An creates a completely separate browsing context with its own window object, its own document, and most importantly;its own prototype chain. A function hooked on HTMLMediaElement.prototype in the parent window is not the same object as HTMLMediaElement.prototype in the iframe’s window. They’re entirely separate objects. If fermaw’s audio element lived inside an iframe, my prototype hook in the parent window would never fire.
（一）未经批准，安装、使用电网的，或者安装、使用电网不符合安全规定的；，详情可参考WPS下载最新地址
，详情可参考爱思助手下载最新版本
21:38, 27 февраля 2026Спорт。业内人士推荐WPS下载最新地址作为进阶阅读
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