Check if a event handler is attached to the document

Question

Lets say i attached an event handler to the document:

    $(document).on("keydown", function(e) {
        if(e.keyCode == 38){
           alert("Danger");
        }
    });

How can i check now in another function if this event handler is attached to the document. To be more clearer i would like to do something like this:

   if($(document).on("keydown"){
       $(document).off("keydown");
   }

Thanks!

There is no harm in trying to remove a listener that is not attached. — Paul S., May 10 '14 at 12:02
Yes i know my example is not realistic, but if there is no attached keydown i would like to generate a new! — John Smith, May 10 '14 at 12:04
You'll either have to use the **depreciated** `jQuery._data(element, 'events')` (don't modify this as you're accessing the inernals of jQuery), set your own flag when one is added or assume it's there, remove it and add a new one — Paul S., May 10 '14 at 12:07
If you goal is to just unbind event, then no need to check anything — A. Wolff, May 10 '14 at 12:17

score 0 · Accepted Answer · edited May 23 '17 at 12:05

0

you can use $._data, try this to get all events attached to document :

$._data($(document)[0], "events")

check this post for more

edited May 23 '17 at 12:05

Community

answered May 10 '14 at 12:30

Amir Sherafatian

1 Answers1