Context

• node version: 10.11.0
• joi version: 14.3.1
• environment (node, browser): node
• used with (hapi, standalone, ...): standalone

What are you trying to achieve or the steps to reproduce ?

I'd like to sanity check urls that my users enter, but Joi.string().uri() accepts a url without a hostname at all:

const schema = Joi.string().uri()
console.log(Joi.validate('https://', schema));

Which result you had ?

{ error: null, ...}

What did you expect ?

That a host name is required. It's not very helpful to allow "https://" in most scenarios.

None of the options for uri help with this.

It seems like it comes down to a very liberal regName regexp that also allows the empty string:

I understand that the idea behind rfc3986.js is to do a 1-to-1 translation of the URL RFC, and that reg-name is defined exactly like this in https://tools.ietf.org/html/rfc3986#section-3.2.2

... but I'll argue that it's very rare that you want to be that liberal in a validation scenario.