bitcoinjs-lib addresses and network selection

addr.js

var bitcoin = require('bitcoinjs-lib')
var net = function(network) {
	tmp = (network == 'testnet') ? bitcoin.networks.testnet : bitcoin.networks.bitcoin;
	return tmp;
};
network = 'bitcoin'
var key = bitcoin.ECPair.makeRandom({network: net(network)});
var bitcoinAddress = key.getAddress(net(network)).toString();
var privateKeyWif = key.toWIF();

console.log('address',bitcoinAddress);
console.log('wif',privateKeyWif);