Election History
This visualization displays over two centuries of U.S. presidential election results as a grid of colored cells, one per state and election year, with fill color indicating the winning party and opacity reflecting vote share. Built with D3 v4, it uses SVG rectangles mapped via `d3.scaleBand` for both axes, and adds a hover-based tooltip that highlights the corresponding row and column while showing vote totals and party percentages. A button toggles the vertical sorting between alphabetical and chronological state order using an animated transition.
AI-generated descriptionThis is a riff on this chart that I made for testing the tooltip from here: Avoidant Tooltip
forked from <a href='http://bl.ocks.org/alexmacy/'>alexmacy</a>'s block: <a href='http://bl.ocks.org/alexmacy/4d8168d038e0a75cfaf33cf290f51458'>Election History w/ Avoidant Tooltip</a>