This example renders the MDN CSS named colors dataset as a pie chart, with each slice filled by its corresponding color hex value. Using React hooks, the code loads CSV data with `d3.csv` and stores it in state, while D3’s `pie` generator and `arc` function compute the slice geometry. The chart draws SVG `<path>` elements inside a `<g>` group, showing how React manages the component lifecycle and D3 handles the layout calculations.