Fullstack dev server Hot reloading HTML & static sites Standalone HTML CSS Loaders Single-file executable Plugins Macros Bytecode Caching Minifier esbuild

Fullstack dev server

Build fullstack applications with Bun's integrated dev server that bundles frontend assets and handles API routes

Hot reloading

Hot Module Replacement (HMR) for Bun's development server

On this page

HTML Routes HTML Imports as Routes HTML Processing Example React Integration Development Mode Development Mode Features Advanced Development Configuration Development vs Production Production Mode Ahead of Time Bundling (Recommended)Runtime Bundling API Routes HTTP Method Handlers Dynamic Routes Request Handling Plugins TailwindCSS Plugin Custom Plugins Inline Environment Variables How It Works Processing Pipeline Complete Example Best Practices Project Structure Environment-Based Configuration Error Handling API Response Helpers Type Safety Deployment Production Build Docker Deployment Environment Variables Migration from Other Frameworks From Express + Webpack From Next.js API Routes Limitations and Future Plans Current Limitations Planned Features