I especially liked the example of the interactive cross-filter: https://altair-viz.github.io/gallery/interactive_layered_crossfilter.html https://altair-viz.git

I especially liked the example of the interactive cross-filter: https://altair-viz.github.io/gallery/interactive_layered_crossfilter.html https://altair-viz.github.io/gallery/interactive_layered_cro... However I didn't get around to learning the principles to use it regularly. And I fear if you have a certain chart in your head with some special stuff you end up tinkering around eventually get a lot of code.