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Last edited May 5, 2020

Created on May 5, 2020

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This example demonstrates how D3 custom elements can drive a canvas-based drawing surface. As the mouse moves, the code appends `custom:circle` elements to a `custom:sketch` element, each with a red stroke that transitions to white over two seconds while expanding to a radius of 200. A `d3.timer` continuously clears the canvas and redraws all child elements, translating their attributes into Canvas 2D `arc` and `stroke` commands. The sketch uses a custom namespace prefix registered with `d3.ns.prefix` to create these elements.

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A bare minimum HTML page.

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