[tlamponi]

Obviously, but additionally, providing validation on the frontend can help UX a lot. Doing that can provide much quicker feedback compared to an error thrown at the user only after submitting a form, which can get especially annoying if the latter loses (some of) its values due to submission. And one solution for that problem can be using a native picker.

[padjo]

That is called input assistance, confusing it with validation is the source of millions of security problems.

[__jonas]

That’s an interesting suggestion, but it is not, it’s called (client side) form validation

https://html.spec.whatwg.org/multipage/forms.html#client-sid...

I definitely see your reasoning for wishing it had a different name though.

[tlamponi]

No, it's not. And if that's what confuses one, it will not be the actual source of these problems.