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.
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消息称《GTA 6》发布日期不会再跳票，详情可参考WPS官方版本下载
Unlike IBM, Diebold made it successful.，推荐阅读safew官方版本下载获取更多信息