Script to print current network interfaces and their ip addressess

get-ips.js

'use strict';

var os = require('os');
var ifaces = os.networkInterfaces();

module.exports = () => {
  const result = [];

  Object.keys(ifaces).forEach(function (ifname) {
    var alias = 0;
  
    ifaces[ifname].forEach(function (iface) {
      if ('IPv4' !== iface.family || iface.internal !== false) {
        // skip over internal (i.e. 127.0.0.1) and non-ipv4 addresses
        return;
      }
  
      if (alias >= 1) {
        // this single interface has multiple ipv4 addresses
        result.push(iface.address);
      } else {
        // this interface has only one ipv4 adress
        result.push(iface.address);
      }
      ++alias;
    });
  });

  return result;
}