js顶部广告收缩通栏

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Top Ad Banner</title>
    <style>
        #ad-banner {
            height: 100px;
            background-color: #ccc;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: height 0.3s ease;
        }
        #ad-banner.collapsed {
            height: 30px;
        }
        #toggle-btn {
            margin-top: 10px;
        }
    </style>
</head>
<body>
    <div id="ad-banner">
        <span>广告内容</span>
    </div>
    <button id="toggle-btn">收缩广告</button>

    <script>
        const adBanner = document.getElementById('ad-banner');
        const toggleBtn = document.getElementById('toggle-btn');

        toggleBtn.addEventListener('click', () => {
            adBanner.classList.toggle('collapsed');
            toggleBtn.textContent = adBanner.classList.contains('collapsed') ? '展开广告' : '收缩广告';
        });
    </script>
</body>
</html>