This example demonstrates a React and D3 integration where CSS named color data is loaded asynchronously from a CSV file using `d3.csv`. The application uses React state with `useState` and `useEffect` hooks to manage the loading process, showing a "Data is loading..." message until the dataset arrives. Once loaded, `d3.pie` computes arc segments from the Percentage column of the data, though the visualization currently only logs the computed arcs to the console and displays a "Data loaded" message. The example highlights how D3 utilities can handle data processing while React manages the component lifecycle and rendering.