child2.js

// Change from CommonJS require to ES module import *******************************
import io from 'socket.io-client';
const    resetColor = '\x1b[0m';
const    redColor = '\x1b[31m';
const    greenColor = '\x1b[32m';
const    yellowColor = '\x1b[33m';
const    blueColor = '\x1b[34m';
// Connect to the parent server ***************************************************
const socket = io('http://localhost:3000');
// Listen for messages from the parent ********************************************
socket.on('messageFromParent', (message) => {
    if (message.message === 'Hello from Child 1!') {
        socket.emit('messageFromChild', {
            from: 'Child 2',
            message: 'Hello from Child 2!',
            type: 'hello'
        });
    }
    if (message.message === 'Exit request to Child 2') {
        socket.emit('messageFromChild', {
            from: 'Child 2',
            message: 'Exit request to Child 1',
            type: 'request'
        });
        socket.emit('exit');
        //console.log('Child 2 : exit event emitted')
        setTimeout(() => {
            socket.disconnect();
            process.exit(0)
            return;
        }, 1000);
    }
});
socket.on('exit', () => {
    socket.emit('messageFromChild', {
        type: 'exit',
        from: 'Child 2',
        message: 'Exit event received from child 2'
    });
});