D3 Selection Exploration

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D3 Selection Exploration

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Last edited Feb 6, 2023

Created on Feb 5, 2023

An animated sine wave demonstrates D3 selections and the data-join pattern. The visualization generates circles and a connecting line path from computed trigonometric data, with the circle count varying over time. Using D3's `selectAll` and `join`, the example automatically handles enter, update, and exit states as data changes each frame. The code relies on `d3.select`, `d3.range`, and `d3.line` within an SVG rendering, updating at 60 frames per second via `setInterval`.

AI-generated description

Exploring Selection in D3

Notes :

select function lets you create d3 selections using a selector string where you can select elements that are already on the page.
selectAll :

svg.selectAll('circle')
It makes a d3 selection that contains all circles that exist within that svg.

In this example we see that d3.join has done the 'enter' ,'update' and 'exit' function internal work for us.

MIT Licensed

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