This example shows a horizontal bar chart of the top 10 countries by active COVID-19 cases, with a blue grid and labeled axes. The visualization is built using React and D3 v5, where D3’s `scaleBand` and `scaleLinear` determine bar positions and lengths, while React renders the SVG elements. Data is loaded asynchronously from a CSV file using D3’s `csv` method, and the chart updates once the data arrives.