Помогите, как узнать когда была нажата кнопа ESC для выхода, и изменить ширину и высоту блока. Вот код, не могу понять где Esc проверяют.

<script>
document.cancelFullScreen = document.cancelFullScreen || document.webkitCancelFullScreen ||      document.mozCancelFullScreen;

function onFullScreenEnter() {
  console.log("Enter fullscreen initiated from iframe");
};

function onFullScreenExit() {
  console.log("Exit fullscreen initiated from iframe");
};

// Note: FF nightly needs about:config full-screen-api.enabled set to true.
function enterFullscreen(id) {
    

  onFullScreenEnter(id);
  var el =  document.getElementById(id);
  var onfullscreenchange =  function(e){
    var fullscreenElement = document.fullscreenElement || document.mozFullscreenElement || document.webkitFullscreenElement;
    var fullscreenEnabled = document.fullscreenEnabled || document.mozFullscreenEnabled || document.webkitFullscreenEnabled;
    console.log( 'fullscreenEnabled = ' + fullscreenEnabled, ',  fullscreenElement = ', fullscreenElement, ',  e = ', e);
  }

  el.addEventListener("webkitfullscreenchange", onfullscreenchange);
  el.addEventListener("mozfullscreenchange",     onfullscreenchange);
  el.addEventListener("fullscreenchange",             onfullscreenchange);

  if (el.webkitRequestFullScreen) {
    el.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
  } else {
    el.mozRequestFullScreen();
  }
  document.querySelector('#'+id + ' button').onclick = function(){
    exitFullscreen(id);
    
    
  }
}

function exitFullscreen(id) {
  onFullScreenExit(id);
  document.cancelFullScreen();

  document.querySelector('#'+id + ' button').onclick = function(){
    enterFullscreen(id);
        
  }
}
</script>