How to remove an element slowly with jQuery?

$target.hide('slow');

or

$target.hide('slow', function(){ $target.remove(); });

to run the animation, then remove it from DOM

target.fadeOut(300, function(){ $(this).remove();});

or

$('#target_id').fadeOut(300, function(){ $(this).remove();});

Duplicate: How to "fadeOut" & "remove" a div in jQuery?