Spaghetti Western

The New York Times has built handsome spaghetti line charts showing which counties swung more Democrat or Republican over the last four US elections, in a very slick scrollytelling format. It’s immediately clear that rural, educated voters moved the dial for Biden, but I’m just as interested in the technical implementation of this graph — a canvas with an SVG overlay. No-one said you can’t nerd out over election results and HTML at the same time…