I've seen a few posts about this, but no answers.

I would like to be able to call a function when a draggable revert
occurs. What I'm trying to do is replace a photo with an icon on drag
(which I've accomplished), but I need to swap it back if the revert

I really, really wish there were an onRevert() option, but there
isn't, so I guess I'll have to hack my own.

I think this is where I'd hook it in (line 231 in 1.8.0):

     reverteffect: function(element, top_offset, left_offset) {
        var dur =
        new Effect.Move(element, { x: -left_offset, y: -top_offset,
duration: dur,
          queue: {scope:'_draggable', position:'end'}

I propose putting it as a beforeStart call in the Effect.Move

Does this make sense?
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