在react本机中选择下拉项时显示文本输入字段

import React, { useState } from 'react';

const DropdownInput = () => {
  const [selectedOption, setSelectedOption] = useState('');
  const [textInput, setTextInput] = useState('');

  const handleOptionChange = (event) => {
    setSelectedOption(event.target.value);
  };

  const handleTextChange = (event) => {
    setTextInput(event.target.value);
  };

  return (
    <div>
      <select value={selectedOption} onChange={handleOptionChange}>
        <option value="">请选择</option>
        <option value="option1">选项1</option>
        <option value="option2">选项2</option>
        <option value="option3">选项3</option>
      </select>
      {selectedOption === '' && (
        <input type="text" value={textInput} onChange={handleTextChange} />
      )}
    </div>
  );
};

export default DropdownInput;