This example shows a yellow smiley face that follows the mouse cursor across an SVG canvas, with the face’s position updating in real time. Built with React and rendered through SVG, the code uses the useState hook to track mouse coordinates from the onMouseMove event and updates the circle’s center accordingly. The smiley face is constructed from simple SVG shapes, including a yellow circle for the head and two black circles for the eyes, all defined inline rather than using a data source.