channelartlist标签应用实例，它如何在实际项目中发挥作用？

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF8">
    <meta name="viewport" content="width=devicewidth, initialscale=1.0">
    <title>Channel Art List Example</title>
</head>
<body>
    <!示例：使用channelartlist标签调用实例 >
    <iframe id="myIframe" src="https://www.example.com/my_channel_page.html" frameborder="0" width="100%" height="500px">
        <p>Your browser does not support iframes.</p>
    </iframe>
    <script>
        // JavaScript代码，用于在iframe中添加channelartlist标签
        var iframe = document.getElementById('myIframe');
        var iframeDocument = iframe.contentDocument || iframe.contentWindow.document;
        // 创建channelartlist元素
        var channelArtList = iframeDocument.createElement('channelartlist');
        // 设置属性
        channelArtList.setAttribute('type', 'application/vnd.apple.itunes_residual');
        channelArtList.setAttribute('title', 'My Channel Art');
        channelArtList.setAttribute('width', '1920');
        channelArtList.setAttribute('height', '1080');
        // 创建artwork元素
        var artwork = iframeDocument.createElement('artwork');
        artwork.setAttribute('href', 'https://www.example.com/channel_artwork.jpg');
        artwork.setAttribute('text', 'Channel Artwork');
        // 将artwork元素添加到channelartlist元素中
        channelArtList.appendChild(artwork);
        // 将channelartlist元素添加到iframe的body中
        iframeDocument.body.appendChild(channelArtList);
    </script>
</body>
</html>

说明：