From 52ca6f6569108c61260f467652cd2b88c955f3e2 Mon Sep 17 00:00:00 2001
From: Thomas Nardone <tnardone@meta.com>
Date: Wed, 8 May 2024 14:32:24 -0700
Subject: [PATCH] Enable synchronous scroll events (#44490)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/44490

Changelog: [internal]

Enable the experimental syncOnScroll flag in JS.

Reviewed By: sammy-SC

Differential Revision: D56886404

fbshipit-source-id: 6d5081cdcd319b73f0dc4329adc4e2cd7ba17139
---
 .../ScrollView/AndroidHorizontalScrollViewNativeComponent.js   | 1 +
 .../Components/ScrollView/ScrollViewNativeComponent.js         | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/react-native/Libraries/Components/ScrollView/AndroidHorizontalScrollViewNativeComponent.js b/packages/react-native/Libraries/Components/ScrollView/AndroidHorizontalScrollViewNativeComponent.js
index c99ea196ae3..bdaef9b9094 100644
--- a/packages/react-native/Libraries/Components/ScrollView/AndroidHorizontalScrollViewNativeComponent.js
+++ b/packages/react-native/Libraries/Components/ScrollView/AndroidHorizontalScrollViewNativeComponent.js
@@ -31,6 +31,7 @@ export const __INTERNAL_VIEW_CONFIG: PartialViewConfig = {
     pagingEnabled: true,
     persistentScrollbar: true,
     horizontal: true,
+    enableSyncOnScroll: true,
     scrollEnabled: true,
     scrollEventThrottle: true,
     scrollPerfTag: true,
diff --git a/packages/react-native/Libraries/Components/ScrollView/ScrollViewNativeComponent.js b/packages/react-native/Libraries/Components/ScrollView/ScrollViewNativeComponent.js
index 41a7f723878..aa4f79b921d 100644
--- a/packages/react-native/Libraries/Components/ScrollView/ScrollViewNativeComponent.js
+++ b/packages/react-native/Libraries/Components/ScrollView/ScrollViewNativeComponent.js
@@ -45,6 +45,7 @@ export const __INTERNAL_VIEW_CONFIG: PartialViewConfig =
             diff: require('../../Utilities/differ/pointsDiffer'),
           },
           decelerationRate: true,
+          enableSyncOnScroll: true, // Fabric only.
           disableIntervalMomentum: true,
           maintainVisibleContentPosition: true,
           pagingEnabled: true,
@@ -134,7 +135,7 @@ export const __INTERNAL_VIEW_CONFIG: PartialViewConfig =
           contentInsetAdjustmentBehavior: true,
           decelerationRate: true,
           endDraggingSensitivityMultiplier: true,
-          enableSyncOnScroll: true, // iOS-Fabric only.
+          enableSyncOnScroll: true, // Fabric only.
           directionalLockEnabled: true,
           disableIntervalMomentum: true,
           indicatorStyle: true,