This example demonstrates loading a CSV dataset of CSS named colors using D3’s `csv` utility and managing the asynchronous state with React’s `useState` and `useEffect` hooks. Once loaded, the data is rendered as a pie chart in SVG, where each slice is colored with the hex value from its corresponding row, using d3’s `pie` and `arc` generators. The chart fills the browser window, centered on the screen, and displays a “Loading…” message until the data arrives.