Note for CI/builders (e.g., Vercel, GitHub Actions): since this package is public on npm, no extra auth or .npmrc is required. Just run your normal install command.

Note: The library supports React 18.0.0 and above. For best compatibility, use React 18.2.0 or later.

Quickstart: Next.js 15 + Tailwind v4

Follow these steps to integrate the design system in a brand-new Next.js app.

Create a Next.js app (TypeScript recommended):

npx create-next-app@latest my-app
cd my-app

Add Tailwind v4 PostCSS plugin (required for Tailwind v4):

npm install -D @tailwindcss/postcss

Create postcss.config.mjs (if you don't have one):

/** @type {import('postcss-load-config').Config} */
const config = {
  plugins: {
    '@tailwindcss/postcss': {},
  },
}
export default config

Install the design system:

npm install @codapet/design-system

Configure global CSS for Tailwind v4 scanning and import the design system styles.

Edit app/globals.css:

@import "tailwindcss";

/* Tell Tailwind where to scan for class usage */
@source "../**/*.{js,ts,jsx,tsx,mdx}";
@source "../../node_modules/@codapet/design-system/dist/**/*.{js,mjs,ts,tsx}";

/* Import the design system tokens and base styles (after Tailwind) */
@import "@codapet/design-system/styles";

Ensure your Next.js root layout includes the globals:

// app/layout.tsx
import type { Metadata } from 'next'
import './globals.css'

export const metadata: Metadata = { title: 'My App' }

export default function RootLayout({ children }: { children: React.ReactNode }) {
  return (
    <html lang="en">
      <body>{children}</body>
    </html>
  )
}

Use components:

// app/page.tsx
import { Button, Card, CardContent, CardHeader, CardTitle } from '@codapet/design-system'

export default function Page() {
  return (
    <main className="p-8">
      <Card>
        <CardHeader>
          <CardTitle>Hello</CardTitle>
        </CardHeader>
        <CardContent>
          <Button>Works!</Button>
        </CardContent>
      </Card>
    </main>
  )
}

Run the app:

npm run dev

Tailwind v3 (legacy)

If you are on Tailwind v3, use a config-based content scan instead of @source (see below in Styling).

Usage

Basic Setup

import { Button, Card, Input } from '@codapet/design-system'

function App() {
  return (
    <div>
      <Card>
        <Input placeholder="Enter your name" />
        <Button>Click me</Button>
      </Card>
    </div>
  )
}

Available Components

The library exports all UI components from the components/ui directory:

import {
  Accordion,
  Alert,
  AlertDialog,
  AspectRatio,
  Avatar,
  Badge,
  Breadcrumb,
  Button,
  Calendar,
  Card,
  Carousel,
  Chart,
  Checkbox,
  Collapsible,
  Command,
  ContextMenu,
  Dialog,
  Drawer,
  DropdownMenu,
  Form,
  HoverCard,
  Input,
  InputOTP,
  Label,
  Menubar,
  NavigationMenu,
  Pagination,
  Popover,
  Progress,
  RadioGroup,
  Resizable,
  ScrollArea,
  Select,
  Separator,
  Sheet,
  Sidebar,
  Skeleton,
  Slider,
  Sonner,
  Switch,
  Table,
  Tabs,
  Textarea,
  Toggle,
  ToggleGroup,
  Tooltip,
} from '@codapet/design-system'

Utilities

import { cn } from '@codapet/design-system'

// Utility function for merging class names
const className = cn('base-class', 'conditional-class')

Hooks

import { useIsMobile } from '@codapet/design-system'

function MyComponent() {
  const isMobile = useIsMobile()
  // ...
}

Development

Prerequisites

Node.js 18+
npm or yarn

Setup

Clone the repository
Install dependencies:
```
npm install
```

Development Commands

npm run dev - Start the development server
npm run build:lib - Build the library for distribution
npm run build:all - Build both the library and the demo app
npm run lint - Run ESLint
npm run test:lib - Test the library build
npm run check:deps - Check dependency tree
npm run clean:deps - Clean and reinstall dependencies

Building for Distribution

To build the library as an npm package:

npm run build:lib

This will generate:

dist/index.mjs - ES Module bundle
dist/index.d.mts - TypeScript declarations

Publishing

Releases are automated via GitHub Actions on semver tags.

Setup once:

In GitHub → Settings → Secrets and variables → Actions, add NPM_TOKEN with publish access to the @codapet org.

Release steps:

# update version in package.json
git commit -am "chore(release): v1.2.3"
git tag v1.2.3
git push --follow-tags

The workflow builds, tests, and runs npm publish --access public.

Styling

The design system uses Tailwind CSS for styling. Make sure to include Tailwind CSS in your project and configure Tailwind to scan this package so utilities used inside it are generated.

Tailwind v4 (recommended)

In your global CSS (e.g. app/globals.css), add @source to include the design system and import its stylesheet after Tailwind:

@import "tailwindcss";

/* Tell Tailwind to scan the design system in node_modules */
@source "../**/*.{js,ts,jsx,tsx,mdx}";
@source "../../node_modules/@codapet/design-system/dist/**/*.{js,mjs,ts,tsx}";

/* Import the design system CSS tokens and base layers */
@import "@codapet/design-system/styles";

Ensure your layout imports your globals (Next.js):

// app/layout.tsx
import "./globals.css";

Tailwind v3

If you are still on Tailwind v3, use the content globs instead of @source:

// tailwind.config.js
/** @type {import('tailwindcss').Config} */
module.exports = {
  content: [
    './app/**/*.{js,ts,jsx,tsx}',
    './components/**/*.{js,ts,jsx,tsx}',
    './node_modules/@codapet/design-system/dist/**/*.{js,mjs,ts,tsx}',
  ],
  theme: { extend: {} },
  plugins: [],
}

Troubleshooting

Components render unstyled:
- Ensure your globals.css contains @source that points to the design system in node_modules (Tailwind must see class usage to emit utilities).
- Restart the dev server after changing @source or Tailwind config.
- Verify @import "@codapet/design-system/styles"; comes after @import "tailwindcss";.
- If you use Tailwind v3, configure content globs as shown above.
PostCSS cannot resolve an import:
- Ensure @tailwindcss/postcss is installed and present in postcss.config.*.
- If you see an error resolving tw-animate-css, install it in the app: npm i -D tw-animate-css.
Still stuck? Clear caches and rebuild: rm -rf .next then npm run dev.

Dependency Management

For detailed information about how dependencies are organized and managed, see DEPENDENCIES.md.

Key Points:

Peer Dependencies: React and React DOM (provided by consuming app)
Dependencies: UI libraries and utilities (bundled with library)
Dev Dependencies: Build tools and development utilities (not included in package)

Contributing

Fork the repository
Create a feature branch
Make your changes
Add tests if applicable
Submit a pull request

License

MIT License - see LICENSE file for details.

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Package last updated on 05 Sep 2025

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Install

@codapet/design-system