{"version":"1.0","type":"rich","title":"d3 mapping","description":"A rectangle centered in an SVG canvas animates its fill color from dark red to light blue over three seconds, demonstrating a simple transition with a bounce easing. The example uses D3.js version 3.5.5, applying a `transition().duration(3000).ease(\"bounce\")` to a `rect` element with explicit `x`, `y`, `width`, and `height` attributes. The SVG is sized to 960 by 500 pixels with margins, and the code runs directly in the browser, logging a confirmation message to the console. No external data source is involved; the visualization relies solely on hardcoded geometry and styling.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-25fa3e51da9a1ac22e02?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}