This bar chart visualizes the first 20 countries from a COVID-19 dataset, displaying confirmed cases as horizontal bars on a green SVG canvas. It uses React with D3.js v5, employing `d3.scaleBand` for the categorical country axis and `d3.scaleLinear` for the numeric case counts. The chart renders axes using D3's `ticks()` method and maps each country to a `rect` element positioned via the scales. The visualization demonstrates how to combine React's declarative component structure with D3's quantitative scales to build an interactive-free chart.