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

DNS Fetch TCP UDP

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

Standards & CompatibilityNetworking

UDP

Use Bun's UDP API to implement services with advanced real-time requirements, such as voice chat.

TCP

Use Bun's native TCP API to implement performance-sensitive systems like database clients, game servers, or anything that needs to communicate over TCP (instead of HTTP)

Server

Use `Bun.serve` to start a high-performance HTTP server in Bun

On this page

Bind a UDP socket (Bun.udpSocket())Send a datagram Receive datagrams Connections Send many packets at once using sendMany()Handle backpressure Socket options Multicast