This example demonstrates a zoomable scatterplot of colored circles, where users pan and zoom the entire visualization through mouse or touch interactions. The code uses D3’s `zoom` behavior and applies the resulting transform to a group element containing the circles. The circles are defined with hardcoded positions, radii, and fill colors, rendered with SVG elements. It showcases a reusable pattern for integrating d3-zoom with state management, as the transform is stored via a `setState` callback.