JavaScript module for parsing hostname, based on the The Public Suffix List.
A "public suffix" is one under which Internet users can (or historically could) directly register names. Some examples of public suffixes are .com, .co.uk and pvt.k12.ma.us. The Public Suffix List is a list of all known public suffixes.
See https://publicsuffix.org/ and the Wiki link above for more information.
Include psl.js as a module and import to use.
parse() returns an Object with the following properties:
- subdomain:
stringparts before the domain - domain:
stringdomain name (i.e. sld + tld) - sld:
stringSecond level domain (i.e. domain without tld) - tld:
stringTop level domain (i.e. The Public Suffix)
import {PSL} from './psl.js';
// hostname without subdomain
const psl1 = PSL.parse('example.com');
console.log(psl1.subdomain); // ''
console.log(psl1.domain); // 'example.com'
console.log(psl1.sld); // 'example'
console.log(psl1.tld); // 'com'
// hostname with subdomain
const psl2 = PSL.parse('www.example.com');
console.log(psl2.subdomain); // 'www'
console.log(psl2.domain); // 'example.com'
console.log(psl2.sld); // 'example'
console.log(psl2.tld); // 'com'
// hostname with nested subdomains
const psl3 = PSL.parse('a.b.c.example.com');
console.log(psl3.subdomain); // 'a.b.c'
console.log(psl3.domain); // 'example.com'
console.log(psl3.sld); // 'example'
console.log(psl3.tld); // 'com'