nodejs on exit event

The "exit" event in Node.js is emitted when the process is about to exit. It can be used to perform cleanup operations or any other necessary tasks before the process terminates.

Here are the steps to use the "exit" event in Node.js:

1. First, you need to import the "process" module in your Node.js application by using the following line of code:

const process = require('process');

1. Then, you can attach a listener to the "exit" event using the "on" method of the "process" object. You can define a function that will be executed when the event is emitted. Here's an example:

process.on('exit', (code) => {
  console.log('Exiting with code:', code);
  // Perform cleanup operations or any other necessary tasks here
});

1. Inside the listener function, you can perform any cleanup operations or other tasks that you need to execute before the process exits. In the example above, we simply log the exit code to the console.

Note that the listener function will be executed synchronously, so it's important to avoid blocking operations inside it.

That's it! Now, whenever the process is about to exit, the listener function will be called, allowing you to perform any necessary actions.

I hope this explanation helps! Let me know if you have any further questions.