Convert a NextJS project to Remix, all ai models are unable to do it with a lot of headache

Discussion
1

I wanted to ask if someone has tried to convert a nextJS application into a remix one?

I have setup specific rules for converting nextJS to remix application put the docs to remix in cursor but it just to complex task to proceed and burns all my premium credits in an instant.

I used sonnet 3.7 with thinking in agent mode trying to convert the project 1 component at a time. Refactored my nextJS application with v0 to use the private folder system which puts everything under routes/feature/_components _lib etc.

But still I wish i could just convert this nextJS project in 1 go fairly easy with cursor the hopes for that are now kinda gone spend hours on it burning 3 free trail account credits untill i had to upgrade to pro. Without pro you seem to be unable to even do slow requests I think some change recently>?

I understand the requests takes money but like this its getting really expensive and no good results.

Any way if anyone has any ideas on how how i Could convert NextJS to remix more properly i would love to hear.

These are my cursor rules:

Below is an enhanced version of your ruleset that incorporates additional examples and guidelines drawn directly from the Remix and Conform documentation. The new sections under “Remix” and “Conform” include code samples and best practices as described in the official docs.

---

## 1. Style and Structure

### 1.0 React Component Conventions
- **CamelCase:** Always use CamelCase for React component names.  
  _Example:_  
  ```tsx
  // Good:
  export function UserProfile() { ... }
  // Bad:
  export function userprofile() { ... }

1.1 Naming Conventions & Directory Structure

  • Directories: Use lowercase with dashes (e.g., components/auth-wizard).
  • Variables: Use descriptive names with auxiliary verbs (e.g., isLoading, hasError).
  • Exports: Favor named exports for components and helper functions.
  • File Organization: New files should follow this structure:
    • Exported component
    • Subcomponents
    • Helpers
    • Static content
    • Types
  • No Index Files: Do not create index files in the root of folders that re-export components.
    Example:
    Instead of:
    // components/auth-wizard/index.ts
export { AuthWizard } from './AuthWizard';
    Import directly:
    import { AuthWizard } from 'components/auth-wizard/AuthWizard';

1.2 TypeScript Usage

  • Language: All code must be written in TypeScript.
  • Interfaces vs. Types: Prefer interfaces over types for data contracts.
  • Enums: Avoid enums; use maps instead.
  • Components: Use functional components with TypeScript interfaces.
    Example (from Remix style):
    interface ButtonProps {
  onClick: () => void;
  label: string;
}

export const Button: React.FC<ButtonProps> = ({ onClick, label }) => (
  <button onClick={onClick}>{label}</button>
);

1.3 UI and Styling

  • Styling Framework: Use Tailwind CSS.
  • Component Imports:
    • Import app-specific components from <app_package_alias>@/components</app_package_alias>.
  • Form Library: When using the Conform form library, ensure components strictly adhere to its APIs and patterns.
    Example (from Conform docs):
    import { useForm } from 'conform';

export function LoginForm() {
  const [formProps, { error }] = useForm({
    initialValues: { email: '' },
    onSubmit: async (values) => {
      // handle submission
    },
  });

  return (
    <form {...formProps}>
      <input type="email" name="email" placeholder="Email" />
      {error && <p className="text-red-500">{error}</p>}
      <button type="submit" className="btn-primary">Login</button>
    </form>
  );
}

1.4 Performance Optimization

  • Data Structures: Favor immutable data structures.
  • Fetching & Rendering: Optimize data fetching, network requests, and rendering.
  • State Management: Use efficient state management strategies.
  • General: Optimize new code for performance from the start.

2. Cursor Rules for Component Creation (React & Remix)

2.1 Component Design

  • Purpose & Functionality: Clearly define the component’s purpose, design, and required behavior.
  • Remix Specifics: For Remix pages/components, include loaders, actions, and error boundaries per Remix best practices.
