英國超市將巧克力鎖進防盜盒阻止「訂單式」偷竊
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.
，这一点在WPS官方版本下载中也有详细论述
const readable = ReadableStream.from(adapt(input));，这一点在safew官方版本下载中也有详细论述
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