{"version":"1.0","type":"rich","title":"Fork of Fade Out Fade In 4 - test","description":"Four red circles fade in one by one as two blue circles fade out and are removed from an SVG canvas. The code uses d3 v7 transitions with a `transition.remove()` call and an `on(\"end\")` handler to trigger the second dataset’s entry selection. A conditional checks the index to ensure the callback runs only after the last blue circle’s transition completes. The example demonstrates sequencing data joins and element removal with `selectAll`, `data`, and `enter` methods.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/b4314619a4f54c2c86cb941f30388311?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}