Observable Framework[0] attempted to fill this niche for a while as well, and we'll likely see some of the implementation details in the new Observable Notebook

Observable Framework[0] attempted to fill this niche for a while as well, and we'll likely see some of the implementation details in the new Observable Notebook 2.0 format too. [0]: https://github.com/observablehq/framework https://github.com/observablehq/framework