D3 Selections

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Last edited Jul 3, 2023

Created on Jun 21, 2023

This example animates a set of circles and vertical lines in an SVG, with the circles bobbing up and down in a sine wave pattern over time. The visualization uses D3’s `select`, `append`, and `selectAll` APIs to manage the SVG elements, and the `join` method to update the DOM as new data arrays are generated each frame by `makeData`. The animation is driven by a `setInterval` timer that updates the data and redraws the scene at 60 frames per second, with line opacity varying based on the circle’s vertical position.

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A bare minimum HTML page demonstrating use of CSS and JavaScript.

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