This example displays a choropleth-style map of Sweden’s counties, rendered as an SVG with aqua-filled regions outlined in red and internal borders in teal. It uses React to render the map and D3’s `geoMercator` projection with `geoPath` to draw the geographic features. The data is loaded as TopoJSON from a GitHub gist and processed with `feature` and `mesh` from the topojson library. The map shows the country’s subdivisions, with a simple loading state displayed while data fetches.