JS Is there a way to check if an event exists?

Question

I am trying to detect if a certain webkit event ' webkitAnimationEnd ' is supported by the browser, to do so I like to check if the event exists. But I can't seem to figure out how. Does anyone have a clue?

Answer 1

在没有浏览器嗅探的情况下检测事件支持表明这应该有效：

'onWebkitAnimationEnd' in document.createElement('div');

Answer 2

What do you mean by "is supported"? Assuming you mean "Will be fired by the browser under a particular set of circumstances" , then you need to simply recreate those circumstances (via script) and see if an event was fired; you can use a timeout handler to respond in the negative if the event was never handled.

Detect features by testing them, not by looking anywhere else.