单页可拖动悬浮按钮代码，适配于手机浏览-记录我的美好生活萝莉工坊

代码如下：
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>移动的悬浮圆形按钮</title>
    <style>
        body {
            margin: 0;
            height: 100vh;
            overflow: hidden; /* 隐藏滚动条 */
            position: relative; /* 使按钮定位相对于页面 */
        }

        .floating-button {
            width: 50px;
            height: 50px;
            background-color: #ff6aaa;
            color: white;
            border: none;
            border-radius: 50%; /* 圆形 */
            position: absolute;
            bottom: calc(50% - 25px); /* 垂直居中 */
            right: 5px; /* 距离右侧 20px */
            cursor: pointer;
            display: flex;
            justify-content: center;
            align-items: center;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
            transition: background-color 0.3s;
        }

        .floating-button:hover {
            background-color: #ff6a6a; /* 悬停时变色 */
        }

        .toc-container {
            color: #434343;
            font-family: 'Noto Serif SC', serif;
            position: fixed;
            top: 20px; /* 距离顶部 20px */
            left: 50%; /* 居中 */
            transform: translateX(-50%); /* 使其完全水平居中 */
            width: 200px;
            background-color: #f9f9f9;
            border: 1px solid #ddd;
            padding: 5px 20px;
            border-radius: 5px;
            max-height: 600px;
            overflow-y: auto;
            margin-top: 1px;
            display: none; /* 默认隐藏 */
        }

        .toc-container h2 { 
            color: #ff6a6a;
            font-weight: bold;
            margin-bottom: 5px;
            text-align: center;
        }

        .toc-container ul {
            list-style-type: none;
            padding-left: 0;
        }

        .toc-container ul li {
            margin: 5px 0;
        }

        .toc-container ul li a {
            color: #434343;
            font-size: 16px;
            line-height: 1.9;
            letter-spacing: 0.1em;
            text-decoration: none;
        }

        .toc-container ul li a:hover {
            color: #ff6a6a;
        }

        .toc-container a {
            color: #434343;
            font-size: 16px;
            line-height: 1.9;
            letter-spacing: 0.1em;
            text-decoration: none;
        }

        .toc-container a:hover {
            color: #ff6a6a;
        }

        hr {
            border: none; /* 去掉默认边框 */
            height: 1px; /* 设置水平线的高度 */
            background-color: #ff6a6a; /* 设置背景颜色 */
            margin: 2px 0; /* 设置上下边距 */
        }
    </style>
</head>
<body>

    <div class="toc-container" id="tocContainer">
        <h2>目 录</h2>
        <hr>
        <ul>
            <li><a href="#section-0">1. 检测来访源，设置站点白名单</a></li>
            <li><a href="#section-1">2. 开启跨域访问验证</a></li>
            <li><a href="#section-2">3. 检测 HTTP 头部是否非正常访问</a></li>
       
        <hr>
       <a href="/" target="_self">返回主页</a>&emsp;&emsp;&emsp;
        <a href="javascript:void(0);" onclick="scrollToTop()" target="_self">返回顶部</a>
        <hr>
         </ul>
<p style="text-align: center;">
            <a href="/" target="_self" style="font-weight: bold; color: #ff6a6a;"> 【1】 </a>
        </p>
    </div>

    <button class="floating-button" id="floatingButton">+</button>

    <script>
        const button = document.getElementById('floatingButton');
        const tocContainer = document.getElementById('tocContainer');

        // 点击按钮显示或隐藏 .toc-container
        button.onclick = function () {
            if (tocContainer.style.display === "none" || tocContainer.style.display === "") {
                tocContainer.style.display = "block"; // 显示目录
            } else {
                tocContainer.style.display = "none"; // 隐藏目录
            }
        };

        // 鼠标按下事件 - 使按钮可拖动
        button.onmousedown = function (event) {
            let shiftX = event.clientX - button.getBoundingClientRect().left;
            let shiftY = event.clientY - button.getBoundingClientRect().top;

            button.style.position = 'absolute';
            button.style.zIndex = 1000; // 确保按钮在最上层

            function moveAt(pageX, pageY) {
                button.style.left = pageX - shiftX + 'px';
                button.style.top = pageY - shiftY + 'px';
            }

            function onMouseMove(event) {
                moveAt(event.pageX, event.pageY);
            }

            document.addEventListener('mousemove', onMouseMove);

            button.onmouseup = function () {
                document.removeEventListener('mousemove', onMouseMove);
                button.onmouseup = null;
            };
        };

        button.ondragstart = function () {
            return false;
        };

        // 支持触摸事件 - 移动按钮
        button.ontouchstart = function (event) {
            let touch = event.touches[0];
            let shiftX = touch.clientX - button.getBoundingClientRect().left;
            let shiftY = touch.clientY - button.getBoundingClientRect().top;

            function moveAt(pageX, pageY) {
                button.style.left = pageX - shiftX + 'px';
                button.style.top = pageY - shiftY + 'px';
            }

            function onTouchMove(event) {
                let touch = event.touches[0];
                moveAt(touch.pageX, touch.pageY);
            }

            document.addEventListener('touchmove', onTouchMove);

            button.ontouchend = function () {
                document.removeEventListener('touchmove', onTouchMove);
                button.ontouchend = null;
            };
        };
    </script>

</body>
</html>
本文作者为萝莉工坊，转载请注明。