This example displays a plain-text summary of a CSV dataset’s dimensions and size. It loads population data from a GitHub-hosted CSV file using `d3.csv` and then reports the column count, row count, and approximate file size in kilobytes via `d3.csvFormat`. The page is built with React 17 and D3 v7, with the message written directly to the document body via `document.body.textContent`. The embedded React scripts and a style block set the page’s font size.