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Color and Size Legends

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KKarkG
Last edited Aug 5, 2020
Created on Aug 5, 2020

This example demonstrates two methods for building interactive legends in D3.js v5: a categorical color legend and a quantitative size legend. The color legend uses `scaleOrdinal` to map fruit names to distinct colors, while the size legend uses `scaleSqrt` to map a numeric range to circle radii. Both legends are rendered as SVG groups with circles and text labels, positioned via `translate` transforms. The reusable legend functions (`colorLegend` and `sizeLegend`) accept configuration objects specifying spacing, circle radius, and tick counts, allowing flexible customization within a single SVG canvas.

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