This example demonstrates how to load D3 via UNPKG and use ES6 modules in a VizHub project. It imports the `select` function from D3 and a local `message` export from `myMessage.js`, then sets the text content of a `div#message` element to display "Hello VizHub!". The code also defines an unused constant and regular expression. The page uses a linked `styles.css` file to center the message and set its font size to 12em.