javascript - 测试事件处理程序是否绑定到jQuery中的元素[重复](test if event handler is bound to an element in jQuery [duplicate])

Question

This question already has an answer here:(这个问题在这里已有答案：)

jQuery find events handlers registered with an object 14 answers(jQuery查找用对象 14回答 注册的事件处理程序)

Is it possible to determine whether an element has a click handler, or a change handler, or any kind of event handler bound to it using jQuery?(是否可以确定元素是否具有单击处理程序，或更改处理程序，或使用jQuery绑定到它的任何类型的事件处理程序？)

Furthermore, is it possible to determine how many click handlers (or whatever kind of event handlers) it has for a given type of event, and what functions are in the event handlers?(此外，是否可以确定它对于给定类型的事件有多少点击处理程序（或任何类型的事件处理程序），以及事件处理程序中有哪些功能？)   ask by Elias Zamaria translate from so

Answer 1

You can get this information from the data cache.(您可以从数据缓存中获取此信息。)

For example, log them to the console (firebug, ie8):(例如，将它们记录到控制台（firebug，ie8）：) console.dir( $('#someElementId').data('events') ); or iterate them:(或者迭代它们：) jQuery.each($('#someElementId').data('events'), function(i, event){ jQuery.each(event, function(i, handler){ console.log( handler.toString() ); }); }); Another way is you can use the following bookmarklet but obviously this does not help at runtime.(另一种方法是你可以使用下面的书签，但显然这在运行时没有帮助。)