Node.js Process exit Event

Last Updated : 30 Jul, 2021

The process is the global object in Node.js that keeps track of and contains all the information of the particular node.js process that is executing at a particular time on the machine.

The process.exit() method is the method that is used to end the Node.js process. Every process action on the machine or a program is an event. For every event, there is even a handler associated with the particular event that executes when we fire the particular event. To assign an event handler to the event we use the object.on() method in the node.js. In this article, we will discuss process exit event in Node.js

Syntax:

process.on("exit", callbackfunction)

Parameters: This method takes the following two parameters.

exit: It is the name of the emit event in the process.
callbackfunction: It is the event handler of the event.

Return Type: The return type of this method is void.

Example 1:

index.js

console.log("Starting of the process")  // Binding the event to the eventhandler process.on('exit',() => {     console.log("process.exit() method is fired") })  console.log("Ending of the process")  // Exiting the process process.exit()

Run index.js file using below command:

node index.js

Output:

Starting of the process  Ending of the process  process.exit() method is fired

Example 2: Creating process exit event handler inside the user-defined event handler.

index.js

// Importing events object const events = require("events")  console.log("Starting of the process") const eventEmitter = new events.EventEmitter()  // Initializing ing event Handler var Handler = function() {     // Event handler of exit event    process.on('exit', () => {       console.log("process.exit() method is fired")    }) }  // Bind the  user defined event  eventEmitter.on("hello",Handler)  // Emit the event eventEmitter.emit("hello")  console.log("Ending of the process")  // Exiting the process process.exit()

Run index.js file using below command:

node index.js

Output:

Starting of the process  Ending of the process  process.exit() method is fired

Reference:https://nodejs.org/api/process.html#process_event_exit

Node.js Process Signal Events

zack_aayush

Improve

Article Tags :

Similar Reads

Node.js Process beforeExit Event

The 'beforeExit' is an event of class Process within the process module which is emitted when Node.js empties its event loop and has no additional work to schedule. Syntax: Event: 'beforeExit'Parameters: This event does not accept any argument as the parameter. Return Value: This event returns nothi

2 min read

Node.js Process Signal Events

Signals are a POSIX (The Portable Operating System Interface) intercommunication system. These events will be emitted when Node receives signal events. In order to notify that an event has occurred, a notification is sent. The signal handler will receive the signal's name and the signal name is uppe

3 min read

Node.js Process message Event

The 'message' is an event of class Process within the process module which is emitted whenever a message sent by a parent process using childprocess.send() is received by the child process. Syntax: Event: 'message'Parameters: This event does not accept any argument as a parameter. Return Value: This

2 min read

Node.js Process warning Event

The 'warning' is an event of class Process within the process module which is emitted whenever Node.js emits a process warning. Syntax: Event: 'warning'Parameters: This event does not accept any argument as a parameter. Return Value: This event returns nothing but a callback function for further ope

2 min read

Node.js process.exit() Method

The process.exit() method is used to end the process which is running at the same time with an exit code in NodeJS. Syntax: process.exit( code ) Parameter: Â This function accepts single parameter as mentioned above and described below: Code: It can be either 0 or 1. 0 means end the process without a

2 min read

Node.js Process disconnect Event

In this article, we will discuss about the disconnect event of the Process object. The disconnect event will be issued when the IPC channel is closed if the Node.js process was started using an IPC channel. Syntax: process.on('disconnect', () => { // Disconnect event }); The below examples illust

2 min read

How to Exit Process in Node.js ?

In this article, we will see how to exit in NodeJS application. There are different types of methods to exit in Nodejs application, here we have discussed the following four methods. Table of Content Using ctrl+C keyUsing process.exit() FunctionUsing process.exitCode variableUsing process.on() Funct

3 min read

Node.js process.geteuid() Method

The process.geteuid() method is an inbuilt application programming interface of the process module which is used to get the numerical effective user identity of the Node.js process. Syntax: process.geteuid() Parameters: This method does not accept any parameters. Return Value: This method returns an

2 min read

Node.js process.getegid() Method

The process.getegid() method is an inbuilt application programming interface of the process module which is used to get the numerical effective group identity of the Node.js process. Syntax: process.getegid() Parameters: This method does not accept any parameters. Return Value: It returns an object

2 min read

Node.js process.getgid() Method

The process.getgid() method is an inbuilt application programming interface of the process module which is used to get the numerical group identity of the Node.js process. Syntax: process.getgid() Parameters: This method does not accept any parameters. Return Value: It returns an object specifying t

1 min read