在react.js中从下拉列表中获取初始值

import React, { useState } from 'react';

function MyComponent() {
  const [selectedValue, setSelectedValue] = useState('');

  // 处理下拉列表选中值变化的回调函数
  const handleSelectChange = (event) => {
    setSelectedValue(event.target.value);
  };

  return (
    <div>
      <select value={selectedValue} onChange={handleSelectChange}>
        <option value="option1">选项1</option>
        <option value="option2">选项2</option>
        <option value="option3">选项3</option>
      </select>
      <p>选中的值：{selectedValue}</p>
    </div>
  );
}

export default MyComponent;