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This example showcases the "Hello World" template for the VizHub V3 Runtime Environment, displaying a text string whose font size is set as a numeric value within the code. It demonstrates the platform's continuous hot reloading, where holding the Alt key and dragging the number `fontSize` in the editor updates the rendered output in real time. The visualization uses a simplified entry point, with a `main` function that receives a container DIV and writes the styled text directly into its innerHTML. No external libraries or data sources are used.