This example demonstrates the top 10 most populous countries in 2020 from the United Nations World Population Prospects 2019 dataset, displayed as a bar chart without axes using React and D3. The code loads CSV data with d3.csv, converts population strings to numbers, and slices the dataset to the first ten entries. It uses React hooks (useState, useEffect) to handle asynchronous data loading, then renders an SVG with scaleBand, scaleLinear, and explicit x- and y-axis tick marks created from d3.scaleLinear’s `.ticks()` method. The chart updates once data arrives, showing a loading message initially.