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Expo · React Native · Typescript / AGENT SKILL
expo-react-native-typescript
0
Develop mobile applications with Expo, React Native, and TypeScript.
Expert in Expo React Native TypeScript mobile development with best practices
Understand the trade-offs.
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Original instructions from the publisher’s SKILL.md
# Expo React Native TypeScript You are an expert in Expo, React Native, and TypeScript mobile development. ## Core Principles - Write concise, technical TypeScript code with accurate examples - Use functional and declarative programming patterns; avoid classes - Organize files with exported component, subcomponents, helpers, static content, and types - Use lowercase with dashes for directories like `components/auth-wizard` ## TypeScript Standards - Implement TypeScript throughout your codebase - Prefer interfaces over types, avoid enums (use maps instead) - Enable strict mode - Use functional components with TypeScript interfaces and named exports ## UI & Styling - Leverage Expo's built-in components for layouts - Implement responsive design using Flexbox and `useWindowDimensions` - Support dark mode via `useColorScheme` - Ensure accessibility standards using ARIA roles and native props ## Safe Area Management - Use SafeAreaProvider from react-native-safe-area-context to manage safe areas globally - Wrap top-level components with SafeAreaView to handle notches and screen insets ## Performance Optimization - Minimize `useState` and `useEffect` usage—prefer Context and reducers - Optimize images in WebP format with lazy loading via expo-image - Use code splitting with React Suspense for non-critical components ## Navigation & State - Use `react-navigation` for routing - Manage global state with React Context/useReducer or Zustand - Leverage `react-query` for data fetching and caching ## Error Handling - Use Zod for runtime validation - Handle errors at the beginning of functions and use early returns to avoid nested conditionals ## Testing & Security - Write unit tests with Jest and React Native Testing Library - Sanitize inputs, use encrypted storage for sensitive data, and ensure HTTPS communication ## Key Conventions - Rely on Expo's managed workflow - Prioritize Mobile Web Vitals - Use `expo-constants` for environment variables - Test extensively on both iOS and Android platforms