psl

import psl from 'psl'; // Parse a simple domain const simpleDomain = 'example.com'; const parsedSimple = psl.parse(simpleDomain); console.log(`Parsing "${simpleDomain}":`); console.log(` TLD: ${parsedSimple.tld}`); // 'com' console.log(` SLD: ${parsedSimple.sld}`); // 'example' console.log(` Domain: ${parsedSimple.domain}`); // 'example.com' console.log(` Subdomain: ${parsedSimple.subdomain}`); // null // Parse a domain with multiple subdomains const complexDomain = 'a.b.c.foo.co.uk'; const parsedComplex = psl.parse(complexDomain); console.log(`\nParsing "${complexDomain}":`); console.log(` TLD: ${parsedComplex.tld}`); // 'co.uk' console.log(` SLD: ${parsedComplex.sld}`); // 'foo' console.log(` Domain: ${parsedComplex.domain}`); // 'foo.co.uk' console.log(` Subdomain: ${parsedComplex.subdomain}`); // 'a.b.c' // Get just the domain name (SLD + TLD) const domainOnly = psl.get('www.sub.example.net'); console.log(`\nGetting domain for "www.sub.example.net": ${domainOnly}`); // 'example.net' // Handle invalid or null input for psl.get const invalidDomain = psl.get('invalid'); const nullDomain = psl.get(null); console.log(`Getting domain for "invalid": ${invalidDomain}`); // null console.log(`Getting domain for null: ${nullDomain}`); // null