This example shows an interactive gap chart built with React, where a small multiple grid displays the development of the selected indicator across different countries. The visualization combines data points with a line chart, using a React component to render the chart and a geographic map to highlight the current country. The code relies on the `d3` library for data binding and SVG rendering, with the map using `d3.geoPath` and the line chart updating through a `transition` on the chart’s parameters. The source data appears to be a JSON file containing country-specific statistics.