export const TAB = 'Tab' ; export const ENTER = 'Enter' ; export const ESC = 'Escape' ; export const SPACE = ' ' ; export const BACKSPACE = 'Backspace' ; export const ALT = 'Alt' ; export const SHIFT = 'Shift' ; export const CONTROL = 'Control' ; export const PAUSE = 'Pause' ; export const END = 'End' ; export const HOME = 'Home' ; export const DELETE = 'Delete' ; export const PAGE_UP = 'PageUp' ; export const PAGE_DOWN = 'PageDown' ; export const ARROW_LEFT = 'ArrowLeft' ; export const ARROW_UP = 'ArrowUp' ; export const ARROW_RIGHT = 'ArrowRight' ; export const ARROW_DOWN = 'ArrowDown' ; export const SYSTEM_KEYS = [ TAB , ALT , SHIFT , CONTROL , PAGE_UP , PAGE_DOWN , ARROW_LEFT , ARROW_UP , ARROW_RIGHT , ARROW_DOWN ] ;