Specifying default value stimulus unclear error message

When specifying values on controller, there's in console very unclear message that can waste your time debugging.

So passing the following value in controller

export default class extends Controller {
  static values = {
    turboFrameName: { type: String },
  }
}

will produce

Uncaught Error: Type "string" must match the type of the default value. Given default value: "undefined" as "undefined"

Actually I thought that those two constructions are identical
plain type and the above specified as hash

export default class extends Controller {
  static values = {
    turboFrameName: String,
  }

For me the error message looks something unclear and I don't understand what should be done (in fact it was just typo for me, I didn't know that this construction with hash options can only be used with default option)

There are 2 solutions in my opinion:

• Adjust error message something like: Value "turboFrameName" with type "string" missing default value. Given default value: "undefined"
• Allow both constructions to be used visa-versa, with and without default value, and specify default value only if you need one, but not throw uncaught error

Reproduce the controller values examples from the issue and inspect the validation path that handles a type-only value versus an options object. Done means either the missing-default error clearly identifies the value, type, and required default, or both forms are accepted consistently; the issue does not specify files or tests.