# Build a React app with Bun (/docs/guides/ecosystem/react)

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Related: [Build an app with Astro and Bun](/docs/guides/ecosystem/astro.md), [Create a Discord bot](/docs/guides/ecosystem/discordjs.md), [Containerize a Bun application with Docker](/docs/guides/ecosystem/docker.md), [Use Drizzle ORM with Bun](/docs/guides/ecosystem/drizzle.md), [Use Gel with Bun](/docs/guides/ecosystem/gel.md), [Build an HTTP server using Elysia and Bun](/docs/guides/ecosystem/elysia.md)

Bun has built-in support for `.jsx` and `.tsx` files. React works with Bun.

Create a new React app with `bun init --react`. This gives you a template with a React app and an API server together in one full-stack app.

```bash terminal icon="terminal"
# Create a new React app
bun init --react

# Run the app in development mode
bun dev

# Build as a static site for production
bun run build

# Run the server in production
bun start
```

***

### Hot Reloading [#hot-reloading]

Run `bun dev` to start the app in development mode. This starts the API server and the React app with hot reloading.

### Full-Stack App [#full-stack-app]

Run `bun start` to start the API server and frontend together in one process.

### Static Site [#static-site]

Run `bun run build` to build the app as a static site. This creates a `dist` directory with the built app and its assets.

```txt File Tree icon="folder-tree"
├── src/
│   ├── index.ts        # Server entry point with API routes
│   ├── frontend.tsx    # React app entry point with HMR
│   ├── App.tsx         # Main React component
│   ├── APITester.tsx   # Component for testing API endpoints
│   ├── index.html      # HTML template
│   ├── index.css       # Styles
│   └── *.svg           # Static assets
├── package.json        # Dependencies and scripts
├── tsconfig.json       # TypeScript configuration
├── bunfig.toml         # Bun configuration
└── bun.lock            # Lock file
```