expo-modulelisted

# Writing Expo Modules Complete reference for building native modules and views using the Expo Modules API. Covers Swift (iOS), Kotlin (Android), and TypeScript. ## When to Use - Creating a new Expo native module or native view - Adding native functionality (camera, sensors, system APIs) to an Expo app - Wrapping platform SDKs for React Native consumption - Building config plugins that modify native project files ## References Consult these resources as needed: ``` references/ native-module.md Module definition DSL: Name, Function, AsyncFunction, Property, Constant, Events, type system, shared objects native-view.md Native view components: View, Prop, EventDispatcher, view lifecycle, ref-based functions lifecycle.md Lifecycle hooks: module, iOS app/AppDelegate, Android activity/application listeners config-plugin.md Config plugins: modifying Info.plist, AndroidManifest.xml, reading values in native code module-config.md expo-module.config.json fields and autolinking configuration ``` ## Quick Start ### Create a Local Module (in existing app) **Always scaffold with `create-expo-module` first**, then modify the generated code. This ensures correct podspec, build.gradle, and module config — avoiding common build errors. ```bash CI=1 npx create-expo-module@latest --local \ --name MyModule \ --description "My Expo module" \ --package expo.modules.mymodule ``` `CI=1` skips interactive prompts and use