Zet - How do I set a keyboard shortcut in linux that shows an app window if open - and opens it if not?

How do I set a keyboard shortcut in linux that shows an app window if open - and opens it if not?

Using wmctrl with firefox as an example

APP_NAME="firefox" bash -c 'pgrep -x $APP_NAME > /dev/null && wmctrl -x -a $APP_NAME || $APP_NAME &'

#linux