SVG Fundamentals
This example demonstrates the VizHub V3 runtime environment, where a single `main` function receives a container element and renders a static “Hello World!” message using inline SVG-style HTML. The code uses no external libraries, only plain JavaScript DOM manipulation via `container.innerHTML`. A numeric variable sets the font size, which can be interactively adjusted by holding Alt and dragging the value in the editor, supporting continuous hot reloading. This provides a minimal, blank-slate template for building interactive visualizations within the platform.