This example uses React and D3 v7 to render a color wheel from a CSV of named CSS colors. The code loads the dataset with `d3.csv`, computes the pie layout with `d3.pie`, and draws arcs with `d3.arc`, mapping each color’s hex value to its slice’s fill. The SVG is generated declaratively inside a React component, using `useState` and `useEffect` to manage asynchronous data fetching, with a loading state displayed before the visualization appears.