Nitro Modules are highly efficient native modules with a statically compiled binding layer to JSI, and typesafe JS bindings. It consists of two parts:

• react-native-nitro-modules: The core C++ library powering all nitro modules
• nitrogen: A code-generator for nitro module library authors

Declaration (TypeScript):

export interface Math extends HybridObject {
  add(a: number, b: number): number
}

Implementation (C++, Swift or Kotlin):

class HybridMath: public HybridMathSpec {
public:
  double add(double a, double b) override {
    return a + b;
  }
}

Usage (TypeScript):

const math = NitroModules.createHybridObject<Math>('Math')
const result = math.add(5, 3)

Install react-native-nitro-modules from npm:

npm i react-native-nitro-modules
cd ios && pod install

• Nitro docs 📚
• Community Discord 💬
• nitrogen/README.md
• react-native-nitro-modules/README.md
• react-native-nitro-test example module
• TestObject.nitro.ts example playground

Cross-platform native modules can be built with C++. Any custom C++ types can be used and bridged to JS with minimal overhead.

JS <-> C++ type converters are statically generated ahead of time - no more dynamic lookups or runtime parser errors! 🥳

iOS native modules and view components can be written either in pure C++, or pure Swift. Thanks to Swift 5.9, Swift Nitro Modules bridge directly to C++ instead of going through Objective-C message sends. Woohoo, no more Objective-C, and zero overhead C++ -> Swift calls! 🥳

Android native modules and view components can be written either in pure C++, or pure Kotlin/Java. Thanks to fbjni, even complex types can be effortlessly bridged to Kotlin/Java with minimal overhead! 🔥

Nitro is built with ❤️ by Margelo. We build fast and beautiful apps. Contact us at margelo.com for consultancy services.

See the contributing guide to learn how to contribute to the repository and the development workflow.

MIT