web表单中的useEffectHook

import React, { useState, useEffect } from 'react';

const FormComponent = () => {
  const [formData, setFormData] = useState({ name: '', email: '' });

  useEffect(() => {
    // 在组件渲染完成后执行副作用操作
    console.log('组件渲染完成');

    // 清除副作用的示例
    return () => {
      console.log('组件卸载或重新渲染前执行清理操作');
    };
  }, []); // 依赖项数组为空，表示只在组件渲染完成后执行一次

  const handleInputChange = (e) => {
    setFormData({ ...formData, [e.target.name]: e.target.value });
  };

  const handleSubmit = (e) => {
    e.preventDefault();
    // 提交表单的逻辑处理
  };

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

export default FormComponent;