问题
Is it possible to determine whether a given JavaScript action has been initiated by user? For instance I want to know whether a link was clicked by user or via jQuery fire event method?
回答1:
event.which will be undefined if the event is triggered with code.
jsFiddle.
来源：https://stackoverflow.com/questions/5948350/determine-whether-a-given-javascript-action-has-been-initiated-by-user