Thanks, I have looked through them . The drop test part is working fine , my issue is animating the swap between two elements
When i drag an element onto another element, the dragged element should move into the place where the element is dropped (I have this working)
Then the dropped element should move (animated) back to the dragged elements original position. I just need some help with the logic of this, i've tried various methods
Edit, I have solved it by swapping the elements inside a wrapper using java script, then tweening the dragged wrapper (with the new element inside) back to its starting location
Doesn't seem like the best solution, but its a solution !