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Fork of Let's make a map with D3 with popup.js!
A world map rendered with D3.js displays country values from a CSV file, changing country color to red on hover while showing a tooltip with the country ID and value. Using d3.geoNaturalEarth1 projection and d3.geoPath, the visualization loads TopoJSON world data and CSV data via Promise.all. Mouseover events position an HTML tooltip near the cursor, while d.csv provides the id-value pairs that populate the tooltip text.
AI-generated descriptionDemonstrates fundamental DOM manipulation using D3.js by making a smiley face whose eyebrows move.