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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.
。关于这个话题，爱思助手下载最新版本提供了深入分析
Here's the equivalent with the new API:，详情可参考同城约会
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，妈咪，有人出，有人进，惟一不变的是，这里贩卖快乐，也诉衷肠。