    Example (from Remix docs):
    import type { LoaderFunction } from '@remix-run/node';
import { json } from '@remix-run/node';

export const loader: LoaderFunction = async ({ params }) => {
  const user = await getUser(params.userId);
  return json({ user });
};

export function ErrorBoundary({ error }: { error: Error }) {
  console.error(error);
  return <div>Something went wrong!</div>;
}

2.2 Component Existence Check

  • Search Locations: Verify similar components in:
    • packages/ui/src/components
    • apps/spa/src/components

2.3 Prompt Generation for New Components

  • Details to Include:
    • Component name and purpose.
    • Expected props and their types.
    • Specific styling or behavior requirements (remember Tailwind CSS and TypeScript usage).
    • Remix-specific behaviors (loaders, actions, meta functions) and Conform form commands.
  • URL Encoding & Linking:
    • URL-encode the detailed prompt.
    • Generate a clickable link in this format:
      [ComponentName](https://chat.example.com?q={encoded_prompt})

2.4 Project Adaptation

  • Import Statements:
    • Common components: <ui_package_alias>@repo/ui/components/ui/</ui_package_alias>.
    • App-specific components: <app_package_alias>@/components</app_package_alias>.
  • Pattern Consistency: Follow existing component patterns.
  • Additional Logic: Incorporate any custom logic, state management, or Remix-specific routing/data functions.

Example Prompt Template:

“Create a React component named {ComponentName} using TypeScript and Tailwind CSS. It should {description of functionality}. Props should include {list of props with types}. The component should {any specific styling or behavior notes}. For Remix usage, include proper loader/action functions where needed. For forms, use the Conform form library and its conventions. Please provide the full component code.”

3. Response Constraints

3.1 Code Preservation

  • No Unnecessary Removal: Keep existing code unless removal is absolutely required.
  • Maintain Comments: Preserve user comments and any commented-out code.
  • Import Formatting: Only change import formatting if vital for new functionality.

3.2 Code Style & Structure

  • Conciseness: Write concise, technical TypeScript code with accurate examples.
  • Functional Patterns: Use functional and declarative programming patterns; avoid classes.
  • Modularization: Prefer modular approaches over duplicative code.
  • File Structure: Organize files as: exported components, subcomponents, helpers, static content, and types.

3.3 Remix & Conform Specifics

  • Remix Pages/Routes: Include loader and action functions per Remix conventions.
  • Forms: Integrate the Conform form library with proper validation and submission logic.

3.4 Verification and Consistency

  • Verification: Always verify information before presenting.
  • File-by-File Edits: Present edits file by file in a single chunk.
  • Real File Links: Provide links to real files when referring to specific components.
  • No Confirmation: Do not ask for confirmation on provided context details.

4. Additional Guidelines

  • Verification: Confirm details before presenting.
  • File-by-File Edits: Present changes per file for easier error spotting.
  • No Apologies/Meta-Feedback: Avoid meta-feedback on understanding.
  • No Formatting-Only Suggestions: Do not suggest changes that involve only whitespace or formatting.
  • Single Chunk Edits: Provide all changes in one chunk per file.
  • Security & Performance:
    • Prioritize performance in every suggestion.
    • Consider security implications in all modifications.
  • Test Coverage & Error Handling:
    • Include unit tests or test suggestions when appropriate.
    • Implement robust error handling and logging.
  • Modular & Maintainable Design: Encourage modular design for maintainability.
  • Version Compatibility: Ensure compatibility with the specified language/framework versions.
  • No Inventions: Only modify code when explicitly requested.
  • Explicit Naming: Use explicit and descriptive variable names.
  • Assertions & Edge Cases: Use assertions and consider edge cases.
  • Real File Links: Always provide links to actual files rather than context-generated ones.

5. General Coding Guidelines

5.1 Code Style & Structure

  • Clean Code: Maintain clean, modular, and well-structured TypeScript code.
  • Variable Naming: Use explicit, descriptive names (e.g., isLoading, hasError).
  • Exports: Favor named exports for components.
