This example shows a React application that loads a CSV file of CSS named colors and displays a summary of the dataset. The interface presents a large-text message reporting the file size in kilobytes, the number of data rows, and the number of columns. The app uses React’s `useState` and `useEffect` hooks to manage the asynchronous data loading, with D3’s `csv` function fetching the remote CSV file. Once the data is retrieved, the custom `message` module calculates the byte length of the formatted data using `d3.csvFormat`.