jQuery slideDown callback if complete or fail.. 'always' option

Question

Silly question but i can't seem to figure it out.

In the jquery documents it shows an option in the slideUp() function which is "always". which will call a function once the animation completes or fails How do i implement this?

http://api.jquery.com/slideUp/

$(".toHide").slideUp(function(){
   alert();
})

basically want that alert to be called no matter what after the animation.. currently only calls if it completes not fail.

animation fails if the class doesnt yet exist

Answer 1

All animations can generate promise objects which have an always method.

$(".toHide").slideUp().promise().always(function(){
    alert("foobar");
});

however, animations can't "fail", so it's irrelevant anyway.

Answer 2

Options are typically in the format of {option: optionVal, option2: option2Val}

$('.toHide').slideUp({ 
  always: function(Promise animation, Boolean jumpedToEnd){}
});