Expo Native Module

---
name: expo-module
description: Guide for creating and writing Expo native modules and views using the Expo Modules API (Swift, Kotlin, TypeScript). Covers module definition DSL, native views, shared objects, config plugins, lifecycle hooks, autolinking, and type system. Use when building or modifying native modules for Expo.
version: 1.0.0
license: MIT
---

# 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
- Adding Android, Apple, or web support to an existing Expo module
- Editing `expo-module.config.json`, config plugins, or lifecycle hooks

## References

Consult these resources as needed:

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