Enable the imperative EventTarget API in canary (#58479)

Summary:
Pull Request resolved: #58479

`enableImperativeEvents` was defined as a JS-only feature flag, but OSS release stages are only applied to common flags: `ossReleaseStage` is consumed exclusively by the generators that produce the native override classes, so setting it on a JS-only flag is silently a no-op. The feature could therefore never be shipped through the canary channel.

This defines `enableImperativeEvents` as a common flag at release stage `canary`, and renames the JS-only flag to `enableImperativeEvents_DEPRECATED`. The deprecated flag is kept because the common flag is read through the native module: a JS bundle delivered to a native build that predates this change finds no such method and falls back to the default, which would silently turn the feature off. The gate in `ReactNativeElement` and `ReadOnlyText` now keeps the public EventTarget methods when either flag is enabled.

Changelog:
[General][Added] - Enable the imperative EventTarget API (`addEventListener`, `removeEventListener`, `dispatchEvent`) on native view refs in canary

Reviewed By: javache

Differential Revision: D119645412

fbshipit-source-id: 4fd33dfaff1640fd5d40b5bc9c3f657ea7b3bb86
(cherry picked from commit 8480b86)

Author: rubennorte

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlags.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<b7ef80c2c39c734ae511fe6457b89ce7>>
+ * @generated SignedSource<<de19deb8eaa373fc2048f5a9453674b7>>
  */
 
 /**
@@ -216,6 +216,12 @@ public object ReactNativeFeatureFlags {
   @JvmStatic
   public fun enableImmediateUpdateModeForContentOffsetChanges(): Boolean = accessor.enableImmediateUpdateModeForContentOffsetChanges()
 
+  /**
+   * When enabled, ReactNativeElement and ReadOnlyText expose the public EventTarget API (addEventListener, removeEventListener, dispatchEvent). When disabled, those methods are removed from those final classes.
+   */
+  @JvmStatic
+  public fun enableImperativeEvents(): Boolean = accessor.enableImperativeEvents()
+
   /**
    * Enable ref.focus() and ref.blur() for all views, not just TextInput.
    */

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<68aefd0293540d56f57e8badc0de04c8>>
+ * @generated SignedSource<<a1c52a57a980eaab23d92416340a6734>>
  */
 
 /**
@@ -51,6 +51,7 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
   private var enableImagePrefetchingAndroidCache: Boolean? = null
   private var enableImageTransparentTintColorCache: Boolean? = null
   private var enableImmediateUpdateModeForContentOffsetChangesCache: Boolean? = null
+  private var enableImperativeEventsCache: Boolean? = null
   private var enableImperativeFocusCache: Boolean? = null
   private var enableInteropViewManagerClassLookUpOptimizationIOSCache: Boolean? = null
   private var enableIntersectionObserverByDefaultCache: Boolean? = null
@@ -386,6 +387,15 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
     return cached
   }
 
+  override fun enableImperativeEvents(): Boolean {
+    var cached = enableImperativeEventsCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.enableImperativeEvents()
+      enableImperativeEventsCache = cached
+    }
+    return cached
+  }
+
   override fun enableImperativeFocus(): Boolean {
     var cached = enableImperativeFocusCache
     if (cached == null) {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxInterop.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<247f721796621af8615014477518bcd9>>
+ * @generated SignedSource<<8a0d1f134b175ada7550499896c09203>>
  */
 
 /**
@@ -90,6 +90,8 @@ public object ReactNativeFeatureFlagsCxxInterop {
 
   @DoNotStrip @JvmStatic public external fun enableImmediateUpdateModeForContentOffsetChanges(): Boolean
 
+  @DoNotStrip @JvmStatic public external fun enableImperativeEvents(): Boolean
+
   @DoNotStrip @JvmStatic public external fun enableImperativeFocus(): Boolean
 
   @DoNotStrip @JvmStatic public external fun enableInteropViewManagerClassLookUpOptimizationIOS(): Boolean

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsDefaults.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<33071257f9c96a8664c9af429e387061>>
+ * @generated SignedSource<<891abee69433c105d062b45ed357fd5c>>
  */
 
 /**
@@ -85,6 +85,8 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi
 
   override fun enableImmediateUpdateModeForContentOffsetChanges(): Boolean = false
 
+  override fun enableImperativeEvents(): Boolean = false
+
   override fun enableImperativeFocus(): Boolean = false
 
   override fun enableInteropViewManagerClassLookUpOptimizationIOS(): Boolean = false

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsLocalAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<f218220c66b8367211cae49adba46afc>>
+ * @generated SignedSource<<4c62625780d9f767714f8481c7496342>>
  */
 
