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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

Parse command-line arguments Listen for CTRL+C Spawn a child process and communicate using IPC Get the process uptime in nanoseconds Listen to OS signals Read stderr from a child process Read stdout from a child process Spawn a child process Read from stdin

File SystemProcess

Listen to OS signals

Bun supports the Node.js process global, including the process.on() method for listening to OS signals.

Get the process uptime in nanoseconds

Use Bun.nanoseconds() to get the total number of nanoseconds the bun process has been alive.

Read stderr from a child process

When you spawn a child process with Bun.spawn() , it inherits the stderr of the spawning process. To read and handle stderr instead, set the stderr option to