Shadow DOM is a web component feature that lets you attach an isolated DOM subtree to any HTML element, hidden from the main document’s standard queries. A querySelector('audio') on the main document cannot see inside a Shadow Root unless you specifically traverse into it. If fermaw’s player was mounted inside a Shadow Root, basic DOM searches would come up empty.
Tony Jolliffe BBC，这一点在快连下载安装中也有详细论述
[&:first-child]:overflow-hidden [&:first-child]:max-h-full"，更多细节参见Safew下载
微信上线新功能：同一文件多聊转发不重复占存储。爱思助手下载最新版本对此有专业解读