This example shows the ten most populous countries from a 2019 UN population dataset, rendered as horizontal bars in an SVG chart. React 16 manages the component state and loading screen, while D3 v6 utilities (`csv`, `scaleBand`, `scaleLinear`, `max`) handle data fetching and scaling. The code converts each country’s 2020 population value to a numeric field and maps it to a bar width using a linear scale, with bands for each country name.