KeyboardEvent Object
ctrlKeyboolean (optional) - whether the Control key was used in an accelerator to trigger the EventmetaKeyboolean (optional) - whether a meta key was used in an accelerator to trigger the EventshiftKeyboolean (optional) - whether a Shift key was used in an accelerator to trigger the EventaltKeyboolean (optional) - whether an Alt key was used in an accelerator to trigger the EventtriggeredByAcceleratorboolean (optional) - whether an accelerator was used to trigger the event as opposed to another user gesture like mouse click