This example demonstrates how to integrate D3.js v5 with React to create a simple map visualization. The HTML page loads React and D3 from CDNs, then renders a basic SVG map using D3’s geographic projection and path generation. The React component displays a static message, while the map itself is drawn using D3’s `d3.geoPath` and `d3.geoProjection` APIs, relying on built-in geographic data. The rendering happens client-side, with React managing the DOM container and D3 handling the map’s geometric shapes.