practice8--update pattern

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practice8--update pattern

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Last edited May 20, 2023

Created on May 20, 2023

This example demonstrates the D3.js “update” pattern for animating changes to a data-driven visualization, using a fruit bowl of apples and lemons. The code uses `selection.selectAll().data()` with the `.enter()`, `.merge()`, and `.exit()` methods to handle newly added, updated, and removed circles, respectively. Animations are applied through `.transition().duration(1000)` to smoothly adjust circle radii and positions over time. The example uses `scaleOrdinal` for color and radius mapping, with a fixed SVG viewport and a `render()` function called at intervals to trigger updates such as eating, replacing, or filtering fruits.

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Demonstrates fundamental DOM manipulation using D3.js by making a smiley face whose eyebrows move.

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