Fix event dispatch names for momentum scroll (#12278)

rozele · web-flow · commit 1367b74599cc · 2023-10-23T15:59:02.000Z
* Fix event dispatch names for momentum scroll In 03701dc, we replaced the ViewManager configured event names to match the ones used by Fabric, but never changed the events that get dispatched on Paper. * Change files
diff --git a/change/react-native-windows-8941aec1-77a9-412b-947c-ce6c8f8b6f54.json b/change/react-native-windows-8941aec1-77a9-412b-947c-ce6c8f8b6f54.json
@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Fix event dispatch names for momentum scroll",
+  "packageName": "react-native-windows",
+  "email": "ericroz@meta.com",
+  "dependentChangeType": "patch"
+}
diff --git a/vnext/Microsoft.ReactNative/Views/ScrollViewManager.cpp b/vnext/Microsoft.ReactNative/Views/ScrollViewManager.cpp
@@ -256,7 +256,7 @@ void ScrollViewShadowNode::AddHandlers(const winrt::ScrollViewer &scrollViewer)
           EmitScrollEvent(
               scrollViewerNotNull,
               m_tag,
-              L"topScrollBeginMomentum",
+              L"topMomentumScrollBegin",
               args.NextView().HorizontalOffset(),
               args.NextView().VerticalOffset(),
               args.NextView().ZoomFactor(),
@@ -299,7 +299,7 @@ void ScrollViewShadowNode::AddHandlers(const winrt::ScrollViewer &scrollViewer)
           EmitScrollEvent(
               scrollViewer,
               m_tag,
-              L"topScrollEndMomentum",
+              L"topMomentumScrollEnd",
               scrollViewer.HorizontalOffset(),
               scrollViewer.VerticalOffset(),
               scrollViewer.ZoomFactor(),
