Does/will this correctly handle `| undefined` vs `?`, i.e. correct behavior unde...

x1000 · on Oct 9, 2024

I ran into exactly same pain point which was enough to nullify the benefits of using zod at all.

gkiely · on Oct 10, 2024

It does: https://valibot.dev/guides/optionals/#use-in-objects

  import * as v from 'valibot';
  const OptionalKeySchema = v.object({ key: v.optional(v.string()) });
  type t1 = v.InferInput<typeof OptionalKeySchema>; // { key?: string }

  const UndefinedKeySchema = v.object({ key: v.undefinedable(v.string()) });
  type t2 = v.InferInput<typeof UndefinedKeySchema>; // { key: undefined }

aleclarsoniv · on Oct 10, 2024

TypeBox[1] differentiates between optional and undefined.

[1]: https://github.com/sinclairzx81/typebox