Hello VizHub
This example demonstrates a minimal D3.js setup that renders a custom text message to the screen. It imports the `select` function from D3 and a local ES6 module, `message.js`, to populate a `pre` element with the string “Hello VizHub.” The page loads D3 v5 from a CDN, uses a separate `styles.css` file to center the text at a large font size, and shows how to combine local modules with external libraries in a simple visualization.