SignupForm.js

import React from 'react';
import { Formik } from 'formik';
import * as Yup from 'yup';

const SignupForm = () => {
  return (
    <div>
      <div>
        <h1 className="text-center">회원가입</h1>
      </div>
      <Formik
        initialValues={{
          userID: '',
          password: '',
          repassword: '',
          userName: '',
          userStudNum: ''
        }}

        validationSchema={Yup.object({
          userId: Yup.string()
            .required('아이디를 입력해주세요.')
            .max(15, '15자 이내로 입력해주세요.')
            .min(5, '최소 5자 이상 입력해주세요.'),
          password: Yup.string()
            .required('비밀번호를 입력해주세요.')
            .min(8, '최소 8자 이상 입력해주세요.'),
          repassword: Yup.string()
            .required('비밀번호를 입력해주세요.')
            .min(8, '최소 8자 이상 입력해주세요.')
            .oneOf([Yup.ref("password"), null], '비밀번호가 일치하지 않습니다.'),
          userName: Yup.string()
            .required('이름을 입력해주세요.'),
          userStudNum: Yup.string()
            .required('학번을 입력해주세요.')
            .min(7, '학번을 정확히 입력해주세요.'),
        })}
        onSubmit={(values, { setSubmitting }) => {
          setTimeout(() => {
            alert(JSON.stringify(values, null, 2));
            setSubmitting(false);
          }, 400);
        }}
      >
        {formik => (
          <form onSubmit={formik.handleSubmit}>
            <div>
              <label className="form-label">아이디</label>
              <input type="text" name="userID"
                className="form-control border-top-0 border-end-0 border-start-0"
                {...formik.getFieldProps('userID')} />
              {formik.touched.userID && formik.errors.userID ? (
                <div className="text-secondary">{formik.errors.userID}</div>
              ) : null}
            </div>
            <div>
              <label className="form-label">비밀번호</label>
              <input type="password" name="password"
                className="form-control border-top-0 border-end-0 border-start-0"
                {...formik.getFieldProps('password')} />
              {formik.touched.password && formik.errors.password ? (
                <div className="text-secondary">{formik.errors.password}</div>
              ) : null}
            </div>
            <div>
              <label className="form-label">비밀번호 확인</label>
              <input type="password" name="repassword"
                className="form-control border-top-0 border-end-0 border-start-0"
                {...formik.getFieldProps('repassword')} />
              {formik.touched.repassword && formik.errors.repassword ? (
                <div className="text-secondary">{formik.errors.repassword}</div>
              ) : null}
            </div>
            <div>
              <label className="form-label">이름</label>
              <input type="text" name="userName"
                className="form-control border-top-0 border-end-0 border-start-0"
                {...formik.getFieldProps('userName')} />
              {formik.touched.userName && formik.errors.userName ? (
                <div className="text-secondary">{formik.errors.userName}</div>
              ) : null}
            </div>
            <div>
              <label className="form-label">학번</label>
              <input type="text" name="userStudNum"
                className="form-control border-top-0 border-end-0 border-start-0"
                {...formik.getFieldProps('userStudNum')} />
              {formik.touched.userStudNum && formik.errors.userStudNum ? (
                <div className="text-secondary">{formik.errors.userStudNum}</div>
              ) : null}
            </div>
            <button type="submit">확인</button>
          </form>
        )}
      </Formik>
    </div>
  );
}

export default SignupForm;