equivalent createjs code for flash keyboard code snippet

for flash cc

stage.addEventListener(KeyboardEvent.KEY_DOWN, fl_KeyboardDownHandler);

function fl_KeyboardDownHandler(event:KeyboardEvent):void

{

  trace("you press any of your keyboard button");

}

for createjs it should altert in browser once i press any button

/*js

stage.addEventListener(KeyboardEvent.KEY_DOWN, fl_KeyboardDownHandler);

function fl_KeyboardDownHandler(event:KeyboardEvent):void

{

  alert('you press any of your keyboard button');

}

*/