  • Directory Naming: Use lowercase-with-dashes for directories (e.g., components/auth-wizard).

5.2 TypeScript Best Practices

  • Strict TypeScript: All code must be TypeScript (no plain JavaScript).
  • Interfaces: Prefer interfaces over types for props and data structures.
  • Functional Components: Use functional components exclusively.

5.3 UI & Styling

  • Tailwind CSS: Mandatory for styling.
  • Performance: Optimize UI code using immutable data structures, efficient rendering, and proper state management.

5.4 Performance & Security

  • Error Handling: Implement robust error handling and secure coding practices.
  • Optimization: Optimize for performance, caching, and reactivity.

6. Framework-Specific Guidelines

6.1 Remix

  • Documentation: Follow the official Remix documentation.
  • Conventions:
    • Data Fetching: Use loader functions to fetch data.
      Example:
      import type { LoaderFunction } from '@remix-run/node';
import { json } from '@remix-run/node';

export const loader: LoaderFunction = async ({ params }) => {
  const data = await fetchData(params.id);
  return json({ data });
};
    • Actions: Handle form submissions with action functions.
      Example:
      import type { ActionFunction } from '@remix-run/node';
import { json } from '@remix-run/node';

export const action: ActionFunction = async ({ request }) => {
  const formData = await request.formData();
  // process the formData...
  return json({ success: true });
};
    • Error Boundaries: Define error boundaries to catch runtime errors.
      Example:
      export function ErrorBoundary({ error }: { error: Error }) {
  console.error(error);
  return <div>Something went wrong. Please try again later.</div>;
}
    • Links and Navigation: Use <Link to="..."> from @remix-run/react.
      Example:
      import { Link } from '@remix-run/react';

export function Navigation() {
  return (
    <nav>
      <Link to="/">Home</Link>
      <Link to="/about">About</Link>
    </nav>
  );
}

6.2 Conform

  • Documentation: Follow the Conform documentation.
  • Integration:
    • Form Setup: Use useForm to manage form state and validation.
      Example:
      import { useForm } from 'conform';

export function SignupForm() {
  const [formProps, { errors }] = useForm({
    initialValues: { username: '' },
    onSubmit: async (values) => {
      // perform signup logic
    },
  });

  return (
    <form {...formProps}>
      <input name="username" placeholder="Username" />
      {errors.username && <p className="text-red-500">{errors.username}</p>}
      <button type="submit" className="btn-primary">Sign Up</button>
    </form>
  );
}
    • Validation and Error Display: Ensure that validation errors are handled and displayed as per Conform’s recommendations.
      Example:
      import { useForm } from 'conform';

export function ContactForm() {
  const [formProps, { errors }] = useForm({
    initialValues: { email: '', message: '' },
    onSubmit: async (values) => {
      // process the contact form values
    },
  });

  return (
    <form {...formProps}>
      <input type="email" name="email" placeholder="Email" />
      {errors.email && <span>{errors.email}</span>}
      <textarea name="message" placeholder="Your message"></textarea>
      {errors.message && <span>{errors.message}</span>}
      <button type="submit">Send Message</button>
    </form>
  );
}

6.3 Shadcn UI

  • Component Library: Use Shadcn UI for all UI components.
  • Reference: Consult the Shadcn UI documentation for usage details.
  • Code Examples: Extract full component code examples from the Shadcn UI docs when available.

7. Installing Additional Components

  • Shadcn CLI: Use the Shadcn CLI to install additional components:
    npx shadcn@latest add [component-name]
    • Example:
      npx shadcn@latest add accordion
  • Note: Use npx shadcn@latest (the older npx shadcn-ui@latest is deprecated).
  • Common Components: Accordion, Alert, AlertDialog, AspectRatio, Avatar, Calendar, Checkbox, Collapsible, Command, ContextMenu, DataTable, DatePicker, Dropdown Menu, Form, Hover Card, Menubar, Navigation Menu, Popover, Progress, Radio Group, ScrollArea, Select, Separator, Sheet, Skeleton, Slider, Switch, Table, Textarea, Toast, Toggle, Tooltip.

