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

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?

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在没有浏览器嗅探的情况下检测事件支持表明这应该起作用：

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

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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.

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