SVG_Fundamentals
This example showcases fundamental SVG shapes and path elements, rendering a green circle and two stroked polylines directly within an HTML document. It demonstrates loading D3 v5 from a CDN and importing modules from local ES6 files, with the main `index.js` file using `select` to update a message element. The SVG markup is written inline, illustrating how static vector graphics can be combined with D3’s data-binding utilities and custom JavaScript modules. The CSS file styles the message text, while the visualization itself remains a simple, static composition.