From 28e6d89c0ab931f9efbae495d4dbe4088e11eb94 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rub=C3=A9n=20Norte?= <rubennorte@meta.com>
Date: Thu, 29 Feb 2024 14:16:16 +0000
Subject: [PATCH] [RN] Use microtasks when using bridgeless mode in React
 Native Fabric renderer (OSS version)

---
 .eslintrc.js                                          | 2 ++
 packages/shared/forks/ReactFeatureFlags.native-oss.js | 5 ++++-
 scripts/flow/xplat.js                                 | 3 +++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/.eslintrc.js b/.eslintrc.js
index eaad9393c5685..a636db4736a11 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -533,5 +533,7 @@ module.exports = {
     AsyncLocalStorage: 'readonly',
     async_hooks: 'readonly',
     globalThis: 'readonly',
+
+    RN$Bridgeless: 'readonly',
   },
 };
diff --git a/packages/shared/forks/ReactFeatureFlags.native-oss.js b/packages/shared/forks/ReactFeatureFlags.native-oss.js
index dcc8fd7b95f24..bd870f125a9f0 100644
--- a/packages/shared/forks/ReactFeatureFlags.native-oss.js
+++ b/packages/shared/forks/ReactFeatureFlags.native-oss.js
@@ -82,7 +82,10 @@ export const enableAsyncActions = false;
 
 export const alwaysThrottleRetries = false;
 
-export const useMicrotasksForSchedulingInFabric = false;
+const isBridgeless: boolean =
+  typeof RN$Bridgeless !== 'undefined' && !!RN$Bridgeless;
+
+export const useMicrotasksForSchedulingInFabric = isBridgeless;
 export const passChildrenWhenCloningPersistedNodes = false;
 export const enableUseDeferredValueInitialArg = __EXPERIMENTAL__;
 export const disableClientCache = true;
diff --git a/scripts/flow/xplat.js b/scripts/flow/xplat.js
index cc5bc16b82cc5..a2baf2f7bf85c 100644
--- a/scripts/flow/xplat.js
+++ b/scripts/flow/xplat.js
@@ -7,6 +7,9 @@
  * @flow
  */
 
+// eslint-disable-next-line no-unused-vars
+declare const RN$Bridgeless: boolean;
+
 declare module 'ReactNativeInternalFeatureFlags' {
   declare export var alwaysThrottleRetries: boolean;
   declare export var enableComponentStackLocations: boolean;