Release 0.35.0

0.35.0 (2026-03-04)

❗️ Breaking Change

#1238 is the first breaking change after >1 year in Nitro. Unfortunately it is necessary, as it fixes a critical memory leak in Kotlin HybridObjects.

• For app developers: Try upgrading to Nitro 0.35.x and attempt a build. If it fails due to anything looking like super.updateNative(...), JHybridObject, HybridBase, or AnyMapHolder, the Nitro library you are using needs to update to Nitro 0.35.x as well and re-generate their specs. Swift and C++ libraries will work fine, only Kotlin HybridObjects have a breaking change.
• For library authors: Upgrade to Nitro 0.35.x (and nitrogen 0.35.x), and re-generate your specs. Follow these steps to migrate your library:
  1. Re-generating specs will automatically make your library compatible and implements the JHybridObject change.
  2. If you use bigint in your specs, replace it with either Int64 or UInt64:

      interface Math extends HybridObject<...> {
     -  calculateFibonacci(n: bigint): bigint
     +  calculateFibonacci(n: UInt64): UInt64
      }

     See #1212 for more information.
  3. Replace your JNI initialization (cpp-adapter.cpp or JNIOnLoad.cpp) with this:

      JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void*) {
     -  return margelo::nitro::$$androidNamespace$$::initialize(vm);
     +  return facebook::jni::initialize(vm, []() {
     +    margelo::nitro::$$androidNamespace$$::registerAllNatives();
     +  });
      }

  As an example, take a look at react-native-nitro-image: PR #103 for a guideline on how to upgrade.

🐛 Bug Fixes

• Remove a bunch of deprecated APIs (#1245) (0cd8eea)
• Don't strip HybridSomeExternalObject (f9da753)
• Fix Kotlin HybridObject jni::global_ref memory leak by separating CxxPart with weak_ptr (#1238) (32a4c86), closes #1239

Release 0.35.0-beta.0

0.35.0-beta.0 (2026-03-03)

❗️ Breaking Change

I think the change in JHybridObject is breaking. I will test (and potentially improve) this before making 0.35.0 stable.
Library authors need to re-generate their specs to support 0.35.0 onwards.

🐛 Bug Fixes

• Don't strip HybridSomeExternalObject (f9da753)
• Fix Kotlin HybridObject jni::global_ref memory leak by separating CxxPart with weak_ptr (#1238) (32a4c86), closes #1239

📚 Documentation

• Add new module react-native-nitro-version-check to the Nitro Modules documentation (#1230) (1a70829)

Release 0.34.1

0.34.1 (2026-02-27)

🐛 Bug Fixes

• Fix HardwareBuffer isCPUReadable check (42f6394)

Release 0.34.0

0.34.0 (2026-02-26)

❗️ JNI OnLoad (cpp-adapter.cpp) change

For library authors: In your JNI OnLoad function (often in cpp-adapter.cpp), you should migrate to the new initialization API:

 JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void*) {
-  return margelo::nitro::$$androidNamespace$$::initialize(vm);
+  return facebook::jni::initialize(vm, []() {
+    margelo::nitro::$$androidNamespace$$::registerAllNatives();
+  });
 }

Nothing really changes if you don't register any custom native JNI classes/functions, and it will also not break if you don't migrate. But it is recommended either way, as this new API allows you to create custom C++ native JNI classes/functions and register them.

✨ Features

• Add createNativeArrayBuffer(size) to NitroModulesProxy (#1226) (c2b4ba4)
• Add lambda argument for custom JNI registrations in initialize…(...) (#1222) (8dde8b8)

🐛 Bug Fixes

• Fall back to ByteBuffer copy if HardwareBuffer copy fails (513a50b)
• Fix has*/is* property names being simplified on Swift/Kotlin (#1223) (47e867d)
• Fix AnyMap canConvert to check values instead of keys (#1163) (23cccba)
• Rename initialize() to registerAllNatives() to be more aligned with fbjni (#1225) (3d4070b)
• Test both C++ and Swift/Kotlin Test Objects with Harness (#1224) (c3d7839)
• Throw if HardwareBuffer-backed ArrayBuffer is non-CPU-readable (#1227) (63aa30c)
• Use AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN instead of AHARDWAREBUFFER_USAGE_CPU_WRITE_MASK (044b7fd)

Release 0.33.9

0.33.9 (2026-02-12)

🐛 Bug Fixes

• Fix optional<double> failing to build in release in Swift (#1215) (e29f58c)

📚 Documentation

• add react-native-google-maps-plus to awesome nitro modules list (#1211) (abb96d4)

Release 0.33.8

0.33.8 (2026-02-10)

✨ Features

• Expose Int64 and UInt64 - deprecate bigint (#1212) (a42b35e)

🐛 Bug Fixes

• Fix accidentally converting bigints to double (6728fbf)

📚 Documentation

• add react-native-superconfig (#1208) (3b8e089)

Release 0.33.7

0.33.7 (2026-02-04)

🐛 Bug Fixes

• Fix typo (710305d)
• Fix AnyMap not overwriting keys (#1204) (7c5666c)
• Fix PropNameIDCache not overwriting stale values in cache (#1203) (52ae0c2)

Release 0.33.6

0.33.6 (2026-02-04)

🐛 Bug Fixes

• Fix AnyMap not overwriting keys (#1204) (7c5666c)
• Fix PropNameIDCache not overwriting stale values in cache (#1203) (52ae0c2)

Release 0.33.5

0.33.5 (2026-02-03)

🐛 Bug Fixes

• Run ThreadUtils::setThreadName(...) under jni::ThreadScope (#1200) (ecc8c2d)

Release 0.33.4

0.33.4 (2026-02-03)

💨 Performance Improvements

• Set isDirty to false to avoid JNI roundtrips (#1195) (67d45a4)

🐛 Bug Fixes

• Fix NitroModulesSpec.h import for use_frameworks (#1196) (281afe8)