Draggable: helper won't revert to original position if the original item was removed during the drag

[cburgdorf]

If you have a draggable set to "helper: clone" and "revert: invalid" it won't revert to the original position if the original element has disappeared in the meantime.

You can spot this behaviour using the red square in this fiddle. You can spot what normally happens when the original element stays there (blue square).

​http://jsfiddle.net/cburgdorf/YSEAs/

For me, it feels wrong. I think the helper should revert back to the original position and after that disappear just like the original element.

[cburgdorf]

I forgot to say. I would love to provide a fix for that myself as long we agree that the current behavour is wrong.

[Christoph Burgdorf]

Draggable: Incase helper is not set to 'original' succeed with revert action even if the original element has been removed. Fixes #6871

Changeset: 0ed452bf2581a83781c417dffe6ed4e3dbe2d676

[mikesherov]

This bug are now present again in 1.9: ​http://jsfiddle.net/EcwyG/

[mikesherov]

The regression here was caused by ​https://github.com/jquery/jquery-ui/commit/4da1716cfd88ac9b4a8362f715c081c2f75bd316

removing the original calls _destroy, which had a guard clause to not call _mouseDestroy if the original was removed.

In order to correct this behavior, we need to add the guard clause back in and then cause _mouseDestroy to be called after the revert action happens, or something similar. @scott.gonzalez, any thoughts on what correct behavipr here should be?

[mikesherov]

#6999 is a duplicate of this ticket.

[mikesherov]

even though we've previously patched this, I've discussed this with scott_gonzalez and it's not something we're going to support going forward. We're only going to support removing the original on "end" callbacks. In this case, that's "stop" for draggables. I'll open a docs issue shortly to document this.