tutorial
This example demonstrates the minimal "Hello World" setup for VizHub V3, showing how a single exported `main` function receives a container DIV and renders styled HTML content directly into it. The code uses plain JavaScript and DOM manipulation via `container.innerHTML`, with an interactive font-size value that can be changed by alt-dragging in the editor, though the live behavior itself is not shown in the snippet. No external libraries or data sources are used; the rendering approach is purely template-literal-based HTML injection.