a doh (dns-over-http) client which discriminate against no globalThis.
This package main purpose is to serve as a browser polyfill for node
built-in package dns and dns/promises (which is the promisified version of dns).
Since the DNS protocol runs over UDP protocol and webpages cannot access the underlying OS sockets,
dah-doh allows to perform DNS queries and NS lookups over the DOH protocol using mainly
- dns.google [
8.8.8.8,8.8.4.4] - cloudflare-dns.com/dns.cloudflare.net/one.one.one.one [
1.1.1.1]
while providing the same module interface of node dns module.
// TODO
When using es modules
import 'doh-dah/polyfill'
import * as dns from 'doh-dah'or in commonjs
require('doh-dah/polyfill')
const dns = require('doh-dah')When using es modules
import * as dns from 'doh-dah'or in commonjs
const dns = require('doh-dah')<!DOCTYPE html>
<html lang="en">
<head>
<script type="importmap">
{
"imports": {
"dns": "https://cdn.jsdelivr.net/npm/dah-doh@latest/dist/index.es.js"
}
}
</script>
<!-- rest of head -->
</head>
<body>
<script async type="module">
import * as dns from 'dns'
await dns.promises.resolvePtr('8.8.8.8.in-addr.arpa')
.then(([dnsGoogle]) => {
console.assert(dnsGoogle === 'dns.google')
})
</script>
<!-- your application -->
</body>
</html><!DOCTYPE html>
<html lang="en">
<head>
<!-- Polyfills -->
<!-- https://caniuse.com/mdn-javascript_builtins_globalthis -->
<script src="https://cdn.jsdelivr.net/npm/@ungap/global-this/min.js"></script>
<!-- https://caniuse.com/promises -->
<script src="https://cdn.jsdelivr.net/npm/promise-polyfill@8/dist/polyfill.min.js"></script>
<!-- https://caniuse.com/fetch -->
<script src="https://cdn.jsdelivr.net/npm/whatwg-fetch@3.6.2/dist/fetch.umd.min.js"></script>
<!-- End of polyfills -->
<script src="https://cdn.jsdelivr.net/npm/dah-doh@latest/dist/es5/index.umd.js"></script>
<!-- rest of head -->
</head>
<body>
<script>
globalThis.dahDoh
.resolvePtr('8.8.8.8.in-addr.arpa', (err, [dnsGoogle]) => {
console.assert(err === null)
console.assert(dnsGoogle === 'dns.google')
})
</script>
<!-- your application -->
</body>
</html>