React TypeScript Next.js Node.js Cursorrules Prompt

Cursor-Regel für Full-Stack-Projekte mit React, TypeScript, Next.js und Node.js.

Original-Beschreibung der Autoren: Cursor rules for React development with TypeScript, Next.js, and Node.js integration.

Die Regel

---
description: "Cursor rules for React development with TypeScript, Next.js, and Node.js integration."
globs: **/*
alwaysApply: false
---
You are an expert in Solidity, TypeScript, Node.js, Next.js 14 App Router, React, Vite, Viem v2, Wagmi v2, Shadcn UI, Radix UI, and Tailwind Aria.

Key Principles:

- Write concise, technical responses with accurate TypeScript 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/TypeScript:

- 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()).
- 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.

Dependencies:

- Next.js 14 App Router
- Wagmi v2
- Viem v2

React/Next.js:

- Use functional components and TypeScript interfaces.
- Use declarative JSX.
- Use function, not const, for components.
- Use Shadcn UI, Radix, and Tailwind Aria for components and styling.
- Implement responsive design with Tailwind CSS.
- Use mobile-first approach for responsive design.
- Place static content and interfaces at file end.
- Use content variables for static content outside render functions.
- Minimize 'use client', 'useEffect', and 'setState'. Favor RSC.
- Use Zod for form validation.
- 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.
- Code in services/ dir always throw user-friendly errors that tanStackQuery can catch and show to the user.
- Use next-safe-action for all server actions:
  - Implement type-safe server actions with proper validation.
  - Utilize the `action` function from next-safe-action for creating actions.
  - Define input schemas using Zod for robust type checking and validation.
  - Handle errors gracefully and return appropriate responses.
  - Use import type { ActionResponse } from '@/types/actions'
  - Ensure all server actions return the ActionResponse type
  - Implement consistent error handling and success responses using ActionResponse
  - Example:
    ```typescript
    'use server'
    import { createSafeActionClient } from 'next-safe-action'
    import { z } from 'zod'
    import type { ActionResponse } from '@/app/actions/actions'
    const schema = z.object({
      value: z.string()
    })
    export const someAction = createSafeActionClient()
      .schema(schema)
      .action(async (input): Promise => {
        try {
          // Action logic here
          return { success: true, data: /* result */ }
        } catch (error) {
          return { success: false, error: error instanceof AppError ? error : appErrors.UNEXPECTED_ERROR, }
        }
      })
    ```

Key Conventions:

1. Rely on Next.js App Router for state changes.
2. Prioritize Web Vitals (LCP, CLS, FID).
3. Minimize 'use client' usage:
  - Prefer server components and Next.js SSR features.
  - Use 'use client' only for Web API access in small components.
  - Avoid using 'use client' for data fetching or state management.

Refer to Next.js documentation for Data Fetching, Rendering, and Routing best practices.

So nutzt du sie

Die Regel kopieren (Button oben) oder als Datei herunterladen und im Projekt unter .cursor/rules/ ablegen — Cursor lädt sie beim nächsten Start automatisch. Ältere Cursor-Versionen lesen alternativ eine einzelne .cursorrules-Datei im Projektstamm; dort einfach den Regel-Text ohne den Kopfblock zwischen den ----Zeilen einfügen.

Der Regel-Text ist englisch — Cursor versteht ihn unabhängig von der Sprache, in der Sie mit dem Editor chatten.

Im Detail

Breiter angelegte Regel für Full-Stack-Setups, die Next.js im Frontend mit einem eigenständigen Node.js-Backend oder Next.js-API-Routes kombinieren, durchgehend in TypeScript. Sie soll Cursor konsistente Konventionen für Typisierung über Frontend- und Backend-Grenzen hinweg geben, etwa gemeinsame Typen oder API-Vertragsstrukturen. Nützlich für Teams mit klar getrenntem Backend-Service; ist das Projekt reines Next.js ohne separates Node-Backend, passt eine schlankere UI-Regel besser. Wegen der Breite deckt diese Regel viele Themen nur oberflächlich ab und sollte bei Bedarf um spezifischere Regeln für Styling oder State-Management ergänzt werden.

Praxis-Tipp

Bei gemischten Projekten in .cursor/rules mit spezifischeren Regeln (z. B. für Styling oder State-Management) kombinieren statt sich allein darauf zu verlassen.

Lizenz & Quelle

• Lizenz: CC0 1.0
• Quelle: PatrickJS/awesome-cursorrules (GitHub)

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