javascript - close chrome app with escape key -


i'm trying create web app chrome , need help. want app made close when user presses escape key (27) , don't know how that.

i have tried piece of code found doesn't work.

window.onload = function() {  $(document).keyup(function(e) {      if (e.keycode == 27) { // escape key maps keycode `27`         window.close();     } });

}

try window.close(). 

     var pressedkeyvalue = keyevent.keycode;      if(pressedkeyvalue == 27)      {        window.close();      }

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