如何在掉线时摧毁自己（被我拉扯的div）

Question

$("#b").draggable();
$("#map_canvas").droppable({
drop: function() { 
    //alert('dropped');

    aFn();
    }

Answer 1

$("#map_canvas").droppable({
    drop: function(event, ui) { 
        $(this).remove(); // Destroy droppable
        ui.draggable.remove(); // Destroy draggable
    }
});