From cb117eeff71bb34ac2c892fb30630dd3b84a42cf Mon Sep 17 00:00:00 2001
From: darwin808 <darwin.apolinario12@gmail.com>
Date: Tue, 30 Dec 2025 16:32:27 +0800
Subject: [PATCH] fix: add configurable:true to Event phase constant property
 descriptors

Fixes #54732

The Event class defines phase constants (NONE, CAPTURING_PHASE, AT_TARGET,
BUBBLING_PHASE) using Object.defineProperty without configurable:true. This
causes the event-target-shim library to fail when it tries to redefine these
properties, breaking abort-controller and consequently fetch() in New
Architecture apps.

This adds configurable:true to all 8 property definitions (4 on Event class,
4 on Event.prototype) to match the standard behavior expected by DOM polyfills.
---
 .../react-native/src/private/webapis/dom/events/Event.js  | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/packages/react-native/src/private/webapis/dom/events/Event.js b/packages/react-native/src/private/webapis/dom/events/Event.js
index 6f616735af8d29..3a8dfb2dcd3c10 100644
--- a/packages/react-native/src/private/webapis/dom/events/Event.js
+++ b/packages/react-native/src/private/webapis/dom/events/Event.js
@@ -184,48 +184,56 @@ export default class Event {
 
 // $FlowExpectedError[cannot-write]
 Object.defineProperty(Event, 'NONE', {
+  configurable: true,
   enumerable: true,
   value: 0,
 });
 
 // $FlowExpectedError[cannot-write]
 Object.defineProperty(Event.prototype, 'NONE', {
+  configurable: true,
   enumerable: true,
   value: 0,
 });
 
 // $FlowExpectedError[cannot-write]
 Object.defineProperty(Event, 'CAPTURING_PHASE', {
+  configurable: true,
   enumerable: true,
   value: 1,
 });
 
 // $FlowExpectedError[cannot-write]
 Object.defineProperty(Event.prototype, 'CAPTURING_PHASE', {
+  configurable: true,
   enumerable: true,
   value: 1,
 });
 
 // $FlowExpectedError[cannot-write]
 Object.defineProperty(Event, 'AT_TARGET', {
+  configurable: true,
   enumerable: true,
   value: 2,
 });
 
 // $FlowExpectedError[cannot-write]
 Object.defineProperty(Event.prototype, 'AT_TARGET', {
+  configurable: true,
   enumerable: true,
   value: 2,
 });
 
 // $FlowExpectedError[cannot-write]
 Object.defineProperty(Event, 'BUBBLING_PHASE', {
+  configurable: true,
   enumerable: true,
   value: 3,
 });
 
 // $FlowExpectedError[cannot-write]
 Object.defineProperty(Event.prototype, 'BUBBLING_PHASE', {
+  configurable: true,
   enumerable: true,
   value: 3,
 });