如何在不更改字段值的情况下提交React表单

import React, { useState } from 'react';

const Form = () => {
  const [formData, setFormData] = useState({
    username: '',
    password: '',
    email: ''
  });

  const handleSubmit = (event) => {
    event.preventDefault();
    // 在这里进行表单提交的操作
    console.log(formData);
  }

  const handleChange = (event) => {
    const { name, value } = event.target;
    setFormData(prevState => ({
      ...prevState,
      [name]: value
    }));
  }

  return (
    <form onSubmit={handleSubmit}>
      <input
        type="text"
        name="username"
        value={formData.username}
        onChange={handleChange}
      />
      <input
        type="password"
        name="password"
        value={formData.password}
        onChange={handleChange}
      />
      <input
        type="email"
        name="email"
        value={formData.email}
        onChange={handleChange}
      />
      <button type="submit">提交</button>
    </form>
  );
}

export default Form;