For details of how to use this library, please check the API documents.
Try to press keyboard keys in the 3rd input box (which is managed by QiaKeyboardShortcutHelper) to check the functionalities.
This page area is registered and then deregistered as a shortcut reaction area.
This page area is registered as a shortcut area.
Try to press the following listed shortcuts in the above two input boxes or outside the input boxes to check the functionalities.