This example demonstrates a minimal D3.js visualization that displays the text "Hello VizHub!" in the center of the page, sized at 12em. The code loads D3 via UNPKG and uses the D3 `select` API to target the HTML element with the ID `message`, setting its text content. It also showcases the use of ES6 modules by importing a message string from a local file. The visualization relies on static HTML and CSS for styling, with no data processing or dynamic rendering.