This example demonstrates how to load external data into a React application using D3 utilities. It fetches a CSV file containing sample sales data via the `d3.csv` method and displays summary statistics—approximate file size in kilobytes, row count, and column count—in a large text element. The React `useState` hook manages the data asynchronously, showing a “Loading...” message until the fetch resolves. The visualization relies on React 16.9, D3 v7, and the raw CSV hosted on GitHub.