deps: bump minimum ICU version to 73 (Michaël Zasso) #49639
* (SEMVER-MAJOR) deps: update V8 to 11.8.172.13 (Michaël Zasso) #49639
* (SEMVER-MAJOR) deps: update llhttp to 9.1.2 (Paolo Insogna) #48981
* (SEMVER-MAJOR) events: validate options of `on` and `once` (Deokjin Kim) #46018
* (SEMVER-MAJOR) fs: adjust `position` validation in reading methods (Livia Medeiros) #42835
* (SEMVER-MAJOR) fs: add globSync implementation (Moshe Atlow) #47653
* (SEMVER-MAJOR) http: reduce parts in chunked response when corking (Robert Nagy) #50167
* (SEMVER-MAJOR) lib: mark URL/URLSearchParams as uncloneable and untransferable (Chengzhong Wu) #47497
* (SEMVER-MAJOR) lib: remove aix directory case for package reader (Yagiz Nizipli) #48605
* (SEMVER-MAJOR) lib: add `navigator.hardwareConcurrency` (Yagiz Nizipli) #47769
* (SEMVER-MAJOR) lib: runtime deprecate punycode (Yagiz Nizipli) #47202
* (SEMVER-MAJOR) module: harmonize error code between ESM and CJS (Antoine du Hamel) #48606
* (SEMVER-MAJOR) net: do not treat `server.maxConnections=0` as `Infinity` (ignoramous) #48276
* (SEMVER-MAJOR) net: only defer \_final call when connecting (Jason Zhang) #47385
* (SEMVER-MAJOR) node-api: rename internal NAPI\_VERSION definition (Chengzhong Wu) #48501
* (SEMVER-MAJOR) src: update NODE\_MODULE\_VERSION to 120 (Michaël Zasso) #49639
* (SEMVER-MAJOR) src: throw DOMException on cloning non-serializable objects (Chengzhong Wu) #47839
* (SEMVER-MAJOR) src: throw DataCloneError on transfering untransferable objects (Chengzhong Wu) #47604
* (SEMVER-MAJOR) stream: use private properties for strategies (Yagiz Nizipli) #47218
* (SEMVER-MAJOR) stream: use private properties for encoding (Yagiz Nizipli) #47218
* (SEMVER-MAJOR) stream: use private properties for compression (Yagiz Nizipli) #47218
* (SEMVER-MAJOR) test\_runner: disallow array in `run` options (Raz Luvaton) #49935
* (SEMVER-MAJOR) test\_runner: support passing globs (Moshe Atlow) #47653
* (SEMVER-MAJOR) tls: use `validateNumber` for `options.minDHSize` (Deokjin Kim) #49973
* (SEMVER-MAJOR) tls: use validateFunction for `options.checkServerIdentity` (Deokjin Kim) #49896
* (SEMVER-MAJOR) util: runtime deprecate `promisify`-ing a function returning a `Promise` (Antoine du Hamel) #49609
* (SEMVER-MAJOR) vm: freeze `dependencySpecifiers` array (Antoine du Hamel) #49720

PR-URL: #49870
Co-authored-by: Michaël Zasso <targos@protonmail.com>

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 Select a Node.js version below to view the changelog history:
 
+* [Node.js 21](doc/changelogs/CHANGELOG_V21.md) **Current**
 * [Node.js 20](doc/changelogs/CHANGELOG_V20.md) **Current**
 * [Node.js 19](doc/changelogs/CHANGELOG_V19.md) End-of-Life
 * [Node.js 18](doc/changelogs/CHANGELOG_V18.md) **Long Term Support**
@@ -29,11 +30,15 @@ release.
 
