如何计算Checkbox和TextField以获得总数

<input type="checkbox" id="checkbox1">
<input type="checkbox" id="checkbox2">
<input type="text" id="textField1">
<input type="text" id="textField2">
<button onclick="calculateTotal()">计算总数</button>

function calculateTotal() {
  var checkbox1 = document.getElementById("checkbox1");
  var checkbox2 = document.getElementById("checkbox2");
  var textField1 = document.getElementById("textField1");
  var textField2 = document.getElementById("textField2");

  var checkboxCount = 0;
  if (checkbox1.checked) {
    checkboxCount++;
  }
  if (checkbox2.checked) {
    checkboxCount++;
  }

  var textFieldCount = parseInt(textField1.value) + parseInt(textField2.value);

  var total = checkboxCount + textFieldCount;
  alert("总数为：" + total);
}

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

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

app.post("/calculate", (req, res) => {
  const checkboxCount = req.body.checkbox1 === "on" ? 1 : 0 + req.body.checkbox2 === "on" ? 1 : 0;
  const textFieldCount = parseInt(req.body.textField1) + parseInt(req.body.textField2);
  const total = checkboxCount + textFieldCount;
  res.send("总数为：" + total);
});

app.listen(3000, () => {
  console.log("服务器已启动，监听端口3000");
});