This example demonstrates how to set up a minimal D3.js visualization within the VizHub environment, displaying the text "Hello VizHub!" in a centered, large-font message. It loads D3 v5 from UNPKG and uses the `select` API to target a `div` element and set its text content. The code also illustrates ES6 module imports, both for local modules like `myMessage.js` and for D3’s API functions, alongside a regex literal and a constant, showcasing basic structure for interactive development.