如何获取单击的按钮的值

<button id="myButton" value="按钮值">点击按钮</button>

<script>
    var button = document.getElementById("myButton");
    button.addEventListener("click", function() {
        var buttonValue = button.value;
        console.log("按钮的值是：" + buttonValue);
    });
</script>

// 使用Express框架处理HTTP请求
const express = require('express');
const app = express();

// 定义路由处理POST请求
app.post('/button-click', (req, res) => {
    const buttonValue = req.body.buttonValue;
    console.log("按钮的值是：" + buttonValue);
    res.send("按钮的值是：" + buttonValue);
});

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