get lan ip in node.js

getLanAddress.js

const os = require('os')
function getLanAddress() {
  const ifaces = os.networkInterfaces();

  if (ifaces) {
    for (const dev of Object.keys(ifaces)) {
      for (const details of ifaces[dev]) {
        if (details.family === 'IPv4' && details.mac !== '00:00:00:00:00:00') {
          return details.address;
        }
      }
    }
  }

  return '127.0.0.1';
}