A React application demonstrates asynchronous data loading with D3, using React state to track whether a CSV dataset is loaded. The app fetches CSS named colors from a GitHub gist via `d3.csv` and stores the parsed result in React's `useState` hook. The interface displays a simple text indicator that changes from "loading" to "loaded" once the data arrives. The example uses React 16.9, D3 v6, and renders only a plain text message rather than any SVG visualization, with the SVG markup present in the HTML file commented out.