Node.js get local IP address

getIPAddress.js

function getIPAddress(){
  var interfaces = require('os').networkInterfaces();
  for(var devName in interfaces){
    var iface = interfaces[devName];
    for(var i=0;i<iface.length;i++){
       var alias = iface[i];
       if(alias.family === 'IPv4' && alias.address !== '127.0.0.1' && !alias.internal){
         return alias.address;
       }
    }
  }
}