This example displays a bar chart of salary hikes for the top 20 countries, with each bar’s length proportional to a population value from a CSV file. The visualization uses React to manage state and render the SVG, while D3 v5’s `csv` loader, `scaleBand`, `scaleLinear`, and `max` functions handle data parsing, scaling, and layout. Green rectangles represent the bars, with blue gridlines and tick labels generated manually from the scales. The data is fetched from a GitHub-hosted CSV via a raw URL.