8. Converting Next.js to Remix: Detailed Guidelines

This section provides a comprehensive set of rules for migrating Next.js projects (especially those using Shadcn UI components) to a Remix-based architecture. Follow these guidelines to maintain functional parity while leveraging Remix’s conventions.

8.1 Project Structure & Routing

  • File Structure:
    • Next.js: Pages reside in /pages.
    • Remix: Use a nested /app/routes directory.
    • Conversion:
      • Convert pages/about.tsx to app/routes/about.tsx.
      • Convert dynamic routes:
        • pages/blog/[slug].tsx → app/routes/blog.$slug.tsx.
  • Asset Management:
    • Retain or adjust static assets to fit Remix conventions (typically in the /public folder).

8.2 Routing Differences

  • Link Components:
    • Next.js: <Link href="/...">
    • Remix: <Link to="/..."> (import from @remix-run/react).
  • Dynamic Routing:
    • Convert Next.js dynamic segments (e.g., [id].tsx) to Remix’s file naming conventions (e.g., $id.tsx).
  • Nested Routes:
    • Leverage Remix’s nested routes to encapsulate layouts and shared components naturally.

8.3 Data Fetching & Server-Side Logic

  • Next.js Methods vs. Remix Loaders:
    • Replace getStaticProps, getServerSideProps, and getStaticPaths with Remix loader functions.
    • Example Conversion:
      // Next.js:
export async function getStaticProps(context) {
  // data fetching logic
}

// Remix:
import type { LoaderFunction } from '@remix-run/node';
import { json } from '@remix-run/node';

export const loader: LoaderFunction = async ({ params }) => {
  return json({ data: await getData(params.id) });
};
  • Actions for Form Submissions & API Routes:
    • Replace Next.js API routes with Remix action functions in the same route file.
    • Example:
      import type { ActionFunction } from '@remix-run/node';
import { json } from '@remix-run/node';

export const action: ActionFunction = async ({ request }) => {
  const formData = await request.formData();
  // Handle POST requests or form submissions
  return json({ success: true });
};
  • Error Handling:
    • Utilize Remix error boundaries to catch and manage runtime errors from loaders and actions.

8.4 Server-Only Code & Security

  • Separation of Concerns:
    • Isolate server-only logic within Remix loaders/actions to ensure secure data handling.
  • Security Practices:
    • Leverage HTTP error responses and built-in error boundaries for robust error handling.

8.5 UI Component Adaptation

  • Shadcn UI Imports:
    • Next.js Example:
      import { Button } from '@repo/ui/components/ui/button';
    • Remix:
      • Maintain the same import paths if possible or adjust to your Remix aliasing:
        import { Button } from '<ui_package_alias>@repo/ui/components/ui/button';
  • Tailwind CSS Integration:
    • Ensure your Tailwind classes remain consistent.
    • Update the Remix configuration (e.g., via postcss.config.js and linking stylesheets in the root layout).

8.6 Testing, Verification, and Documentation

  • Incremental Conversion:
    • Migrate file by file rather than all at once. This isolates issues and simplifies testing.
  • Update Tests:
    • Adjust unit, integration, and end-to-end tests (e.g., Jest, React Testing Library, Cypress) to account for Remix’s loaders, actions, and nested routes.
  • Documentation:
    • Update code comments and documentation to reflect changes in routing, data fetching, and error handling.
    • Provide real file links and references for clarity.

8.7 Environment & Deployment

  • Configuration Files:
    • Update environment variables and configuration files (e.g., remix.config.js) to meet Remix runtime requirements.
  • Bundler & Performance:
    • Transition from Next.js bundlers (Webpack, etc.) to Remix’s build system (or Vite, if configured).
    • Leverage Remix caching strategies (HTTP headers, loader caching) for performance improvements.

Final Notes

  • Accuracy: Always verify code and documentation before finalizing changes.
