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.
Москвичей предупредили о резком похолодании09:45
。业内人士推荐51吃瓜作为进阶阅读
Animation: Jacqui VanLiew; source images: Getty Images
It is being added to the list of standard childhood vaccinations from the start of January, and there will be a catch-up programme for older children.