This example renders a choropleth map of India using React and D3. It displays state boundaries as SVG paths, filled with a teal color, against the full browser viewport. The map is projected using `d3.geoMercator` and drawn with `d3.geoPath`, while TopoJSON data is fetched from a remote gist and converted to GeoJSON via the `feature` function. React components manage the data loading lifecycle and render the SVG elements, with D3 handling the geographic calculations.