Table of Contents

• Process

  • Process Events

    • Event: 'beforeExit'
    • Event: 'disconnect'
    • Event: 'exit'
    • Event: 'message'
    • Event: 'multipleResolves'
    • Event: 'rejectionHandled'

    • Event: 'uncaughtException'

      • Warning: Using 'uncaughtException' correctly
    • Event: 'unhandledRejection'

    • Event: 'warning'

      • Emitting custom warnings
    • Signal Events
  • process.abort()
  • process.allowedNodeEnvironmentFlags
  • process.arch
  • process.argv
  • process.argv0
  • process.channel
  • process.chdir(directory)
  • process.config
  • process.connected
  • process.cpuUsage([previousValue])
  • process.cwd()
  • process.debugPort
  • process.disconnect()
  • process.dlopen(module, filename[, flags])
  • process.emitWarning(warning[, options])

  • process.emitWarning(warning[, type[, code]][, ctor])

    • Avoiding duplicate warnings
  • process.env
  • process.execArgv
  • process.execPath
  • process.exit([code])
  • process.exitCode
  • process.getegid()
  • process.geteuid()
  • process.getgid()
  • process.getgroups()
  • process.getuid()
  • process.hasUncaughtExceptionCaptureCallback()
  • process.hrtime([time])
  • process.hrtime.bigint()
  • process.initgroups(user, extraGroup)
  • process.kill(pid[, signal])
  • process.mainModule
  • process.memoryUsage()
  • process.nextTick(callback[, ...args])
  • process.noDeprecation
  • process.pid
  • process.platform
  • process.ppid
  • process.release
  • process.send(message[, sendHandle[, options]][, callback])
  • process.setegid(id)
  • process.seteuid(id)
  • process.setgid(id)
  • process.setgroups(groups)
  • process.setuid(id)
  • process.setUncaughtExceptionCaptureCallback(fn)
  • process.stderr
  • process.stdin

  • process.stdout

    • A note on process I/O
  • process.throwDeprecation
  • process.title
  • process.traceDeprecation
  • process.umask([mask])
  • process.uptime()
  • process.version
  • process.versions
  • Exit Codes

Process#

The process object is a global that provides information about, and control over, the current Node.js process. As a global, it is always available to Node.js applications without using require().

Process Events#

The process object is an instance of EventEmitter.

Event: 'beforeExit'#

The 'beforeExit' event is emitted when Node.js empties its event loop and has no additional work to schedule. Normally, the Node.js process will exit when there is no work scheduled, but a listener registered on the 'beforeExit' event can make asynchronous calls, and thereby cause the Node.js process to continue.

The listener callback function is invoked with the value of process.exitCode passed as the only argument.

The 'beforeExit' event is not emitted for conditions causing explicit termination, such as calling process.exit() or uncaught exceptions.

The