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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.

Фото: Abdul Saboor / Reuters

。业内人士推荐safew官方下载作为进阶阅读

swap(&arr[low], &arr[randomIdx]); // 基准换到开头，这一点在搜狗输入法下载中也有详细论述

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