This example displays metadata about a COVID-19 dataset, showing the file size in kilobytes, row count, and column count as plain text on a black background. It fetches a CSV from a GitHub gist URL using `d3.csv`, then formats the loaded data with `d3.csvFormat` to calculate the byte length. The result is written to a `<pre>` element via `textContent`. The code uses D3 v5 and is embedded in a minimal HTML page with CSS styling.