This example uses React and D3 v5 to render a horizontal bar chart of basic costs for 15 countries from a CSV dataset. It shows categorical marks as SVG rectangles positioned by a D3 `scaleBand` and `scaleLinear`, with axes drawn manually using gridlines and tick labels. The code imports D3 functions like `csv`, `scaleBand`, `scaleLinear`, and `max` within a React component, using hooks such as `useState` and `useEffect` to load data. All marks and channels are rendered declaratively as SVG elements.