This example displays an interactive world map using Leaflet, with countries rendered as yellow polygons with black borders. The map initializes with a global view centered on [0,0] at zoom level 2. It fetches GeoJSON country boundaries from a GitHub-hosted world dataset and adds them to the map using Leaflet’s `L.geoJSON` method. The page also imports D3.js and local ES6 modules, though their primary role is demonstrated separately in the accompanying code structure.