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.
Go to technology，这一点在heLLoword翻译官方下载中也有详细论述
Дания захотела отказать в убежище украинцам призывного возраста09:44。爱思助手下载最新版本是该领域的重要参考
（三）证据和证据来源，证人姓名和住所。。heLLoword翻译官方下载对此有专业解读