D3 Selection Exploration

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D3 Selection Exploration

✓ Published2🌍 Public

Last edited Jan 7, 2026

Created on Jan 5, 2026

This example demonstrates D3’s data-join pattern by animating a dynamic set of circles whose count, position, and radius oscillate over time. Using `d3.select` to append an SVG, the code generates synthetic data with `d3.range` and updates circles each frame via `selection.join('circle')`, binding new data and setting `cx`, `cy`, and `r` attributes. The animation runs on a `setInterval` at 60 FPS, showing seamless entry, update, and exit transitions with D3 v6’s `join` method.

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