# React + Next.js Setup (v3)

Legacy Tailwind CSS v3 guide for React and Next.js

# Frontfriend v3 Integration Guide for React + Next.js

This legacy guide walks you through integrating Frontfriend v3 with a React or Next.js project that uses Tailwind CSS v3. For new Tailwind CSS v4 projects, use the [Frontfriend v4 Getting Started guide](/docs/legacy/index/).

## Prerequisites

- React project (Next.js, Vite, or Create React App)
- Node.js >= 16
- Tailwind CSS v3 installed (or will be installed)

## Installation

### Step 1: Install Dependencies

```bash
# Install Frontfriend Tailwind plugin
npm install @frontfriend/tailwind@3

# Install Tailwind CSS v3 if not already installed
npm install -D tailwindcss@3 postcss autoprefixer
npx tailwindcss init -p
```

### Step 2: Create Configuration

Create `frontfriend.config.js` in your project root:

```js
module.exports = {
  'ff-id': 'your-frontfriend-id-here',  // Replace with your actual FF ID
  'aliases': {
    'ui': '@/components/ui'  // Where components will be downloaded
  }
}
```

### Step 3: Configure Tailwind

Update `tailwind.config.js`:

```js
/** @type {import('tailwindcss').Config} */
module.exports = {
  content: [
    './src/**/*.{js,ts,jsx,tsx,mdx}',
    './app/**/*.{js,ts,jsx,tsx,mdx}',
    './pages/**/*.{js,ts,jsx,tsx,mdx}',
    './components/**/*.{js,ts,jsx,tsx,mdx}',
  ],
  plugins: [
    require('@frontfriend/tailwind')()
  ],
}
```

### Step 4: Import Tailwind CSS

For Next.js, in `app/globals.css` or `styles/globals.css`:

```css
@tailwind base;
@tailwind components;
@tailwind utilities;
```

### Step 5: Configure Next.js

For Next.js projects, you need to wrap your config with `frontfriend`:

Update `next.config.js`:

```js
const frontfriend = require('@frontfriend/tailwind/next')

/** @type {import('next').NextConfig} */
const nextConfig = {
  // Your existing config...
}

module.exports = frontfriend(nextConfig)
```

The `frontfriend` wrapper ensures proper integration with Frontfriend's build process and hot reloading.

For TypeScript projects, also update `tsconfig.json` or `jsconfig.json`:

```json
{
  "compilerOptions": {
    "paths": {
      "@/*": ["./src/*"]
    }
  }
}
```

### Step 6: Initialize Design Tokens

```bash
# Fetch your design tokens from Frontfriend
npx frontfriend init
```

This creates a local cache of your design system tokens.

### Step 7: Download React Components

```bash
# Download all available React components
npx frontfriend download all -f react

# Or download specific components
npx frontfriend download button card accordion -f react
```

Components will be downloaded to `src/components/ui/` (as configured in your aliases).

## Using Design Tokens

After initialization, use your design tokens as Tailwind utilities:

```jsx
export default function Example() {
  return (
    <div className="bg-brand-low text-brand-strong p-4">
      <h1 className="text-2xl font-bold mb-4">Design System Connected</h1>
      <p className="text-neutral-mid">
        Your Frontfriend tokens are now available as Tailwind utilities.
      </p>
    </div>
  );
}
```

## Using Components

```jsx
import { Button } from '@/components/ui/button';
import { Card } from '@/components/ui/card';

export default function Example() {
  return (
    <Card className="p-6">
      <h2 className="text-xl font-semibold mb-4">Welcome</h2>
      <Button variant="primary">Get Started</Button>
    </Card>
  );
}
```

## CLI Commands

- `npx frontfriend init` - Initialize/update design tokens
- `npx frontfriend init --force` - Force refresh tokens
- `npx frontfriend status` - Check configuration status
- `npx frontfriend download <components> -f react` - Download components
- `npx frontfriend clean` - Clear token cache

## Troubleshooting

### Styles not applying
1. Check that `npx frontfriend init` completed successfully
2. Verify cache exists: `npx frontfriend status`
3. Force refresh: `npx frontfriend init --force`
4. Restart your development server

### Components in wrong location
1. Check your `frontfriend.config.js` has correct `ui` alias
2. Use `-o` flag to override: `npx frontfriend download button -f react -o ./components`

### ff-id not found
1. Ensure `frontfriend.config.js` exists in project root
2. Verify the `ff-id` field is present and correct

### TypeScript errors
1. Ensure your tsconfig.json has the correct path aliases
2. Restart your TypeScript server in your IDE