This example demonstrates how to load and display dataset metadata using React and D3. The code fetches a CSV file of CSS named colors via D3’s `csv` utility, stores the parsed data in React state through the `useState` and `useEffect` hooks, and renders a summary using the `message` function. The summary reports the formatted file size in kilobytes, row count, and column count. D3’s `csvFormat` calculates the data size, while React manages the asynchronous loading state, showing “Loading...” until the data arrives.