showContextMenu(false); only when you click outside the Right Click Menu

I have got some code just for a basic right-click with no current functionality accept to open and close but currently, if you click anywhere including inside the right-click context menu is closes but I'm wondering how could I make it showContextMenu(false); only if I click outside of the right-click context menu as I do not know and I have done some research but I have not found any help so I decided to turn to stack overflow for help. If you can help me or try to help me then thanks.