The `ntp-client` package provides a pure JavaScript implementation of the NTP (Network Time Protocol) client, allowing Node.js applications to retrieve the current network time from an NTP server. Its latest stable version, 0.5.3, was published over a decade ago in 2014, indicating that the project is largely abandoned. It differentiates itself by offering a minimal codebase with zero external dependencies, directly handling the NTP protocol for basic time retrieval. However, due to its lack of recent updates and maintenance, users might consider more actively maintained alternatives like `ntp-client-promise` or `ntp-time` for modern Node.js environments, especially those requiring ESM support or advanced features. An `@types/ntp-client` package exists, last updated in 2023, providing TypeScript definitions for version 0.5.0.
npm install ntp-clientVerified import paths — ran on the pinned version, not inferred.
Demonstrates how to fetch the current network time from a specified NTP server using the `getNetworkTime` function and log the result.
Use `const ntpClient = require('ntp-client');` for CommonJS environments. For ES Module projects, either configure a transpiler (e.g., Babel, TypeScript) or use dynamic `import('ntp-client')`. Consider alternatives like `ntp-client-promise` for native ESM support.Assess the risk for your application. For critical or production applications, consider migrating to actively maintained NTP client libraries like `ntp-client-promise` or `ntp-time` that receive regular updates and support.
Understand that this library is for one-shot time retrieval. For robust, continuous system time synchronization, rely on operating system NTP services (e.g., `ntpd`, `systemd-timesyncd` on Linux, Windows Time service) or dedicated NTP daemon implementations.
Ensure your Node.js process has necessary network binding permissions. For production, consider configuring your network or server to allow binding to port 123, or use a non-privileged port (e.g., 8123) if your NTP server explicitly supports it. Running with `sudo node app.js` can temporarily fix this for testing but is not recommended for production.
Run the Node.js process with `sudo` or as an administrator (not recommended for production). Alternatively, configure your NTP server to listen on a non-privileged port (e.g., above 1024) and specify that port in `getNetworkTime`.
Verify that `pool.ntp.org` (or your chosen server) is reachable and port 123 is open in your firewall. Check your internet connection. You can increase the timeout by passing an options object: `ntpClient.getNetworkTime('pool.ntp.org', 123, { timeout: 20000 }, function(err, date) { ... })`.Ensure the package is installed (`npm install ntp-client`) and imported correctly using `const ntpClient = require('ntp-client');`. Verify no destructuring is used: `getNetworkTime` is a method of the default export object, not a named export.No dependency data recorded yet.