This example demonstrates how to load and parse CSV data using D3 version 5, displaying summary statistics about the CSS Named Colors dataset from a GitHub gist. The visualization shows three key metrics: the file size in kilobytes, the number of rows, and the number of columns, rendered in large text. It utilizes D3’s `d3.csv` method with Promise-based asynchronous loading, alongside commented-out alternatives using the Fetch API with `async`/`await` and `d3.csvParse`. The code also includes a commented "pyramid of doom" example comparing older nested callback patterns with modern approaches.