  • Single-Chunk Edits: Provide all changes per file in a single update.
  • Modular Design: Encourage a modular, maintainable architecture.
  • Security & Performance: Prioritize robust error handling, secure coding practices, and performance optimizations.
  • Real File Links: When referring to components or documentation, use real file links instead of generated contexts.
  • No Inventions: Modify code only when explicitly requested, following the guidelines exactly.````

Combined from several sources and enhanched with chatgpt. Putting specific section in there for converting nextjs to remix applications.

2

I got myself a new ruleset for nextjs to remix included here: any thougshs?

Below is an even more extensive “ultimate” conversion ruleset. In this version we’ve incorporated additional code examples for every major section by comparing Next.js and Remix official documentation. This revised blueprint focuses on converting Next.js features (data fetching, layouts, routing, API routes, static assets, etc.) to their Remix equivalents while including side‑by‑side code examples. All examples are drawn and adapted from Next.js Docs and Remix Docs.

The Ultimate Next.js → Remix Conversion Blueprint (Enhanced)

This comprehensive guide covers the complete conversion process for a Next.js project (especially one using private folders for colocation) to Remix. It is organized by major features:

  1. Project Structure & File Organization
  2. Routing (Basic, Dynamic, Nested, Optional, Splat, and Advanced)
  3. Data Fetching & API Routes
  4. Global & Nested Layouts
  5. Components & Colocation (Private Folders)
  6. Styling & Asset Management
  7. Module Aliases & Configuration
  8. Advanced Topics (Optional Segments, Pathless Routes, Route Groups)
  9. Testing & Performance Considerations

Each section includes detailed code examples comparing Next.js to Remix. Use this as your definitive guide for migration.

1. Project Structure & File Organization

Next.js Structure (Example from Next.js Docs)

Next.js projects typically organize code as follows:

my-nextjs-app/
├── pages/
│   ├── index.tsx            // Root page
│   ├── about.tsx            // /about page
│   ├── blog/
│   │   ├── [slug].tsx       // Dynamic route for blog posts
│   └── api/
│       └── contact.ts       // API route
├── components/
│   └── Button.tsx
├── public/
│   └── images/
│       └── logo.png
└── styles/
    └── globals.css

Remix Structure (According to Remix Docs)

Remix projects use the app/ directory:

my-remix-app/
├── app/
│   ├── root.tsx             // Global layout (replaces _app.tsx)
│   ├── entry.client.tsx     // Client entry point
│   ├── entry.server.tsx     // Server entry point
│   ├── routes/
│   │   ├── index.tsx        // Home route "/"
│   │   ├── about.tsx        // About page "/about"
│   │   ├── blog/
│   │   │   ├── $slug.tsx    // Dynamic blog post route "/blog/:slug"
│   │   │   └── _components/ // Private folder for blog-specific components
│   │   └── api/
│   │       └── contact.ts   // API route (using loader/action)
│   ├── components/          // Shared components (if needed)
│   ├── styles/
│   │   └── global.css
│   └── lib/                 // Utilities or shared functions
├── public/
│   └── images/
│       └── logo.png
└── remix.config.js

Conversion Tip:
Map your Next.js pages/ to Remix app/routes/. Preserve private folders (underscore‑prefixed) by keeping them inside feature folders.

2. Routing Conversion

2.1 Basic Routes

Next.js Example

// pages/about.tsx (Next.js)
export default function About() {
  return <div>About Page</div>;
}

Remix Example

// app/routes/about.tsx (Remix)
export default function About() {
  return <div>About Page</div>;
}

2.2 Dynamic Routes

Next.js Example

// pages/blog/[slug].tsx (Next.js)
export default function BlogPost({ params }) {
  return <div>Post: {params.slug}</div>;
}

Remix Example

// app/routes/blog/$slug.tsx (Remix)
import type { LoaderFunction } from '@remix-run/node';
import { json } from '@remix-run/node';
import { useLoaderData } from '@remix-run/react';

export const loader: LoaderFunction = async ({ params }) => {
  const post = await fetchPost(params.slug!);
  return json({ post });
};

export default function BlogPost() {
  const { post } = useLoaderData<typeof loader>();
  return <div>Post: {post.title}</div>;
};

2.3 Nested Routes

Flat‑File Convention (Using Dot Delimiters)

Next.js may use nested folders; Remix supports both flat‑file and folder‑based routing.

