What is the content of the 'detail' property of a MouseEvent

Hi,

The MSDN documentation (https://msdn.microsoft.com/en-us/library/ff974344(v=vs.85).aspx) states that the 'detail' property of a MouseEvent gives additional information about an event.

Can anyone please advise on why the 'detail' property in a MouseEvent always 0?

Should it represent the number of consecutive clicks that have occured as other browsers do?

Thanks!