This visualization summarizes the World Mortality Dataset, displaying its file size, row count, and column count as plain text. It loads the CSV data from a GitHub gist using the `d3.csv` method and computes the file size from the formatted CSV string. The code then reports the dataset’s dimensions, with the result presented in a large `<pre>` element. It relies on D3 v5’s `csv` and `csvFormat` functions to parse and measure the data, offering a concise overview of the dataset’s scale.