This example demonstrates a minimal D3.js visualization that renders a text message centered on the page. It shows how to compose a D3-based web application using ES6 module imports, including importing the `select` function from D3 and a custom exported `message` constant from a local module. The code uses `select('#message').text(message)` to set the DOM element’s content, with styling applied via an external CSS file. The visualization is a static text display, serving as a template for integrating D3 with modern JavaScript module systems.