 <table>
 <tr>
+  <th title="Current"><a href="doc/changelogs/CHANGELOG_V21.md">21</a> (Current)</th>
   <th title="Current"><a href="doc/changelogs/CHANGELOG_V20.md">20</a> (Current)</th>
   <th title="LTS Until 2025-04"><a href="doc/changelogs/CHANGELOG_V18.md">18</a> (LTS)</th>
 </tr>
 <tr>
   <td valign="top">
+<b><a href="doc/changelogs/CHANGELOG_V21.md#21.0.0">21.0.0</a></b><br/>
+  </td>
+  <td valign="top">
 <b><a href="doc/changelogs/CHANGELOG_V20.md#20.8.1">20.8.1</a></b><br/>
 <a href="doc/changelogs/CHANGELOG_V20.md#20.8.0">20.8.0</a><br/>
 <a href="doc/changelogs/CHANGELOG_V20.md#20.7.0">20.7.0</a><br/>

doc/abi_version_registry.json

@@ -1,6 +1,6 @@
 {
   "NODE_MODULE_VERSION": [
-    { "modules": 120,"runtime": "node",     "variant": "v8_11.8",              "versions": "21.0.0-pre" },
+    { "modules": 120,"runtime": "node",     "variant": "v8_11.8",              "versions": "21.0.0" },
     { "modules": 119,"runtime": "electron", "variant": "electron",             "versions": "28" },
     { "modules": 118,"runtime": "electron", "variant": "electron",             "versions": "27" },
     { "modules": 117,"runtime": "electron", "variant": "electron",             "versions": "26" },

doc/api/cli.md

@@ -594,7 +594,7 @@ and `"` are usable.
 
 <!-- YAML
 added:
-  - REPLACEME
+  - v21.0.0
 -->
 
 > Stability: 1.0 - Early development
@@ -774,7 +774,7 @@ Enable experimental WebAssembly module support.
 ### `--experimental-websocket`
 
 <!-- YAML
-added: REPLACEME
+added: v21.0.0
 -->
 
 Enable experimental [`WebSocket`][] support.
@@ -1657,7 +1657,7 @@ for more details.
 ### `--test-concurrency`
 
 <!-- YAML
-added: REPLACEME
+added: v21.0.0
 -->
 
 The maximum number of test files that the test runner CLI will execute

doc/api/deprecations.md

@@ -872,7 +872,7 @@ The [`require.extensions`][] property is deprecated.
 
 <!-- YAML
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/47202
     description: Runtime deprecation.
   - version: v16.6.0
@@ -3387,7 +3387,7 @@ Consider using alternatives such as the [`mock`][] helper function.
 
 <!-- YAML
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/49609
     description: Runtime deprecation.
   - version: v20.8.0

doc/api/errors.md

@@ -1791,7 +1791,7 @@ An import attribute is not supported by this version of Node.js.
 ### `ERR_IMPORT_ATTRIBUTE_UNSUPPORTED`
 
 <!-- YAML
-added: REPLACEME
+added: v21.0.0
 -->
 
 An import attribute is not supported by this version of Node.js.
@@ -3293,9 +3293,9 @@ An invalid or unknown file encoding was passed.
 ### `ERR_INVALID_TRANSFER_OBJECT`
 
 <!-- YAML
-removed: REPLACEME
+removed: v21.0.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/47839
     description: A `DOMException` is thrown instead.
 -->
@@ -3320,9 +3320,9 @@ transferable objects also exist now.
 
 <!-- YAML
 added: v15.0.0
-removed: REPLACEME
+removed: v21.0.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/47839
     description: A `DOMException` is thrown instead.
 -->

doc/api/esm.md

@@ -7,7 +7,7 @@
 <!-- YAML
 added: v8.5.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/50140
     description: Add experimental support for import attributes.
   - version: v20.0.0
@@ -247,7 +247,7 @@ added:
   - v17.1.0
   - v16.14.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/50140
     description: Switch from Import Assertions to Import Attributes.
 -->

