react-hook-form/app/src/basicSchemaValidation.tsx

import React from 'react';
import { useForm, ValidationMode } from 'react-hook-form';
import { yupResolver } from '@hookform/resolvers/yup';
import * as yup from 'yup';
import { useParams } from 'react-router-dom';

let renderCounter = 0;

const validationSchema = yup
  .object()
  .shape(
    {
      firstName: yup.string().required(),
      lastName: yup.string().max(5).required(),
      min: yup.number().min(10),
      max: yup.number().max(20),
      minDate: yup.date().min('2019-08-01'),
      maxDate: yup.date().max('2019-08-01'),
      minLength: yup.string().min(2),
      minRequiredLength: yup.string().min(2).required(),
      selectNumber: yup.string().required(),
      pattern: yup.string().matches(/\d+/),
      radio: yup.string().required(),
      checkbox: yup.string().required(),
      exclusivelyRequiredOne: yup.string().when('exclusivelyRequiredTwo', {
        is: '',
        then: () => yup.string().required(),
        otherwise: () => yup.string().length(0),
      }),
      exclusivelyRequiredTwo: yup.string().when('exclusivelyRequiredOne', {
        is: '',
        then: () => yup.string().required(),
        otherwise: () => yup.string().length(0),
      }),
    },
    [['exclusivelyRequiredOne', 'exclusivelyRequiredTwo']],
  )
  .required();

const BasicSchemaValidation: React.FC = () => {
  const { mode } = useParams();
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm<{
    firstName: string;
    lastName: string;
    min: string;
    max: string;
    minDate: string;
    maxDate: string;
    minLength: string;
    minRequiredLength: string;
    selectNumber: string;
    pattern: string;
    radio: string;
    checkbox: string;
    multiple: string;
    validate: string;
  }>({
    resolver: yupResolver(validationSchema),
    mode: mode as keyof ValidationMode,
  });
  const onSubmit = () => {};

  renderCounter++;

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <input {...register('firstName')} placeholder="firstName" />
      {errors.firstName && <p>firstName error</p>}
      <input {...register('lastName')} placeholder="lastName" />
      {errors.lastName && <p>lastName error</p>}
      <input type="number" {...register('min')} placeholder="min" />
      {errors.min && <p>min error</p>}
      <input type="number" {...register('max')} placeholder="max" />
      {errors.max && <p>max error</p>}
      <input type="date" {...register('minDate')} placeholder="minDate" />
      {errors.minDate && <p>minDate error</p>}
      <input type="date" {...register('maxDate')} placeholder="maxDate" />
      {errors.maxDate && <p>maxDate error</p>}
      <input {...register('minLength')} placeholder="minLength" />
      {errors.minLength && <p>minLength error</p>}
      <input
        {...register('minRequiredLength')}
        placeholder="minRequiredLength"
      />
      {errors.minRequiredLength && <p>minRequiredLength error</p>}
      <select {...register('selectNumber')}>
        <option value="">Select</option>
        <option value={1}>1</option>
        <option value={2}>1</option>
      </select>
      {errors.selectNumber && <p>selectNumber error</p>}
      <input {...register('pattern')} placeholder="pattern" />
      {errors.pattern && <p>pattern error</p>}
      Radio1
      <input type="radio" {...register('radio')} value="1" />
      Radio2
      <input type="radio" {...register('radio')} value="2" />
      Radio3
      <input type="radio" {...register('radio')} value="3" />
      {errors.radio && <p>radio error</p>}
      <input type="checkbox" {...register('checkbox')} />
      {errors.checkbox && <p>checkbox error</p>}
      <button>Submit</button>
      <div id="renderCount">{renderCounter}</div>
    </form>
  );
};

export default BasicSchemaValidation;