Load CSV Data
This example loads a CSV file containing CSS named colors and summarizes its contents in text. The application uses React with the `useState` and `useEffect` hooks to manage the loading state, while D3’s `csv` utility fetches and parses the remote dataset from a GitHub gist. Once loaded, a custom message module reports the file size in kilobytes, row count, and column count, derived from `d3.csvFormat` and the data’s length and columns properties. The interface displays “loading” until the asynchronous request completes, then renders the computed statistics in a simple SVG-agnostic div element.