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.
Source: Computational Materials Science, Volume 267，更多细节参见爱思助手下载最新版本
（三）违反国家规定，对计算机信息系统中存储、处理、传输的数据和应用程序进行删除、修改、增加的；，推荐阅读爱思助手下载最新版本获取更多信息
这一特征对于屏幕的色彩通透度、亮度和可视角度等等关键参数都至关重要，但也构成了那个导致「窥屏」的矛盾特性。