what is the key code for shift+tab?

Question

I am working on key mapping. The problem is that when I press the TAB button down it navigates to the next input field.

TAB has key of 9 and
DO

Answer 1

There's no "keycode", it's a separate property on the event object, like this:

if(event.shiftKey && event.keyCode == 9) { 
  //shift was down when tab was pressed
}