doc/api/fs.md

@@ -319,7 +319,7 @@ fd.createReadStream({ start: 90, end: 99 });
 <!-- YAML
 added: v16.11.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/50093
     description: The `flush` option is now supported.
 -->
@@ -376,7 +376,7 @@ added: v10.0.0
 <!-- YAML
 added: v10.0.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/42835
     description: Accepts bigint values as `position`.
 -->
@@ -406,7 +406,7 @@ added:
  - v13.11.0
  - v12.17.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/42835
     description: Accepts bigint values as `position`.
 -->
@@ -440,7 +440,7 @@ added:
   - v18.2.0
   - v16.17.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/42835
     description: Accepts bigint values as `position`.
 -->
@@ -1750,7 +1750,7 @@ All the [caveats][] for `fs.watch()` also apply to `fsPromises.watch()`.
 <!-- YAML
 added: v10.0.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/50009
     description: The `flush` option is now supported.
   - version:
@@ -2546,7 +2546,7 @@ If `options` is a string, then it specifies the encoding.
 <!-- YAML
 added: v0.1.31
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/50093
     description: The `flush` option is now supported.
   - version: v16.10.0
@@ -4900,7 +4900,7 @@ details.
 <!-- YAML
 added: v0.1.29
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/50009
     description: The `flush` option is now supported.
   - version: v19.0.0
@@ -6196,7 +6196,7 @@ this API: [`fs.utimes()`][].
 <!-- YAML
 added: v0.1.29
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/50009
     description: The `flush` option is now supported.
   - version: v19.0.0

doc/api/globals.md

@@ -479,7 +479,7 @@ added:
   - v16.15.0
 changes:
   - version:
-    - REPLACEME
+    - v21.0.0
     pr-url: https://github.com/nodejs/node/pull/45684
     description: No longer experimental.
   - version: v18.0.0
@@ -509,7 +509,7 @@ added:
   - v16.15.0
 changes:
   - version:
-    - REPLACEME
+    - v21.0.0
     pr-url: https://github.com/nodejs/node/pull/45684
     description: No longer experimental.
   - version: v18.0.0
@@ -548,7 +548,7 @@ added:
   - v16.15.0
 changes:
   - version:
-    - REPLACEME
+    - v21.0.0
     pr-url: https://github.com/nodejs/node/pull/45684
     description: No longer experimental.
   - version: v18.0.0
@@ -597,7 +597,7 @@ This variable may appear to be global but is not. See [`module`][].
 ## `Navigator`
 
 <!-- YAML
-added: REPLACEME
+added: v21.0.0
 -->
 
 > Stability: 1 - Experimental
@@ -607,7 +607,7 @@ A partial implementation of the [Navigator API][].
 ## `navigator`
 
 <!-- YAML
-added: REPLACEME
+added: v21.0.0
 -->
 
 > Stability: 1 - Experimental
@@ -617,7 +617,7 @@ A partial implementation of [`window.navigator`][].
 ### `navigator.hardwareConcurrency`
 
 <!-- YAML
-added: REPLACEME
+added: v21.0.0
 -->
 
 * {number}
@@ -823,7 +823,7 @@ added:
   - v16.15.0
 changes:
   - version:
-    - REPLACEME
+    - v21.0.0
     pr-url: https://github.com/nodejs/node/pull/45684
     description: No longer experimental.
   - version: v18.0.0
@@ -843,7 +843,7 @@ added:
   - v16.15.0
 changes:
   - version:
-    - REPLACEME
+    - v21.0.0
     pr-url: https://github.com/nodejs/node/pull/45684
     description: No longer experimental.
   - version: v18.0.0
@@ -1021,7 +1021,7 @@ The object that acts as the namespace for all W3C
 ## `WebSocket`
 
 <!-- YAML
-added: REPLACEME
+added: v21.0.0
 -->
 
 > Stability: 1 - Experimental.

doc/api/module.md

@@ -458,7 +458,7 @@ register('./path-to-my-hooks.js', {
 
 <!-- YAML
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/50140
     description: The property `context.importAssertions` is replaced with
                  `context.importAttributes`. Using the old name is still

doc/api/n-api.md

@@ -5431,7 +5431,7 @@ required in order to enable correct disposal of the reference.
 #### `node_api_post_finalizer`
 
