import { useForm } from 'react-hook-form';
import { typanionResolver } from '@hookform/resolvers/typanion';
import * as t from 'typanion';

const isUser = t.isObject({
  username: t.applyCascade(t.isString(), [t.hasMinLength(1)]),
  age: t.applyCascade(t.isNumber(), [t.isInteger(), t.isInInclusiveRange(1, 100)]),
});

const App = () => {
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm({
    resolver: typanionResolver(isUser),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('name')} />
      {errors.name?.message && <p>{errors.name?.message}</p>}
      <input type="number" {...register('age')} />
      {errors.age?.message && <p>{errors.age?.message}</p>}
      <input type="submit" />
    </form>
  );
};