Hello VizHub
This example demonstrates how to build a minimal visualization with VizHub, displaying the text “Hello VizHub!” centered on the page. It loads D3 v5 via UNPKG and uses `d3.select` to set the message content. The code also shows importing local ES6 modules, with a separate `myMessage.js` file exporting the message string, while `styles.css` handles the typography and centering.