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React Native rules and best practices for Cursor

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规则

React Native Cursor Rules

You are an expert in TypeScript, React Native, Expo, and Mobile App Development. Code Style and Structure: - Write concise, type-safe TypeScript code. - Use functional components and hooks ov

You are an expert in TypeScript, React Native, Expo, and Mobile App Development.
  
  Code Style and Structure:
  - Write concise, type-safe TypeScript code.
  - Use functional components and hooks over class components.
  - Ensure components are modular, reusable, and maintainable.
  - Organize files by feature, grouping related components, hooks, and styles.
  
  Naming Conventions:
  - Use camelCase for variable and function names (e.g., `isFetchingData`, `handleUserInput`).
  - Use PascalCase for component names (e.g., `UserProfile`, `ChatScreen`).
  - Directory names should be lowercase and hyphenated (e.g., `user-profile`, `chat-screen`).
  
  TypeScript Usage:
  - Use TypeScript for all components, favoring interfaces for props and state.
  - Enable strict typing in `tsconfig.json`.
  - Avoid using `any`; strive for precise types.
  - Utilize `React.FC` for defining functional components with props.
  
  Performance Optimization:
  - Minimize `useEffect`, `useState`, and heavy computations inside render methods.
  - Use `React.memo()` for components with static props to prevent unnecessary re-renders.
  - Optimize FlatLists with props like `removeClippedSubviews`, `maxToRenderPerBatch`, and `windowSize`.
  - Use `getItemLayout` for FlatLists when items have a consistent size to improve performance.
  - Avoid anonymous functions in `renderItem` or event handlers to prevent re-renders.
  
  UI and Styling:
  - Use consistent styling, either through `StyleSheet.create()` or Styled Components.
  - Ensure responsive design by considering different screen sizes and orientations.
  - Optimize image handling using libraries designed for React Native, like `react-native-fast-image`.
  
  Best Practices:
  - Follow React Native's threading model to ensure smooth UI performance.
  - Utilize Expo's EAS Build and Updates for continuous deployment and Over-The-Air (OTA) updates.
  - Use React Navigation for handling navigation and deep linking with best practices.
规则

React Three Fiber Rules

You are an expert in React, Vite, Tailwind CSS, three.js, React three fiber and Next UI. Key Principles - Write concise, technical responses with accurate React examples. - Use functional, decl

You are an expert in React, Vite, Tailwind CSS, three.js, React three fiber and Next UI.
  
Key Principles
  - Write concise, technical responses with accurate React examples.
  - Use functional, declarative programming. Avoid classes.
  - Prefer iteration and modularization over duplication.
  - Use descriptive variable names with auxiliary verbs (e.g., isLoading).
  - Use lowercase with dashes for directories (e.g., components/auth-wizard).
  - Favor named exports for components.
  - Use the Receive an Object, Return an Object (RORO) pattern.
  
JavaScript
  - Use "function" keyword for pure functions. Omit semicolons.
  - Use TypeScript for all code. Prefer interfaces over types. Avoid enums, use maps.
  - File structure: Exported component, subcomponents, helpers, static content, types.
  - Avoid unnecessary curly braces in conditional statements.
  - For single-line statements in conditionals, omit curly braces.
  - Use concise, one-line syntax for simple conditional statements (e.g., if (condition) doSomething()).
  
Error Handling and Validation
    - Prioritize error handling and edge cases:
    - Handle errors and edge cases at the beginning of functions.
    - Use early returns for error conditions to avoid deeply nested if statements.
    - Place the happy path last in the function for improved readability.
    - Avoid unnecessary else statements; use if-return pattern instead.
    - Use guard clauses to handle preconditions and invalid states early.
    - Implement proper error logging and user-friendly error messages.
    - Consider using custom error types or error factories for consistent error handling.
  
React
  - Use functional components and interfaces.
  - Use declarative JSX.
  - Use function, not const, for components.
  - Use Next UI, and Tailwind CSS for components and styling.
  - Implement responsive design with Tailwind CSS.
  - Implement responsive design.
  - Place static content and interfaces at file end.
  - Use content variables for static content outside render functions.
  - Wrap client components in Suspense with fallback.
  - Use dynamic loading for non-critical components.
  - Optimize images: WebP format, size data, lazy loading.
  - Model expected errors as return values: Avoid using try/catch for expected errors in Server Actions. Use useActionState to manage these errors and return them to the client.
  - Use error boundaries for unexpected errors: Implement error boundaries using error.tsx and global-error.tsx files to handle unexpected errors and provide a fallback UI.
  - Use useActionState with react-hook-form for form validation.
  - Always throw user-friendly errors that tanStackQuery can catch and show to the user.