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D3 Canvas color transition

✓ Published0🌍 Public

Last edited Oct 30, 2017

Created on Oct 30, 2017

A canvas element displays a solid color circle that cycles through a smooth gradient from red to purple and back. The animation uses D3’s `d3.interpolateLab` to compute intermediate colors in the Lab color space, and a repeating `d3.interval` timer increments a value from 0 to 1, updating the canvas at each tick. The `setColor` function clears the canvas and redraws an arc filled with the interpolated color, using the canvas 2D context (`context.clearRect`, `context.fill`, and `context.arc`). The example demonstrates a lightweight, timer-driven color transition without external data, relying solely on the Canvas API and D3’s interpolation and interval utilities.

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D3 Canvas color transition

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