{"version":"1.0","type":"rich","title":"Mouse Follower","description":"A black circle of radius 30 follows the mouse cursor across a 960-by-500 SVG canvas. React's `useState` and `useCallback` hooks track the cursor’s client coordinates, updating the circle’s `cx` and `cy` attributes on every `mousemove` event. D3 v5 is loaded but not used in the visible logic; rendering is purely React-driven SVG.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/5eca3080ab284517b8f7474f97b50c16?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}