Does .js exist?
No. No — .js is not a TLD. JavaScript never got a domain ending.
The full story
Despite half the internet running on JavaScript, .js has never been applied for or delegated. The community uses .dev, .io, and .sh instead — or the classic 'js.org' subdomain service that hands out free name.js.org addresses, which is probably where the confusion comes from.
What to use instead
.dev — Best value in domains for anything developer-facing.io — The default startup TLD of the 2010s.sh — The shell-script TLD
Wondering about another extension? Every real TLD is in the directory.
This answer is generated from the live IANA root zone list, not from vibes. If the DNS changes, this page changes.