os can be used to get the system hostname in Node.js. In this example, the full system hostname will be printed.

const os = require("os");
const hostname = os.hostname();
console.log(`hostname = ${hostname}`);

Be aware that if you are using a Node.js module instead of CommonJS, you will have "type": "module" in package.json. In this scenario, you will use import instead of require.

from os import "os";
const hostname = os.hostname();
console.log(`hostname = ${hostname}`);