How to Retrieve a List of Event Handlers Bound to an Element in jQuery?

Obtaining a List of Event Handlers Bound to an Element in jQuery

Consider an HTML element with the ID "elm" to which two event handlers are attached: one for the click event and another for the mouseover event. It may be desirable to obtain a list of all event handlers associated with this element.

To accomplish this in modern versions of jQuery, the $._data method can be leveraged. This method provides access to internal data associated with a jQuery object, including any events bound by jQuery. However, it's important to note that $._data is intended for internal use only.

The following code demonstrates how to use $._data to list events bound to the element with ID "elm":

// Bind event handlers to element
$('#elm').click(_f);
$('#elm').mouseover(_m);

// Retrieve events bound to element
$._data($('#elm')[0], "events");

The result of $._data will be an object containing all bound events. For each event, the object properties correspond to the event type, while the values correspond to an array of event handlers.

To further analyze event handlers, it's possible to right-click on the handler function in Chrome and select "view function definition." This action reveals the precise location where the handler is defined in the user's code.

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