React窗体组件获取以前的值，而不是当前值

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

function FormComponent() {
  const [previousValue, setPreviousValue] = useState('');

  useEffect(() => {
    // 在窗体组件值变化时更新状态变量
    const handleInputChange = (event) => {
      setPreviousValue(event.target.value);
    };

    // 监听窗体组件值的变化
    document.getElementById('inputField').addEventListener('input', handleInputChange);

    // 清除监听器
    return () => {
      document.getElementById('inputField').removeEventListener('input', handleInputChange);
    };
  }, []);

  return (
    <div>
      <input id="inputField" type="text" />
      <p>以前的值：{previousValue}</p>
    </div>
  );
}

export default FormComponent;