Node.js socket.unref() Method

// Node.js program to demonstrate the
// server.unref() property

// Importing dgram module
var dgram = require('dgram');

// Creating and initializing client
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");

// Handling the message event
server.on("message", function (msg) {

    // Displaying the client message
    process.stdout.write("UDP String: " 
                    + msg + "\n");

    // Exiting process
    process.exit();

})// Binding server with port
    .bind(1234, () => {

        // Getting the reference of the server
        // by using unref() method
        const size = server.unref();

        // Display the result
        console.log(size.eventNames());
    });

// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");

// Node.js program to demonstrate the
// server.unref() method

// Importing dgram module
var dgram = require('dgram');

// Creating and initializing client
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");

// Handling the message event
server.on("message", function (msg) {

    // Displaying the client message  
    process.stdout.write("UDP String: "
            + msg + "\n");

    // Exiting process 
    process.exit();
});

// Handling the listening event
server.on('listening', () => {

    // Getting address information
    // for the server
    const address = server.address();

    // Display the result
    console.log(`server listening 
        ${address.address}:${address.port}`);
});

// Binding server with port address
// by using bind() method
server.bind(1234, () => {

    // Getting the reference of server
    // by using unref() methods
    const size = server.unref();

    // Display the result
    console.log(size.eventNames());
});

// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");