This example summarizes a CSV dataset of World Bank GDP figures for 264 countries from 1970 to 2017. It displays the row count, column count, and file size in kilobytes, followed by a JSON-formatted preview of the first 10 rows. The visualization uses D3 v5’s `csv` and `csvFormat` functions to load and measure the data, and appends the summary to the page as `pre` elements with a monospace terminal aesthetic.