This visualization gallery example presents a blank React and D3 starter template. It demonstrates a reusable `VizContainer` component that abstracts SVG and group elements, following the standard margin convention. The component accepts width, height, and margin properties, and can optionally display margin rectangles for debugging. The code uses `ReactDOM.render` to mount the app and defines a 960x500 SVG canvas with 30-pixel margins, rendering the container with a gray outer rectangle and lighter inner plotting area.