 /**
@@ -55,6 +55,7 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
   private var enableImagePrefetchingAndroidCache: Boolean? = null
   private var enableImageTransparentTintColorCache: Boolean? = null
   private var enableImmediateUpdateModeForContentOffsetChangesCache: Boolean? = null
+  private var enableImperativeEventsCache: Boolean? = null
   private var enableImperativeFocusCache: Boolean? = null
   private var enableInteropViewManagerClassLookUpOptimizationIOSCache: Boolean? = null
   private var enableIntersectionObserverByDefaultCache: Boolean? = null
@@ -421,6 +422,16 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
     return cached
   }
 
+  override fun enableImperativeEvents(): Boolean {
+    var cached = enableImperativeEventsCache
+    if (cached == null) {
+      cached = currentProvider.enableImperativeEvents()
+      accessedFeatureFlags.add("enableImperativeEvents")
+      enableImperativeEventsCache = cached
+    }
+    return cached
+  }
+
   override fun enableImperativeFocus(): Boolean {
     var cached = enableImperativeFocusCache
     if (cached == null) {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsOverrides_RNOSS_Canary_Android.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<22ab94c6b0cc8f7ee39d546d9b93540a>>
+ * @generated SignedSource<<843b2fa7e358dd73c9db083e42b93be6>>
  */
 
 /**
@@ -27,6 +27,8 @@ public open class ReactNativeFeatureFlagsOverrides_RNOSS_Canary_Android : ReactN
 
   override fun enableAccessibilityOrder(): Boolean = true
 
+  override fun enableImperativeEvents(): Boolean = true
+
   override fun enableIntersectionObserverByDefault(): Boolean = true
 
   override fun enableSwiftUIBasedFilters(): Boolean = true

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsProvider.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<915bf918212b9898319de61d4cadaa13>>
+ * @generated SignedSource<<e991f910f4be27f532c6b81c436bcdf1>>
  */
 
 /**
@@ -85,6 +85,8 @@ public interface ReactNativeFeatureFlagsProvider {
 
   @DoNotStrip public fun enableImmediateUpdateModeForContentOffsetChanges(): Boolean
 
+  @DoNotStrip public fun enableImperativeEvents(): Boolean
+
   @DoNotStrip public fun enableImperativeFocus(): Boolean
 
   @DoNotStrip public fun enableInteropViewManagerClassLookUpOptimizationIOS(): Boolean

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<177c5cc7f6e970a2d4454c32d7f777ef>>
+ * @generated SignedSource<<dc98fadf7aac306d7cdb4f5ab511f690>>
  */
 
 /**
@@ -225,6 +225,12 @@ class ReactNativeFeatureFlagsJavaProvider
     return method(javaProvider_);
   }
 
+  bool enableImperativeEvents() override {
+    static const auto method =
+        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableImperativeEvents");
+    return method(javaProvider_);
+  }
+
   bool enableImperativeFocus() override {
     static const auto method =
         getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableImperativeFocus");
@@ -714,6 +720,11 @@ bool JReactNativeFeatureFlagsCxxInterop::enableImmediateUpdateModeForContentOffs
   return ReactNativeFeatureFlags::enableImmediateUpdateModeForContentOffsetChanges();
 }
 
+bool JReactNativeFeatureFlagsCxxInterop::enableImperativeEvents(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::enableImperativeEvents();
+}
+
 bool JReactNativeFeatureFlagsCxxInterop::enableImperativeFocus(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
   return ReactNativeFeatureFlags::enableImperativeFocus();
@@ -1113,6 +1124,9 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
       makeNativeMethod(
         "enableImmediateUpdateModeForContentOffsetChanges",
         JReactNativeFeatureFlagsCxxInterop::enableImmediateUpdateModeForContentOffsetChanges),
+      makeNativeMethod(
+        "enableImperativeEvents",
+        JReactNativeFeatureFlagsCxxInterop::enableImperativeEvents),
       makeNativeMethod(
         "enableImperativeFocus",
         JReactNativeFeatureFlagsCxxInterop::enableImperativeFocus),

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<eab10e240a16c8ef3f659bd8ded290f0>>
+ * @generated SignedSource<<c17b71e1b754ff1773bb370681de06e4>>
  */
 
 /**
@@ -123,6 +123,9 @@ class JReactNativeFeatureFlagsCxxInterop
   static bool enableImmediateUpdateModeForContentOffsetChanges(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 
+  static bool enableImperativeEvents(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
   static bool enableImperativeFocus(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<7b726d7483bb35062b79e582323f0d7e>>
+ * @generated SignedSource<<023b0be9315450130aac118c65ac53eb>>
  */
 
 /**
@@ -150,6 +150,10 @@ bool ReactNativeFeatureFlags::enableImmediateUpdateModeForContentOffsetChanges()
   return getAccessor().enableImmediateUpdateModeForContentOffsetChanges();
 }
 
+bool ReactNativeFeatureFlags::enableImperativeEvents() {
+  return getAccessor().enableImperativeEvents();
+}
+
 bool ReactNativeFeatureFlags::enableImperativeFocus() {
   return getAccessor().enableImperativeFocus();
 }