This example demonstrates how React manages interactive SVG rendering by drawing a single circle that follows the mouse cursor across the full browser window. The visualization tracks pointer movement through React state and event handling, updating the circle’s position in real time using the `useState` and `useCallback` hooks. The code renders an SVG element with ReactDOM, binding `onMouseMove` to update coordinate values, while the circle’s `cx` and `cy` attributes reflect the current mouse position. No external data source is used; it focuses purely on React’s declarative interaction model.