node check if internet

To check if there is an internet connection in Node.js, you can use the dns module to perform a DNS resolution. Here are the steps:

1. Import the dns module using const dns = require('dns');.

2. Use the lookup method of the dns module to perform a DNS resolution. For example: javascript dns.lookup('google.com', (err, address, family) => { if (err) { console.log('No internet connection'); } else { console.log('Internet connection available'); } });

3. In the callback function of the lookup method, check for the presence of an error. If an error is present, log "No internet connection"; otherwise, log "Internet connection available".

These steps use the dns module to perform a DNS resolution and determine the availability of an internet connection in Node.js.