process

globalThis.process, node:process, process y elide:process hacen referencia al mismo objeto.

Están disponibles las propiedades habituales de Node, incluidas argv, execArgv, env, arch, platform, pid, ppid, version, versions, execPath, title, cwd(), umask(), exitCode y exit().

console.log(process.platform, process.arch);
console.log(process.cwd());

if (process.env.CI) process.exitCode = 1;

Eventos y planificación

process es un EventEmitter. Admite los métodos estándar de listeners y eventos del runtime como warning, beforeExit, exit y uncaughtException.

process.nextTick(callback, ...args) se ejecuta antes que las funciones de retorno de Promise y de queueMicrotask en el siguiente punto de control:

const order = [];
process.nextTick(() => order.push("tick"));
Promise.resolve().then(() => order.push("promise"));
queueMicrotask(() => order.push("microtask"));
setImmediate(() => console.log(order));
// ["tick", "promise", "microtask"]

Flujos estándar

stdin, stdout y stderr son flujos de Node. stdout y stderr exponen su descriptor de archivo mediante fd; los flujos de terminal también exponen campos TTY. La salida de la consola se encamina por estos flujos, así que sustituir process.stdout.write intercepta la salida de console.log.

Entorno

process.env expone el entorno visible como un objeto mutable. Consulte Variables de entorno para conocer la carga, la modificación y el comportamiento con subprocesos.

Métricas parciales

hrtime(), cpuUsage(), memoryUsage() y uptime() se pueden invocar. cpuUsage() y memoryUsage() devuelven objetos vacíos, así que no dependa de los campos de métricas detalladas de Node. process.send y process.disconnect están disponibles en un hijo iniciado con child_process.fork().

Reference

Status: Partial · 77 of 87 suite tests pass (88.5%) · since 1.1.0

Exports

Export	Kind	Status	Notes
`process.arch`	property	Full	CPU architecture of the process (e.g. “x64”, “arm64”)
`process.argv`	property	Full	Command-line arguments passed to the process, starting with the node executable path
`process.argv0`	property	Full	The original value of argv[0] before any modification by Node.js
`process.env`	property	Full	Object containing the process environment variables
`process.execArgv`	property	Full	Node.js-specific flags passed to the node executable
`process.execPath`	property	Full	Absolute path of the node executable
`process.pid`	property	Full	Process ID
`process.ppid`	property	Full	Parent process ID
`process.platform`	property	Full	Operating system platform (e.g. “linux”, “darwin”, “win32”)
`process.title`	property	Full	Displayed process title (settable in most environments)
`process.version`	property	Full	Node.js version string (e.g. “v20.0.0”)
`process.versions`	property	Full	Object mapping dependency names to their version strings
`process.abort()`	function	Full	Terminates the process immediately with a core dump (SIGABRT)
`process.cwd()`	function	Full	Returns the current working directory of the process
`process.chdir()`	function	Full	Changes the current working directory of the process
`process.exit()`	function	Full	Terminates the process with the given exit code
`process.getuid()`	function	Full	Returns the numeric user ID of the process owner
`process.getgid()`	function	Full	Returns the numeric group ID of the process owner
`process.geteuid()`	function	Full	Returns the effective numeric user ID
`process.getegid()`	function	Full	Returns the effective numeric group ID
`process.hrtime()`	function	Full	Returns the current high-resolution time as [seconds, nanoseconds]
`process.umask()`	function	Full	Gets or sets the file creation mode mask
`process.cpuUsage()`	function	Full	Returns the CPU time used since an optional reference point
`process.memoryUsage()`	function	Full	Returns a snapshot of the current process memory usage
`process.uptime()`	function	Full	Returns the number of seconds the current process has been running
`process.nextTick()`	function	Full	Schedules a callback to run after I/O events but before timers in the current event loop tick
`process.stdin`	property	Full	Readable stream connected to stdin
`process.stdout`	property	Full	Writable stream connected to stdout
`process.stderr`	property	Full	Writable stream connected to stderr

Not implemented

addUncaughtExceptionCaptureCallback, debugPort, finalization, getBuiltinModule, report, resourceUsage, sourceMapsEnabled.

Tests: node-api node:process: 77 pass, 10 fail, 0 error, 6 skipped. Failing: test-process-dlopen-error-message-crash.js, test-process-env-allowed-flags-are-documented.js, test-process-env-allowed-flags.js, test-process-exec-argv.js, test-process-execve-permission-fail.js, test-process-exit-code-validation.js, test-process-load-env-file.js, test-process-remove-all-signal-listeners.js, and 2 more.