A React component loads CSS named color data from a CSV URL using D3’s `d3.csv` and stores it in state via `useState` and `useEffect`. The app displays a text summary generated from the parsed data, showing file size in kilobytes, row count, and column count using `d3.csvFormat` and array properties. Before the data arrives, the view shows a loading message. The example relies on React 16.9, D3 v7, and a plain `<pre>` element for output.