This example demonstrates how a single-page web application can integrate D3.js with modern ES6 modules to render a large, styled text message on a solid dark background. The visualization displays the greeting “Hello World!” using D3’s `select` function to set the text content of a div element. The message is imported from a separate `myMessage.js` module, illustrating modular code organization. Styling is handled via CSS, with a custom Ubuntu font and a deep navy backdrop. The code uses D3 v5, loaded from a CDN, and runs entirely in the browser.