在React.js表单中进行必需的输入

<input type="text" required />

import { useFormik } from 'formik';

const MyForm = () => {
  const formik = useFormik({
    initialValues: {
      name: '',
      email: '',
    },
    validationSchema: Yup.object({
      name: Yup.string().required('Name is required'),
      email: Yup.string().email('Invalid email').required('Email is required'),
    }),
    onSubmit: values => {
      // 处理表单提交
    },
  });

  return (
    <form onSubmit={formik.handleSubmit}>
      <input
        type="text"
        name="name"
        value={formik.values.name}
        onChange={formik.handleChange}
        onBlur={formik.handleBlur}
      />
      {formik.touched.name && formik.errors.name ? (
        <div>{formik.errors.name}</div>
      ) : null}

      <input
        type="email"
        name="email"
        value={formik.values.email}
        onChange={formik.handleChange}
        onBlur={formik.handleBlur}
      />
      {formik.touched.email && formik.errors.email ? (
        <div>{formik.errors.email}</div>
      ) : null}

      <button type="submit">Submit</button>
    </form>
  );
};

import React, { useState } from 'react';

const MyForm = () => {
  const [name, setName] = useState('');
  const [email, setEmail] = useState('');
  const [nameError, setNameError] = useState('');
  const [emailError, setEmailError] = useState('');

  const handleSubmit = e => {
    e.preventDefault();

    // 检查必填条件
    if (name === '') {
      setNameError('Name is required');
    } else {
      setNameError('');
    }

    if (email === '') {
      setEmailError('Email is required');
    } else {
      setEmailError('');
    }

    // 处理表单提交
  };

  return (
    <form onSubmit={handleSubmit}>
      <input
        type="text"
        value={name}
        onChange={e => setName(e.target.value)}
      />
      {nameError && <div>{nameError}</div>}

      <input
        type="email"
        value={email}
        onChange={e => setEmail(e.target.value)}
      />
      {emailError && <div>{emailError}</div>}

      <button type="submit">Submit</button>
    </form>
  );
};