{"version":"1.0","type":"rich","title":"Animation Practice","description":"A blue div demonstrates chained D3 transitions, changing background color to green, fading to transparent yellow, then returning to full opacity over three 3-second stages. Using D3 v7’s `transition`, `duration`, and `style` methods within `index.js`, the animation runs on page load via `main()`. The example shows basic sequencing without data, relying on SVG-free DOM manipulation and the `d3.select` API.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/1e34c2b7fe9840e5bd5a8fb3e8c9e501?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}