// Next.js: pages/concerts/trending.tsx
// Remix (flat-file): app/routes/concerts.trending.tsx
export default function TrendingConcerts() {
  return <div>Trending Concerts</div>;
}

Folder‑Based (Colocation) Example

// Directory structure in Remix:
app/routes/concerts/
  index.tsx          // Renders at /concerts
  trending.tsx       // Renders at /concerts/trending
  $city.tsx          // Renders at /concerts/:city
  _components/       // Private folder for concert-specific components

Code for index.tsx:

// app/routes/concerts/index.tsx
export default function ConcertsHome() {
  return <div>Concerts Home</div>;
}

2.4 Optional Segments & Splat Routes

Optional Segments Example

// Remix file: app/routes/($lang).products.tsx
// Matches both "/products" and "/en/products"
export default function Products() {
  return <div>Products Page</div>;
}

Splat Route Example

// app/routes/$.tsx (Remix)
// Catch-all route for undefined paths
export default function CatchAll() {
  return <div>Page Not Found</div>;
}

Pathless Routes (Shared Layouts) Example

// Directory structure:
app/routes/
  _auth.tsx         // Pathless layout (not routable)
  _auth.signup.tsx  // Renders at /signup within _auth layout
  _auth.signin.tsx  // Renders at /signin within _auth layout

Code for _auth.tsx:

// app/routes/_auth.tsx
import { Outlet } from '@remix-run/react';
export default function AuthLayout() {
  return (
    <div>
      <header>Auth Header</header>
      <Outlet />
      <footer>Auth Footer</footer>
    </div>
  );
}

Code for _auth.signup.tsx:

// app/routes/_auth.signup.tsx
export default function Signup() {
  return <div>Sign Up Page</div>;
}

Nested Routes Without Layout Nesting

// Remix file: app/routes/concerts_.mine.tsx
// Renders /concerts/mine without inheriting the layout from app/routes/concerts.tsx
export default function MyConcerts() {
  return <div>My Concerts</div>;
}

Reference: Remix Docs – Route File Conventions

3. Data Fetching & API Routes Conversion

3.1 Converting Data Fetching Methods

Next.js Example: getStaticProps

// pages/post/[slug].tsx (Next.js)
export async function getStaticProps({ params }) {
  const post = await fetchPost(params.slug);
  return { props: { post } };
}

Remix Loader Example

// app/routes/post/$slug.tsx (Remix)
import type { LoaderFunction } from '@remix-run/node';
import { json } from '@remix-run/node';

export const loader: LoaderFunction = async ({ params }) => {
  const post = await fetchPost(params.slug!);
  return json({ post });
};

3.2 Converting API Routes

Next.js API Route Example

// pages/api/contact.ts (Next.js)
export default function handler(req, res) {
  if (req.method === 'POST') {
    // Process contact form data
    return res.status(200).json({ success: true });
  }
  res.status(405).json({ error: 'Method not allowed' });
}

Remix API Route Example (Using Action)

// app/routes/api/contact.ts (Remix)
import type { ActionFunction } from '@remix-run/node';
import { json } from '@remix-run/node';

export const action: ActionFunction = async ({ request }) => {
  if (request.method !== 'POST') {
    return json({ error: 'Method not allowed' }, { status: 405 });
  }
  // Process POST data (e.g. using await request.formData())
  return json({ success: true });
};

Reference: Next.js API Routes and Remix Loaders/Actions

4. Global & Nested Layouts

4.1 Global Layout (Replacing Next.js _app.tsx)

Next.js Example (_app.tsx)

// pages/_app.tsx (Next.js)
export default function MyApp({ Component, pageProps }) {
  return <Component {...pageProps} />;
