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Comment by retox | Hacker News Reader

I'm sorry, I didn't mean to sound as dismissive as I my comment came across, I didn't have a lot of time to reply at the time. I can put together a video and better description of the problem if you like. All I did was grab the purple divs and drag them around randomly, things were working for a few drops then everything looked to get out sync.

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It seemed more robust today, not sure if you pushed an update. The problem seem to happen when dragging and dropping quickly, feels like the drop event isn't firing every time so the item gets stuck to the cursor then when it does fire next time you drag you 'pick up' more than one item.

The problem with the DFlex approach is it calculates coordinates and positions internally without calling browser API. While this approach considers very lightweight and allows to scale the number of interacted elements without causing any problem it has a trade-off. If one number is calculated wrong it affects all other node dependencies. One solution to this problem is considering a save mode to minimize error boundaries. Anyway, I'll investigate it and see where things go wrong. Thanks for your feedback, I appreciate it.

> I can put together a video and better description of the problem if you like.

Yes please, I can't fix the bug without being able to test it and reproduce it step by step so I can detect what went wrong.

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