This is too slow with the (very) detailed shapefiles. Maybe download them and upload a simplified version from mapshaper.org (this will also make the page load faster)

dropdown menu instead of slider? Since the numbers are discrete rather than continuous.

Might make it more performant to, as you won't be going through district 26, 27, 28... to get from 25 to 33

There are actually lots of proposed plans! This was the most recently proposed on October 6th, but we should reference the "most important" (e.g., actually being discussed/considered in Congress)

Todo: make this a single map with both overlapping to give context

Alternatively make each of these slightly smaller, and show the overlap of a zoomed in area to the right. Or, show one big map with both and two zoomed-in views (one for before and one for after).

mix-blend-mode is just for design choice -- this will be removed

Might be nice to add some labels for the big cities?

A good idea! Might be tricky with this oddly projected shapefile, but I'll look into it.

Bonus for clicking on a district rather than (or on top of) selecting its number in the range slider.

I like going for bonus points (though some districts are hard to click on?)