Input methods are managed by the OS, the browser delegates control. It can't do that over a simulated input control rendered on a canvas. Also what I mean is th

Input methods are managed by the OS, the browser delegates control. It can't do that over a simulated input control rendered on a canvas. Also what I mean is that all these are problems already solved by browsers that follow w3c recommendations, custom rendering solutions will have to reimplement everything without access to OS APIs that make many of those things possible in a unified way.