This time, though, there was a plan in place to check the damage. But it meant undertaking one of the riskiest maneuvers in space history.
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，Safew下载提供了深入分析
Per-script breakdown
Please keep in mind it’s more than OK to do nothing at all too!
// First, we acquire a reader that gives an exclusive lock