 <!-- YAML
-added: REPLACEME
+added: v21.0.0
 -->
 
 > Stability: 1 - Experimental

doc/api/net.md

@@ -579,7 +579,7 @@ added: v5.7.0
 <!-- YAML
 added: v0.2.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/48276
     description: Setting `maxConnections` to `0` drops all the incoming
                  connections. Previously, it was interpreted as `Infinity`.

doc/api/webstreams.md

@@ -6,7 +6,7 @@
 added: v16.5.0
 changes:
   - version:
-    - REPLACEME
+    - v21.0.0
     pr-url: https://github.com/nodejs/node/pull/45684
     description: No longer experimental.
   - version: v18.0.0

doc/api/worker_threads.md

@@ -174,7 +174,7 @@ There is no equivalent to this API in browsers.
 ## `worker.isMarkedAsUntransferable(object)`
 
 <!-- YAML
-added: REPLACEME
+added: v21.0.0
 -->
 
 * `object` {any} Any JavaScript value.
@@ -600,7 +600,7 @@ are part of the channel.
 <!-- YAML
 added: v10.5.0
 changes:
-  - version: REPLACEME
+  - version: v21.0.0
     pr-url: https://github.com/nodejs/node/pull/47604
     description: An error is thrown when an untransferable object is in the
                  transfer list.

doc/changelogs/CHANGELOG_ARCHIVE.md

@@ -154,6 +154,7 @@
 </table>
 
 * Other Versions
+  * [21.x](CHANGELOG_V21.md)
   * [20.x](CHANGELOG_V20.md)
   * [19.x](CHANGELOG_V19.md)
   * [18.x](CHANGELOG_V18.md)

doc/changelogs/CHANGELOG_IOJS.md

@@ -62,6 +62,7 @@
 </table>
 
 * Other Versions
+  * [21.x](CHANGELOG_V21.md)
   * [20.x](CHANGELOG_V20.md)
   * [19.x](CHANGELOG_V19.md)
   * [18.x](CHANGELOG_V18.md)

doc/changelogs/CHANGELOG_V010.md

@@ -64,6 +64,7 @@
 </table>
 
 * Other Versions
+  * [21.x](CHANGELOG_V21.md)
   * [20.x](CHANGELOG_V20.md)
   * [18.x](CHANGELOG_V18.md)
   * [17.x](CHANGELOG_V17.md)

doc/changelogs/CHANGELOG_V012.md

@@ -32,6 +32,7 @@
 </table>
 
 * Other Versions
+  * [21.x](CHANGELOG_V21.md)
   * [20.x](CHANGELOG_V20.md)
   * [18.x](CHANGELOG_V18.md)
   * [17.x](CHANGELOG_V17.md)

doc/changelogs/CHANGELOG_V10.md

@@ -58,6 +58,7 @@
 </table>
 
 * Other Versions
+  * [21.x](CHANGELOG_V21.md)
   * [20.x](CHANGELOG_V20.md)
   * [19.x](CHANGELOG_V19.md)
   * [18.x](CHANGELOG_V18.md)

doc/changelogs/CHANGELOG_V11.md

@@ -30,6 +30,7 @@
 </table>
 
 * Other Versions
+  * [21.x](CHANGELOG_V21.md)
   * [19.x](CHANGELOG_V19.md)
   * [18.x](CHANGELOG_V18.md)
   * [17.x](CHANGELOG_V17.md)

doc/changelogs/CHANGELOG_V12.md

@@ -67,6 +67,7 @@
 </table>
 
 * Other Versions
+  * [21.x](CHANGELOG_V21.md)
   * [20.x](CHANGELOG_V20.md)
   * [19.x](CHANGELOG_V19.md)
   * [18.x](CHANGELOG_V18.md)

doc/changelogs/CHANGELOG_V13.md

@@ -30,6 +30,7 @@
 </table>
 
 * Other Versions
+  * [21.x](CHANGELOG_V21.md)
   * [20.x](CHANGELOG_V20.md)
   * [19.x](CHANGELOG_V19.md)
   * [18.x](CHANGELOG_V18.md)