将选定的下拉值从react获取到nodejs

import React, { useState } from 'react';

const Dropdown = () => {
  const [selectedValue, setSelectedValue] = useState('');

  const handleSelectChange = (event) => {
    setSelectedValue(event.target.value);
  };

  return (
    <select value={selectedValue} onChange={handleSelectChange}>
      <option value="option1">Option 1</option>
      <option value="option2">Option 2</option>
      <option value="option3">Option 3</option>
    </select>
  );
};

export default Dropdown;

const express = require('express');
const app = express();

app.post('/selected-value', (req, res) => {
  const selectedValue = req.body.selectedValue;
  // 处理选定的值，例如保存到数据库或进行其他操作
  res.send('Selected value received');
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});