This example demonstrates how VizHub supports modular ES6 development with D3.js, displaying a simple "Hello World!" message centered on the page. The code imports the `select` function from D3 and a custom `message` constant from a local ES6 module, then uses `select('#message').text()` to update the DOM. Styling comes from an external stylesheet, while D3 v5 is loaded via CDN. The visualization shows basic DOM manipulation and module imports rather than data-driven graphics.