This example demonstrates how to set up a minimal VizHub visualization using D3 v5 and ES6 modules. It loads D3 from UNPKG and imports the `select` function to target a DOM element, while a local module exports a custom message string. The code renders the text " VizHub!" inside a styled div, with CSS centered and enlarged via the `#message` selector. It illustrates basic module imports, CDN library loading, and D3’s selection API for updating page content.