PANE - Programming with visible data
▻http://joshuahhh.com/projects/pane
PANE is a prototype live, functional programming environment built around data-visibility. In PANE, all intermediate values are visible by default, and you construct a program by acting on these concrete values.
PANE has invited comparison to notebooks, especially live, reactive notebooks like Observable. But so far, the visibility that Observable offers programmers has not been fine-grained enough to create the sort of experience that PANE aims for. As a simple example: the moment you take a block of code in Observable and make it into a function, or put it in a loop, its internals become completely invisible. It remains to be seen if the Observable developers will try to push past these limitations.