This example shows a React application that loads a CSV dataset of airline flights from a direct import and displays summary statistics about it. The app uses React hooks, specifically `useState` and `useEffect`, to manage the data as component state after the initial render. A message module uses `d3.csvFormat` to compute the data size in kilobytes, counts the number of rows, and counts the number of columns from the imported CSV. The resulting textual summary is rendered inside a `<pre>` element, with D3 v5 and React 16.9 loaded from CDNs.