A gauge in D3.js with gradient generator

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A gauge in D3.js with gradient generator

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Last edited Aug 10, 2020

Created on Aug 10, 2020

This gauge visualization displays six semicircular arcs around a central value readout, each shaded with a gradient that transitions between colors to represent different battery and power states. The code uses D3.js v5’s `arc` generator and `transition` method, building linear gradients via `svg.append('defs')` with `linearGradient` elements positioned using trigonometric calculations. A dark slate indicator arc and a white percentage text label update smoothly, while the SVG canvas is statically sized at 900×500 pixels.

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Test gauge with gradient generator

MIT Licensed

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