How to use the mdns.Browser function in mdns

const findDevices = () => {
    /* Look for mDNS Cast devices on local network */
    let browser = mdns.createBrowser(mdns.tcp('googlecast'))

    /* Only scan IPv4 addresses */
    mdns.Browser.defaultResolverSequence[1] =
      'DNSServiceGetAddrInfo' in mdns.dns_sd
        ? mdns.rst.DNSServiceGetAddrInfo()
        : mdns.rst.getaddrinfo({ families: [4] })

    browser.on('serviceUp', service => {
      // service.name: Chromecast-hexadecimalid
      let _id = service.name.split('-'),
        id = _id.pop()

      // fix for groups with IDs that resemble Google-Cast-Group-{deviceId}-1
      while (_id.length > 0 && id.length < 3) id = _id.pop()

      /* If device is registered, append local statistics */
      if (func.isRegistered(id)) {
        func.update(id, {
          name: service.txtRecord.fn,

var mdns = require('mdns'),
	browser  = mdns.createBrowser(mdns.tcp('ipp'));
	
mdns.Browser.defaultResolverSequence[1] = 'DNSServiceGetAddrInfo' in mdns.dns_sd ? mdns.rst.DNSServiceGetAddrInfo() : mdns.rst.getaddrinfo({families:[4]}); 

browser.on('serviceUp', function (rec) {
	console.log(rec.name, 'http://'+rec.host+':'+rec.port+'/'+rec.txtRecord.rp);
});
browser.start();

//example output...
//HP LaserJet 400 M401dn (972E51) http://CP01.local:631/ipp/printer
//HP LaserJet Professional P1102w http://P1102W.local:631/printers/Laserjet
//Officejet Pro 8500 A910 [611B21] http://HPPRINTER.local:631/ipp/printer

var Client = require('castv2-client').Client;
var DefaultMediaReceiver = require('castv2-client').DefaultMediaReceiver;
var dotenv = require('dotenv');
var mdns = require('mdns');
var ngrok = require('ngrok');
var util = require('util');

var activeDevice = null;
dotenv.load();
mdns.Browser.defaultResolverSequence[1] = 'DNSServiceGetAddrInfo' in mdns.dns_sd
	? mdns.rst.DNSServiceGetAddrInfo()
	: mdns.rst.getaddrinfo({families:[4]});

function onDeviceUp(host, item, port) {
	var media = {};
	var client = new Client();

	client.connect(host, function() {
		client.launch(DefaultMediaReceiver, function(err, player) {
			ngrok.connect({
				proto: 'http',
				addr: port,
				host_header: 'rewrite ' + port,
				bind_tls: true
			}, function (err, url) {
				media = {