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

DNS

Use Bun's DNS module to resolve DNS records

File System Router

Bun provides a fast API for resolving routes against file-system paths

Fetch

Send HTTP requests with Bun's fetch API

On this page

DNS caching in Bun When should I prefetch a DNS entry?dns.prefetch dns.getCacheStats()Configuring DNS cache TTL Why is 30 seconds the default?