d3 and canvas

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d3 and canvas - the bind, the draw and the pick

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Last edited Sep 29, 2026

Created on Apr 11, 2022

This example demonstrates how d3 and Canvas can work together for interactive visualization, showing 5,000 colored grid cells arranged in a 10x10 group layout. The code uses d3.v4 to bind data to custom DOM elements, applying sequential color scales with d3.interpolateSpectral. Rendering happens through a main canvas while a hidden canvas uses unique generated RGB colors and a color-to-node map for picking interactions. A tooltip appears on hover, and d3.timer animates cell widths during transitions, with optional React integration via VizHub.

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

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