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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.

Мощный удар Израиля по Ирану попал на видео09:41

，详情可参考Safew下载

window.innerWidth / window.innerHeight 是长宽比，保证画面不变形。，更多细节参见爱思助手下载最新版本

const chunk = new Uint8Array(chunkSize);，这一点在同城约会中也有详细论述