Modal fires multiple hide events when closed multiple times via clicking backdrop.

[RGBboy]

When a user opens a modal and closes it by clicking the backdrop multiple times, the 'hide.bs.modal' event will fire an increasing number of time.

This is caused by the Modal.backdrop function attaching a click event listener every time the modal is shown.

[KoderES]

There's a way for not touch the core, but i don't know if it's cleaner or dirtier.

$('#MyModal').on('hide.bs.modal', function () {
$(this).off('hide.bs.modal');
});

[it4joy]

I'd rewrite the code listed by @KoderES above to (1st line):

$('#MyModal').off('hide.bs.modal').on('hide.bs.modal', function () { // ...