This example demonstrates how to load external CSV data and manage it with React state. The app fetches a dataset of CSS named colors from a GitHub gist using D3’s `d3.csv` utility inside a `useEffect` hook, then displays summary statistics—file size in kilobytes, row count, and column count—in a large `<pre>` element. React’s `useState` holds the parsed data while the component renders a “Loading…” message until the data arrives. The visualization combines D3 v7’s data-loading capabilities with React 16.9’s hooks for asynchronous state management, rendering text output via SVG-free HTML.