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Coronavirus Deaths by Country over Time (with Voronoi Hover)
ZZarak
Last edited Apr 25, 2020
Created on Apr 25, 2020
This example displays cumulative COVID-19 deaths per country over time using a log-scaled line chart. A Voronoi overlay, constructed with `d3.Delaunay`, enables precise hover detection across all data points, highlighting the nearest country’s line and displaying a tooltip with the death count, country name, and date. The chart uses `d3.scaleTime`, `d3.scaleLog`, and `d3.line` with React for rendering, pulling timeseries data from the Johns Hopkins COVID-19 dataset.
AI-generated descriptionLine chart of Coronavirus cases to date, by country. Data from Johns Hopkins Coronavirus Dataset.
Hover to see details and illuminate lines.