README.md

is-valid-domain

Validate domain name in JavaScript

Demo

https://lab.miguelmota.com/is-valid-domain

Install

npm install is-valid-domain

Usage

const isValidDomain = require('is-valid-domain')

isValidDomain('example.com') // true
isValidDomain('foo.example.com') // true
isValidDomain('bar.foo.example.com') // true
isValidDomain('exa-mple.co.uk') // true
isValidDomain('xn--80ak6aa92e.com') // true
isValidDomain('_dnslink.ipfs.io') // true
isValidDomain('exa_mple.com') // false
isValidDomain('-example.co.uk') // false
isValidDomain('example') // false
isValidDomain('ex*mple.com') // false
isValidDomain('*.example.com') // false
isValidDomain('*.com') // false
isValidDomain(3434) // false

isValidDomain('foo.example.com', {subdomain: true}) // true
isValidDomain('foo.example.com', {subdomain: false}) // false
isValidDomain('*.example.com', {wildcard: false}) // false
isValidDomain('*.example.com', {wildcard: true}) // true
isValidDomain('*.example.com', {subdomain: false, wildcard: true}) // false
isValidDomain('はじめよう.みんな') // false
isValidDomain('はじめよう.みんな', {allowUnicode: true}) // true
isValidDomain('ai.') // false
isValidDomain('ai.', {topLevel: true}) // true

view more examples

Test

npm test

Contributing

Adding new domains:

• Add second level domain to data/second_level_domains.csv
• Run npm run generate to generate JSON map file
• Run npm test

FAQ

• Q: Why is trailing dot . in domain names verified as true?

  • A: Fully qualified domain names allow the trailing dot which represents the root zone. More info here and here.

License

MIT