This example displays a world map using an equirectangular projection, with countries rendered as yellow-filled SVG paths with black borders. Hovering over any country turns it white. It loads geographic data from the world-atlas TopoJSON file and converts it to GeoJSON using the `feature` method, then projects it with `d3.geoPath` and `geoEquirectangular`. The visualization is built with D3 v5 and rendered as SVG elements within a fixed-width page.