Adding fix for Manual set value clearTextOnSubmit-style behavior not working on Fabric

change/react-native-windows-daac39ef-4292-4f66-81ae-708b1c0f6676.json

@@ -0,0 +1,7 @@
+{
+  "comment": "adding fix for TextInput",
+  "type": "prerelease",
+  "packageName": "react-native-windows",
+  "email": "[email protected]",
+  "dependentChangeType": "patch"
+}

vnext/Microsoft.ReactNative/Fabric/Composition/TextInput/WindowsTextInputComponentView.cpp

@@ -11,6 +11,8 @@
 #include <Fabric/platform/react/renderer/graphics/PlatformColorUtils.h>
 #include <Utils/ThemeUtils.h>
 #include <Utils/ValueUtils.h>
+#include <react/renderer/attributedstring/AttributedString.h>
+#include <react/renderer/attributedstring/AttributedStringBox.h>
 #include <react/renderer/components/textinput/TextInputState.h>
 #include <react/renderer/graphics/HostPlatformColor.h>
 #include <react/renderer/textlayoutmanager/WindowsTextLayoutManager.h>
@@ -541,7 +543,10 @@ void WindowsTextInputComponentView::HandleCommand(
     std::optional<winrt::hstring> text;
 
     winrt::Microsoft::ReactNative::ReadArgs(args.CommandArgs(), eventCount, text, begin, end);
-    if (eventCount >= m_nativeEventCount) {
+    // Allow text updates that are very close to the current native event count
+    // This handles the case where JavaScript immediately calls setValue during onSubmitEditing
+    // In that case, eventCount might be one less than m_nativeEventCount due to timing
+    if (eventCount >= m_nativeEventCount - 1) {
       m_comingFromJS = true;
       {
         if (text.has_value()) {
@@ -961,6 +966,13 @@ void WindowsTextInputComponentView::OnCharacterReceived(
     if (m_clearTextOnSubmit) {
       // clear text from RichEdit
       m_textServices->TxSetText(L"");
+      // Also update the state to reflect the cleared text
+      // This ensures consistency between native and JS state
+      auto data = m_state->getData();
+      data.attributedStringBox = facebook::react::AttributedStringBox{facebook::react::AttributedString{}};
+      data.mostRecentEventCount = m_nativeEventCount;
+
+      m_state->updateState(std::move(data));
     }
     return;
   }