I am using what you are saying in your doc. The one says should send a 400 status code.

But nothing happened when using it. Is the doc missing something ?

First of all thanks for this very useful library.

The issue I'd like to report deals with using schema with type ZodEffects. Such schema can be produced by using z.refine on z.object as shown in example below. This produces a TS error. See https://codesandbox.io/s/morning-bash-oi6h35?file=/server/api/submit.post.ts

import { useValidatedBody, z } from "h3-zod";
import { defineEventHandler } from "h3";
import dayjs from "dayjs";

const bodySchema = z
  .object({
    fromDate: z.string().optional(),
    toDate: z.string().optional()
  })
  .refine(
    (schema) =>
      !!schema.fromDate && !!schema.toDate
        ? dayjs(schema.fromDate).isBefore(schema.toDate)
        : true,
    "'fromDate' has to be before 'toDate'"
  );

export default defineEventHandler(async (event) => {
  const body = await useValidatedBody(event, bodySchema);
  return;
});

The solution would be to extend TQuery type like so:

type TQuery<U extends UnknownKeysParam = any> =
  | z.ZodObject<any, U>
  | z.ZodUnion<[TQuery<U>, ...TQuery<U>[]]>
  | z.ZodIntersection<TQuery<U>, TQuery<U>>
  | z.ZodDiscriminatedUnion<string, z.Primitive, z.ZodObject<any, U>>
  | z.ZodEffects<z.ZodTypeAny>; // <-- add this line

Would you like me to open a PR?

First of all big thanks for actively maintaining this package.

Zod schema can use multiple refine validations, which produces type with nested ZodEffects.

Passing this schema to h3-zod gives TS error.

Reproduction:
https://codesandbox.io/s/ecstatic-surf-0u8wo2?file=/server/api/submit.post.ts

Tried this with [email protected], which handled this case OK, but further improvements were made down the line, changing the behaviour.

EDIT: Also the resulting body type is unknown,