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Re:JupyterLab: the next generation of the Jupyter Notebook by cdavid on Friday July 15, 2016 @09:11AM (#12100668)
tonicdev seems to do it, though I have never used it: http://blog.tonicdev.com/2015/09/10/time-traveling-in-node.j...

note: it does undo, but not recalculation on demand ala excel.

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