From b4850f2ee41f3429214eb2733d70656113e4ad22 Mon Sep 17 00:00:00 2001
From: Muthukumar <75667393+BenzeneAlcohol@users.noreply.github.com>
Date: Fri, 10 Nov 2023 17:56:12 +0530
Subject: [PATCH] lib: make event static properties non writable and
 configurable
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The idl definition for Event makes the properties constant
this means that they shouldn't be configurable and writable.
However, they were, and this commit fixes that.

Fixes: https://github.com/nodejs/node/issues/50417
PR-URL: https://github.com/nodejs/node/pull/50425
Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br>
Reviewed-By: Matthew Aitken <maitken033380023@gmail.com>
---
 lib/internal/event_target.js       | 22 +++++++++++++++++-----
 test/parallel/test-event-target.js | 21 +++++++++++++++++++++
 2 files changed, 38 insertions(+), 5 deletions(-)
 create mode 100644 test/parallel/test-event-target.js

diff --git a/lib/internal/event_target.js b/lib/internal/event_target.js
index 0236f3a53c5276..4c67453fea4c59 100644
--- a/lib/internal/event_target.js
+++ b/lib/internal/event_target.js
@@ -2,6 +2,7 @@
 
 const {
   ArrayFrom,
+  ArrayPrototypeReduce,
   Boolean,
   Error,
   FunctionPrototypeCall,
@@ -314,11 +315,6 @@ class Event {
       throw new ERR_INVALID_THIS('Event');
     this.#propagationStopped = true;
   }
-
-  static NONE = 0;
-  static CAPTURING_PHASE = 1;
-  static AT_TARGET = 2;
-  static BUBBLING_PHASE = 3;
 }
 
 ObjectDefineProperties(
@@ -354,6 +350,22 @@ ObjectDefineProperties(
     isTrusted: isTrustedDescriptor,
   });
 
+const staticProps = ['NONE', 'CAPTURING_PHASE', 'AT_TARGET', 'BUBBLING_PHASE'];
+
+ObjectDefineProperties(
+  Event,
+  ArrayPrototypeReduce(staticProps, (result, staticProp, index = 0) => {
+    result[staticProp] = {
+      __proto__: null,
+      writable: false,
+      configurable: false,
+      enumerable: true,
+      value: index,
+    };
+    return result;
+  }, {}),
+);
+
 function isCustomEvent(value) {
   return isEvent(value) && (value?.[kDetail] !== undefined);
 }
diff --git a/test/parallel/test-event-target.js b/test/parallel/test-event-target.js
new file mode 100644
index 00000000000000..12246b15ae859c
--- /dev/null
+++ b/test/parallel/test-event-target.js
@@ -0,0 +1,21 @@
+'use strict';
+
+require('../common');
+const assert = require('assert');
+
+const eventPhases = {
+  'NONE': 0,
+  'CAPTURING_PHASE': 1,
+  'AT_TARGET': 2,
+  'BUBBLING_PHASE': 3
+};
+
+for (const [prop, value] of Object.entries(eventPhases)) {
+  // Check if the value of the property matches the expected value
+  assert.strictEqual(Event[prop], value, `Expected Event.${prop} to be ${value}, but got ${Event[prop]}`);
+
+  const desc = Object.getOwnPropertyDescriptor(Event, prop);
+  assert.strictEqual(desc.writable, false, `${prop} should not be writable`);
+  assert.strictEqual(desc.configurable, false, `${prop} should not be configurable`);
+  assert.strictEqual(desc.enumerable, true, `${prop} should be enumerable`);
+}