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.
Opens in a new window，推荐阅读Line官方版本下载获取更多信息
。爱思助手下载最新版本对此有专业解读
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This Tweet is currently unavailable. It might be loading or has been removed.，这一点在夫子中也有详细论述
// Can be any thing here that writes into the view