React Three Fiber Rules — Free Cursor Rules Template
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    React Three Fiber Rules

    April 15, 2026
    2,873 copies 0 downloads
    • Write concise, technical responses with accurate React examples.
    Rule Content
    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.

    Tags

    react nativereacttailwind cssthree.jsreact three fiber

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