d3 enter/update/exit patterns

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d3 enter/update/exit patterns

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Last edited Jul 15, 2020

Created on Jul 15, 2020

This example demonstrates the classic D3 enter/update/exit pattern for animating changes to a dataset. Over a timed sequence, fruits are removed, a lemon replaces an apple, and another item is filtered out, all while the visualization smoothly transitions the circles' positions and radii. The code uses D3's selection `merge` and `.transition().duration()` methods to animate attribute changes, with `circles.exit()` shrinking departing elements to a radius of zero before removing them. The scene is rendered as SVG with a static bowl rect, and data is generated randomly with a color scale mapping fruit types.

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d3 update pattern

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