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hi, as already mentioned here, we want to include as few dependencies as possible in the core

thanks for the effort, but another solution to minimize this external dependency for everyone would be better for the core
e.g. about the possibility to add other contrains from outside

you are welcome to work on it in the beta branch for version 3

we don't want new feature requests for v2 at the moment, because we want to stop the development there for now

No problem but is it acceptable if I write regexp for ulid instead of using oklog/ulidpkg.

well, then the exam would only be half right
since there are many possibilities for contrains, but we shouldn't cover them all within the core, i think you should make them expandable

we can't possibly include all patterns, such as uuidv3, uuidv4, ulid etc.

to solve the problem on your side/project, however, you could use a regex contrain in your route

It's a solution.
If I can suggest to make route constraint plugable similar to go-playground/validator.
I'll try to create a PR if it's acceptable.

Hi @ReneWerner87,
After trying to add regex(expression) I faced a new issue, in path all constraints will be lower-case. the solution is to add config.CaseSensitive = true to fiber.App() which is not ideal.