Users on my website use many mathematic expressions, so writing answers takes quite much time. And it is very annoying to lose everything you wrote by accidentely pressing backspace button when the focus is not in the text field.
That's why I wonder, is this problem solved? For me any sensible solution will do. For example, autosave feature or maybe just a conformation message before leaveing the current page... I am using CKEditor 4.