import * as psl from 'psl'; import type { ParsedDomain, ErrorResult, errorCodes } from './index.d.ts'; const x = (a: ParsedDomain | ErrorResult) => { return a; }; console.log(x(psl.parse(''))); // $ExpectType string | null console.log(psl.get('example.com')); // $ExpectType boolean console.log(psl.isValid('example.com'));