This example demonstrates a minimal D3.js setup within VizHub, displaying the text "Hello VizHub!" centered in a full-page message. It shows how to load D3 v5 from a CDN via UNPKG and use ES6 module imports, including a local module that exports the message string. The code explicitly uses the `select` API from D3 to set the text content of an HTML div element, while a separate CSS file styles the text. The visualization is static, with no data processing or interactive behavior beyond the initial render.