Get Started

Welcome to Bun Installation Quickstart TypeScript TypeScript 6 and 7

Watch Mode Debugging REPL bunfig.toml File Types Module Resolution JSX Auto-install Plugins File System Router

Cookies File I/O Streams Binary Data Archive SQL SQLite S3 Redis Workers Environment Variables Shell Spawn WebView Cron Node-API FFI C Compiler Transpiler CSRF Protection Secrets Console TOML YAML Markdown JSON5 JSONL HTMLRewriter Image Hashing Glob Semver Color Utils Globals Bun APIs Web APIs Node.js Compatibility

Common HTTP server usage Write a simple HTTP server Send an HTTP request using fetch Hot reload an HTTP server Start a cluster of HTTP servers Configure TLS on an HTTP server Proxy HTTP requests using fetch()Stream a file as an HTTP Response Upload files via HTTP using FormData fetch with unix domain sockets in Bun Streaming HTTP Server with Async Iterators Server-Sent Events (SSE) with Bun Streaming HTTP Server with Node.js Streams

File SystemHTTP & Networking

Send an HTTP request using fetch

Bun implements the Web-standard fetch API for sending HTTP requests. To send a GET request to a URL:

Write a simple HTTP server

This code starts an HTTP server listening on port 3000 . It responds to every request with a 200 status and the body "Welcome to Bun!" .

Hot reload an HTTP server

The --hot flag runs a file with hot reloading enabled. When any module or file changes, Bun re-runs the file.