This example displays the number of rows and columns in a CSV dataset as large text, initially showing “loading…” before updating once data arrives. It uses React’s `useState` hook to hold the parsed data and `d3.csv` for loading from a remote GitHub gist URL. The app also fetches the same URL with `fetch` and parses the text via `d3.csvParse` for logging. The `message` helper computes the row and column counts displayed in a `<pre>` element.