This example demonstrates how to load and parse CSV data using D3.js, displaying the file size, row count, and column count of the dataset. It uses `d3.csv` to fetch and parse the local `beijing.csv` file, which contains air quality measurements. The parsed data is then processed with `d3.csvFormat` to calculate the size, while `data.length` and `data.columns.length` provide the row and column counts. The result is displayed as large text in a `<pre>` element, highlighting the simplicity of D3’s data-loading API. An alternative approach using `fetch` and `d3.csvParse` is also included as commented code.