This example demonstrates a minimal setup for integrating CoffeeScript with D3 v7 using Rollup. It shows how a Rollup configuration with the `rollup-plugin-coffee-script` plugin compiles a CoffeeScript entry file (`main.coffee`) that logs “Hello from Coffeescript” to the console. The page itself is an empty HTML body, with D3 loaded as a global library via the VizHub dependency configuration. The visualization is a functional test of tooling rather than a data-driven graphic, relying on Rollup’s build pipeline to process the script.