data visualization
This example demonstrates the VizHub V3 runtime environment, where a static "Hello World" message is rendered with an adjustable font size using plain HTML and inline styles. The code exports a `main` function that receives a container element and sets its inner HTML, showcasing the simplified entry point without an `index.html` file. By Alt-dragging the `fontSize` variable in the editor, users experience continuous hot reloading through interactive widgets, highlighting real-time feedback for iterative development.