This example shows a summary of a laptop sales CSV file, displaying the file size, total number of rows, and columns fetched from a raw GitHub gist. The code uses D3 v7's `csvParse` method to parse the data, and then renders a simple static yellow triangle onto an SVG canvas appended to the HTML body. The user interface is built with React and D3's `select` API, using a minimal SVG polygon to provide a basic visual element alongside the textual data summary.