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This example demonstrates a minimal D3.js setup within VizHub, displaying the text “Hello VizHub!” centered on the page. It shows how to load D3 v5 from a CDN via UNPKG, use ES6 module imports to access the `select` function from D3, and import local custom modules from a separate file. The code selects a `div#message` element and sets its text content using D3’s selection API, with styling applied through an external CSS file.