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 illustrate the use of the Process disconnect event property in Node.js:
Example 1:
Filename: parent.js
Javascript
// Require fork method from child_process // to spawn child process const fork = require('child_process').fork; // Child process file const child_file = 'child.js'; // Spawn child process const child = fork(child_file); |
Filename: child.js
Javascript
console.log('In child.js') if (process.connected) { console.log("Child Process connected!") console.log("Disconnecting in 3000ms") setTimeout(() => { process.disconnect(); }, 3000); } process.on('disconnect', () => { console.log("Child Process disconnected!") }); |
Output:
In child.js Child Process connected! Disconnecting in 3000ms Child Process disconnected!
Example 2:
Filename: parent.js
Javascript
// Require fork method from child_process // to spawn child process const fork = require('child_process').fork; // Child process file const child_file = 'child2.js'; // Spawn child process const child = fork(child_file); |
Filename: child2.js
Javascript
console.log("In Child Process!") process.disconnect() process.on('disconnect', () => { console.log(`Child process disconnected`); }); |
Output:
In Child Process! Child process disconnected
Reference: https://nodejs.org/api/process.html#event-disconnect
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