how to use dns.resolvecname in javascript

To use dns.resolveCname() method in Node.js, you need to first import the dns module as shown below:

index.tsx
const dns = require('dns');
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Then, you can use the dns.resolveCname() method to resolve a CNAME (Canonical Name) record for a given domain name. The CNAME record maps an alias name to the real (canonical) name. Here's the basic syntax of the dns.resolveCname() method:

index.tsx
dns.resolveCname(hostname, callback);
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where hostname is the domain name for which you want to resolve the CNAME record, and callback is a function that will be called with two arguments: a possible error message, and an array of CNAME records (if any).

Here's an example that demonstrates the use of dns.resolveCname() method:

index.tsx
const dns = require('dns');

const hostname = 'www.google.com';

 dns.resolveCname(hostname, (err,records) => {
    if (err) {
        console.log(err);
    } else {
        console.log(`CNAME records for ${hostname}: ${records}`);
    }
});
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In this example, the dns.resolveCname() method is called with the hostname value of www.google.com. The callback function will log either an error message, if there was an error, or the CNAME records for the specified hostname.