（一）写恐吓信或者以其他方法威胁他人人身安全的；
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.
。关于这个话题，搜狗输入法下载提供了深入分析
Christian-Rep-Perisa
Self-driving truck startup Einride raises $113M PIPE ahead of public debut