This example shows a horizontal bar chart of the top 10 most populous countries in 2020, rendered as SVG inside a React component. The visualization uses React state and hooks to load CSV data from a GitHub gist, then applies D3’s `scaleBand` and `scaleLinear` to position bars and generate axis ticks. Manually drawn grid lines and tick labels for both axes are created by mapping over `xScale.ticks()` and the y-scale’s domain, with a fixed margin convention shaping the inner chart area.