From b9bdfc3afa6bd22f98665715c49431da9d7bccbc Mon Sep 17 00:00:00 2001
From: uzlopak <aras.abbasi@googlemail.com>
Date: Mon, 29 Jan 2024 14:23:34 +0100
Subject: [PATCH] lib: enable WebSocket by default

---
 doc/api/cli.md                           | 20 +++++++++-----------
 doc/api/globals.md                       | 10 +++++++---
 lib/internal/process/pre_execution.js    |  2 +-
 src/node_options.h                       |  2 +-
 test/parallel/test-websocket-disabled.js |  7 +++++++
 test/parallel/test-websocket.js          |  1 -
 6 files changed, 25 insertions(+), 17 deletions(-)
 create mode 100644 test/parallel/test-websocket-disabled.js

diff --git a/doc/api/cli.md b/doc/api/cli.md
index 840585765e7fa6..91e03bb3515743 100644
--- a/doc/api/cli.md
+++ b/doc/api/cli.md
@@ -931,16 +931,6 @@ added: v12.3.0
 
 Enable experimental WebAssembly module support.
 
-### `--experimental-websocket`
-
-<!-- YAML
-added:
-  - v21.0.0
-  - v20.10.0
--->
-
-Enable experimental [`WebSocket`][] support.
-
 ### `--force-context-aware`
 
 <!-- YAML
@@ -1359,6 +1349,14 @@ added: v16.6.0
 
 Use this flag to disable top-level await in REPL.
 
+### `--no-experimental-websocket`
+
+<!-- YAML
+added: REPLACEME
+-->
+
+Use this flag to disable experimental [`WebSocket`][] support.
+
 ### `--no-extra-info-on-fatal-exception`
 
 <!-- YAML
@@ -2493,7 +2491,6 @@ Node.js options that are allowed are:
 * `--experimental-vm-modules`
 * `--experimental-wasi-unstable-preview1`
 * `--experimental-wasm-modules`
-* `--experimental-websocket`
 * `--force-context-aware`
 * `--force-fips`
 * `--force-node-api-uncaught-exceptions-policy`
@@ -2518,6 +2515,7 @@ Node.js options that are allowed are:
 * `--no-experimental-global-navigator`
 * `--no-experimental-global-webcrypto`
 * `--no-experimental-repl-await`
+* `--no-experimental-websocket`
 * `--no-extra-info-on-fatal-exception`
 * `--no-force-async-hooks-checks`
 * `--no-global-search-paths`
diff --git a/doc/api/globals.md b/doc/api/globals.md
index e8a46b67d6007d..ef04062ddfc2a5 100644
--- a/doc/api/globals.md
+++ b/doc/api/globals.md
@@ -1097,12 +1097,16 @@ The object that acts as the namespace for all W3C
 added:
   - v21.0.0
   - v20.10.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/51594
+    description: No longer behind `--experimental-websocket` CLI flag.
 -->
 
 > Stability: 1 - Experimental.
 
-A browser-compatible implementation of [`WebSocket`][]. Enable this API
-with the [`--experimental-websocket`][] CLI flag.
+A browser-compatible implementation of [`WebSocket`][]. Disable this API
+with the [`--no-experimental-websocket`][] CLI flag.
 
 ## Class: `WritableStream`
 
@@ -1139,10 +1143,10 @@ A browser-compatible implementation of [`WritableStreamDefaultWriter`][].
 [Navigator API]: https://html.spec.whatwg.org/multipage/system-state.html#the-navigator-object
 [RFC 5646]: https://www.rfc-editor.org/rfc/rfc5646.txt
 [Web Crypto API]: webcrypto.md
-[`--experimental-websocket`]: cli.md#--experimental-websocket
 [`--no-experimental-global-customevent`]: cli.md#--no-experimental-global-customevent
 [`--no-experimental-global-navigator`]: cli.md#--no-experimental-global-navigator
 [`--no-experimental-global-webcrypto`]: cli.md#--no-experimental-global-webcrypto
+[`--no-experimental-websocket`]: cli.md#--no-experimental-websocket
 [`AbortController`]: https://developer.mozilla.org/en-US/docs/Web/API/AbortController
 [`ByteLengthQueuingStrategy`]: webstreams.md#class-bytelengthqueuingstrategy
 [`CompressionStream`]: webstreams.md#class-compressionstream
diff --git a/lib/internal/process/pre_execution.js b/lib/internal/process/pre_execution.js
index 98533b7828d3ff..49114847d4d1a5 100644
--- a/lib/internal/process/pre_execution.js
+++ b/lib/internal/process/pre_execution.js
@@ -349,7 +349,7 @@ function setupUndici() {
     });
   }
 
-  if (getOptionValue('--experimental-websocket')) {
+  if (!getOptionValue('--no-experimental-websocket')) {
     ObjectDefineProperties(globalThis, {
       WebSocket: lazyInterface('WebSocket'),
     });
diff --git a/src/node_options.h b/src/node_options.h
index 915151b7dc2904..a0b56ebacb436c 100644
--- a/src/node_options.h
+++ b/src/node_options.h
@@ -108,7 +108,7 @@ class EnvironmentOptions : public Options {
   std::string dns_result_order;
   bool enable_source_maps = false;
   bool experimental_fetch = true;
-  bool experimental_websocket = false;
+  bool experimental_websocket = true;
   bool experimental_global_customevent = true;
   bool experimental_global_navigator = true;
   bool experimental_global_web_crypto = true;
diff --git a/test/parallel/test-websocket-disabled.js b/test/parallel/test-websocket-disabled.js
new file mode 100644
index 00000000000000..4d72294367718b
--- /dev/null
+++ b/test/parallel/test-websocket-disabled.js
@@ -0,0 +1,7 @@
+// Flags: --no-experimental-websocket
+'use strict';
+
+require('../common');
+const assert = require('assert');
+
+assert.strictEqual(typeof WebSocket, 'undefined');
diff --git a/test/parallel/test-websocket.js b/test/parallel/test-websocket.js
index 2a7069ccf3b739..c595ec12bfb66c 100644
--- a/test/parallel/test-websocket.js
+++ b/test/parallel/test-websocket.js
@@ -1,4 +1,3 @@
-// Flags: --experimental-websocket
 'use strict';
 
 require('../common');