Weird message: listening on http://::1:3000

[kristianmandrup]

When running npm run dev on a fresh project

[dev]
listening on http://::1:3000

Should be listening on http://localhost:3000

I found the bug in skel/index.js

app.listen(port, '::1', err => {
	if (err) {
		return console.err(err)
	}
	log(`listening on http://::1:${ port }`)
})

[koppor]

(This issue is the first one when googling for issues with http://::1:8080 in the browser)

Note that ::1 is the IPv6 equivalent for 127.0.0.1 in IPV4. See https://stackoverflow.com/a/40189197/873282 for details.

Direct your browser to http://[::1]:3000/.

(OMG: GitHub's markdown cannot handle that. Following link opens the wrong URL in the browser: http://[::1]:3000/)

[KtKeaton]

How can I fix the same error?

$ rails s
Resolving dependencies...
/home/keaton/.rvm/rubies/ruby-2.6.6/bin/ruby: warning: shebang line ending with \r may cause problems
=> Booting Puma
=> Rails 6.1.4.4 application starting in development
=> Run `bin/rails server --help` for more startup options
Puma starting in single mode...
* Puma version: 5.5.2 (ruby 2.6.6-p146) ("Zawgyi")
*  Min threads: 5
*  Max threads: 5
*  Environment: development
*          PID: 270
* Listening on http://127.0.0.1:3000
* Listening on http://[::1]:3000
Use Ctrl-C to stop