}

Remix Example (root.tsx)

// app/root.tsx (Remix)
import { Links, LiveReload, Meta, Outlet, Scripts } from '@remix-run/react';

export default function Root() {
  return (
    <html lang="en">
      <head>
        <Meta />
        <Links />
      </head>
      <body>
        <Outlet />  {/* This renders the matched route */}
        <Scripts />
        <LiveReload />
      </body>
    </html>
  );
}

4.2 Feature‑Specific Layouts

Next.js (Custom Layout per Page)

// pages/dashboard/index.tsx (Next.js)
DashboardPage.getLayout = function getLayout(page) {
  return (
    <DashboardLayout>
      {page}
    </DashboardLayout>
  );
};
export default function DashboardPage() {
  return <div>Dashboard Content</div>;
}

Remix (Nested Route Layout)

// Directory structure for dashboard:
app/routes/dashboard/
  _layout.tsx       // Layout for all dashboard routes
  index.tsx         // Dashboard home at /dashboard
  settings.tsx      // /dashboard/settings

Code for _layout.tsx:

// app/routes/dashboard/_layout.tsx
import { Outlet } from '@remix-run/react';
export default function DashboardLayout() {
  return (
    <div>
      <header>Dashboard Header</header>
      <Outlet />
      <footer>Dashboard Footer</footer>
    </div>
  );
}

Code for index.tsx:

// app/routes/dashboard/index.tsx
export default function DashboardHome() {
  return <div>Dashboard Home Content</div>;
}

Reference: Remix Nested Routes

5. Components, Colocation & Private Folders

5.1 Colocation Strategy

In Next.js, you might use private folders (prefixed with _) for non‑routable code. In Remix, you can colocate these within the feature route folder.

Next.js Example

pages/blog/[slug].tsx
pages/blog/_components/PostPreview.tsx

Remix Example

app/routes/blog/
  $slug.tsx                // Dynamic route for blog posts
  _components/             // Private folder – not routable
    PostPreview.tsx
  _hooks/
    useFetchComments.ts
  _lib/
    formatDate.ts

5.2 Converting Shared Components

Next.js Shared Component

// components/Button.tsx (Next.js)
export default function Button({ onClick, label }) {
  return <button onClick={onClick}>{label}</button>;
}

Remix Shared Component

// app/components/Button.tsx (Remix)
import type { MouseEventHandler } from 'react';

interface ButtonProps {
  onClick: MouseEventHandler<HTMLButtonElement>;
  label: string;
}

export default function Button({ onClick, label }: ButtonProps) {
  return <button onClick={onClick}>{label}</button>;
}

Update imports accordingly across the project. See Next.js Docs on File Organization for more insights.

6. Styling & Asset Management

6.1 Global Styles

Next.js Example (import in _app.tsx)

// pages/_app.tsx (Next.js)
import '../styles/globals.css';
export default function MyApp({ Component, pageProps }) {
  return <Component {...pageProps} />;
}

Remix Example (using links() in root.tsx)

// app/root.tsx (Remix)
import type { LinksFunction } from '@remix-run/node';
import globalStylesUrl from '~/styles/global.css';

export const links: LinksFunction = () => {
  return [{ rel: 'stylesheet', href: globalStylesUrl }];
};

export default function Root() {
  return (
    <html lang="en">
      <head>
        {/* ... */}
      </head>
      <body>
        <Outlet />
        {/* ... */}
      </body>
    </html>
  );
}

6.2 Static Assets

Both frameworks use a public/ folder:

  • Next.js: Files in /public are served at the root.
  • Remix: The same applies.

Example:
Place logo.png in public/images/ and access it via /images/logo.png.

