如何在回发时从3个单选按钮列表发送信息？

<input type="radio" id="option1" name="options" value="Option 1">
<label for="option1">Option 1</label>

<input type="radio" id="option2" name="options" value="Option 2">
<label for="option2">Option 2</label>

<input type="radio" id="option3" name="options" value="Option 3">
<label for="option3">Option 3</label>

var options = document.getElementsByName('options');
var submitButton = document.getElementById('submit');

submitButton.addEventListener('click', function() {
  var selectedOption;

  for (var i = 0; i < options.length; i++) {
    if (options[i].checked) {
      selectedOption = options[i].value;
      break;
    }
  }

  // 发送选中的选项到后端
  // 可以使用Ajax请求或表单提交等方式发送数据
});

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

app.use(express.urlencoded({ extended: true }));

app.post('/submit', (req, res) => {
  const selectedOption = req.body.options;
  
  // 处理接收到的选项值
});

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