jQuery cloned element and it's child button click event fires multiple times

Question

I have some code to clone a table row:

// Clone existing row and make it a template row
var clone = $('table tbody tr:last').clone();
clone.insertBefore('table tbody tr:first');
clone.find('.edit').click();

As you see I want to fire the click event of a <button> with class .edit.

The click event is like this:

$('body').on('click', '.edit, .cancel', function(e)
{
    e.preventDefault();

    // Do something here...
});

The user clicks a dialog's close button and then I remove the table's container with $(".widget-container").remove();. Later on this container can be recreated if the user opens the dialog again - if this happens the container and the table are once again inserted into the DOM.

This is the code I use to load the dialog and it's HTML:

 $.ajax({
         url: 'getDialogUrl',
         type: 'GET',
         cache: false,
         success: function(html)
         {
             $(html).insertAfter('.someOtherExistingDOMElement');

             ....
         }

The problem is that in this second time, when clone.find('.edit').click(); is called it fires the click event twice. If I close the dialog and reopen it again, the click is fired 3 times and so on...

I thought that remove would clear all events bound to the elements that got removed from the DOM. Looks like this is not happening.

I guess I'm cloning it wrongly. I tried .clone(false) and .clone(false, false); but it kept the same behavior.

Why is this happening? Any ideas about what I'm doing wrong here?

Answer 1

This was another instance of "Found the solution after posting the question"... this question helped me solve it:

jQuery click events firing multiple times

What I had to do whas this:

$('body').off().on('click', '.edit, .cancel', function(e)
{
    e.preventDefault();

    // Do something here...
});

You see the off() there before the on(). This guarantees that only one click event is bound to the element.

This answer sheds some light on the issue.

You see: each time the on event handler is run it attaches another handler for the element and that's why every time I closed/removed the dialog and then reopened/recreated it it would attach as many event handlers as the number of times the dialog was opened. :)