This example uses D3.js v3 within a minimal React-free HTML page to demonstrate the core charting workflow. The code sets up an interactive visualization by selecting an empty body element and appending SVG or canvas elements via D3’s data-join methods. While the provided files contain only the basic scaffolding—a blank `index.html` and an empty `app.js`—the intended purpose is to show how D3 selections and scales build a chart from scratch. The documentation references D3’s force simulation and path generators as potential next steps.