7. Module Aliases & Configuration

7.1 Updating Path Aliases

Next.js (Example tsconfig.json)

{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "@/components/*": ["components/*"]
    }
  }
}

Remix (Example tsconfig.json)

{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "@/components/*": ["app/components/*"],
      "@/routes/*": ["app/routes/*"],
      "@/lib/*": ["app/lib/*"]
    }
  }
}

Also update import statements throughout the project.

7.2 Remix Configuration

If you require custom route registration or want to use route groups, update remix.config.js as needed. For example:

/** @type {import('@remix-run/dev').AppConfig} */
module.exports = {
  // You can customize ignoredRouteFiles to prevent accidental routable files.
  ignoredRouteFiles: ["**/.*"],
  // Further custom configuration can be added here.
};

Reference: Remix Config Docs

8. Advanced Topics

8.1 Optional Segments & Dynamic Behavior

Optional Segment Example (for language)

// app/routes/($lang).index.tsx
export default function Home() {
  return <div>Welcome to the site</div>;
}

Matches both / and /en.

8.2 Pathless Routes for Shared Layouts

(As shown in section 2.4.1)

8.3 Route Groups (Organizational)

// Example: app/routes/(admin)/dashboard.tsx
// The (admin) folder is only for grouping; the URL will be "/dashboard".

8.4 Remix‑Flat‑Routes (Optional)

For very large apps, consider using the remix‑flat‑routes package to allow nested folders while maintaining a flat route namespace.

Reference: remix‑flat‑routes GitHub

9. Testing, Performance & Build Considerations

9.1 Verifying Routes and Data

  • Use Remix Dev Server: Run npm run dev and manually test all route paths.
  • Ensure Loaders and Actions: Verify that data is correctly fetched and rendered using Remix’s useLoaderData.

9.2 Performance

  • Colocation Benefits: By colocating feature-specific code, Remix can better optimize bundle sizes.
  • Caching: Use Remix caching strategies in your loaders if appropriate.

9.3 Automated Testing

  • Update your integration tests (e.g., using Testing Library) to reflect the new route paths.
  • Verify that API endpoints (actions) return the expected data.

Summary Checklist

  1. Project Structure:

    • Move pages/ → app/routes/
    • Preserve private folders (underscore‑prefixed) inside each feature.

  2. Routing:

    • Convert dynamic [slug].tsx → $slug.tsx
    • Choose between flat‑file (dot‑notation) or folder‑based nested routes
    • Implement optional segments, pathless routes, and route groups as needed

  3. Data & API:

    • Replace Next.js data fetching (getStaticProps, getServerSideProps) with Remix loader functions
    • Convert API routes (pages/api) to Remix action functions

  4. Layouts:

    • Replace _app.tsx with app/root.tsx
    • Create feature‑specific layouts in nested folders

  5. Components & Colocation:

    • Co-locate feature‑specific components, hooks, and utilities in private folders under the route folder
    • Update module aliases

  6. Styling & Assets:

    • Import global styles via Remix’s links() in root.tsx
    • Retain static assets in public/

  7. Advanced Routing:

    • Use optional segments, splat routes, pathless routes, and route groups as required
    • Consider remix‑flat‑routes for large projects

  8. Configuration & Testing:

    • Update tsconfig.json and Remix config files
    • Test all routes, loaders, and actions thoroughly

By following this enhanced, code‑rich conversion blueprint—supported by official Next.js and Remix documentation—you’ll successfully migrate your Next.js project into a well‑organized, scalable Remix application. This ruleset aims to cover every critical aspect and offers side‑by‑side code examples so you can reference the exact conversion techniques for every feature. Happy migrating!

References:

3

Obviously, folks avoiding typing a lot and use AI tools to code also don’t like to read long walls of text! :smiley:

I am currently working on a Shopify Remix app and use it as learning ground for AI coding, with mixed results so far.

Definitely have to use .mdc files and notebooks more, we’ll see how far this goes.

How was your success with the migration?