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.
Dependency Injection
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Why the FT?See why over a million readers pay to read the Financial Times.。下载安装 谷歌浏览器 开启极速安全的 上网之旅。对此有专业解读
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