This example demonstrates the minimal setup for a D3.js visualization, rendering the text “Hello World” in a large, styled format. It uses the D3 selection API (`d3.select`) to target a `div` element and set its text content. The code imports a local ES6 module (`myMessage.js`) for the message string, and uses CSS for styling with the Ubuntu font and a dark blue background. The page loads D3 v5 from a CDN and organizes JavaScript into separate modules.