React-native link

Many (but not all) react-native npm packages that are added/installed into a project are Native Bridges. If the package is a pure JS package, then it is just that – pure JavaScript. If a react-native package contains an `ios` directory and an `android` directory, it is most-likely a Native Bridge .

Native Bridge is implemented as a part of Android Runtime (ART) in the Android architecture. It is used to support running native libraries in a different processor architecture so that an application with native libraries can run on a broader range of devices .

If you are wondering, RCT is an abbreviation of ReaCT . In addition to implementing the RCTBridgeModule protocol, your class must also include the RCT_EXPORT_MODULE() macro. This takes an optional argument that specifies the name that the module will be accessible as in your JavaScript code (more on this later).

React Native bridge is asynchronous , so the only way to pass a result to JavaScript is by using callbacks or emitting events (see below).

React Native is a framework that allows developers to use a single JavaScript codebase to build apps for that function on both iOS and Android devices . Unlike in the case of native apps, cross-platform app development allows apps to run on both types of devices without requiring two sets of coding.