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// console.log(spanner.next(60)); // 输出1（正确）
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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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Inquiry chair Baroness Hallett and the inquiry legal team have criticised government departments for delays providing documents and blocking the release of key information.，推荐阅读爱思助手下载最新版本获取更多信息