getting comfy using d3
This example introduces the VizHub Version 3 Runtime Environment, which supports continuous hot reloading through interactive widgets. The code exports a `main` function from `index.js` that receives a `container` DIV and an `options` object with `state` and `setState`, eliminating the need for an `index.html` file. It demonstrates how adjusting properties like font size by holding the Alt key and dragging a number provides immediate visual feedback. The example serves as a blank slate starting point, with an empty HTML file and no external libraries, focusing on the platform’s simplified setup and immutable state updates.