SVG Fundamentals
This example demonstrates the VizHub V3 Runtime Environment's continuous hot reloading with interactive widgets, allowing a numeric value to be modified by alt-dragging directly in the editor. The code renders a simple "Hello World" message inside a DIV element, with the font size controlled by a plain JavaScript variable. It uses the exported `main` function, which takes a `container` argument, and sets the layout via `container.innerHTML`. The example serves as a blank slate, highlighting the simplified setup without an `index.html` file and showcasing the basic pattern for interactive coding in the platform.