This example demonstrates how React and d3 can work together to load and display a CSV dataset, showing the file size, row count, and column count as plain text. The React component uses the `useState` and `useEffect` hooks to manage loading state and fetch data once on mount via `d3.csv`, while `d3.csvFormat` calculates the data size. The message updates from "Loading..." to the summary once the data from the GitHub-hosted CSV file arrives. It uses React 16 and d3 v7, with ReactDOM rendering the result into the page.