iOS CSS of death
At github published a code that leads to the force restart iOS (11/12 GM) devices when visiting the html-page. Also, Mac OS High Sierra /Mohave hangs when using Safari.
PoC html-page that implements this bug (users of Safari pass to their own fear and risk).
There is an assumption that the bug crept in a level lower than webkit and can lead to more serious consequences. Also, the use of this bug may be applicable in sociotechnical companies and wacky rallies, so I advise extremely suspicious of all links, especially since on iOS all browsers, in fact, it is a superstructure over Safari.