This example demonstrates two distinct legend patterns for encoding data. A color legend uses a d3.scaleOrdinal to map categorical fruit names to colored circles, while a size legend employs d3.scaleSqrt to represent numeric values through circle radius, with tick marks generated via sizeScale.ticks. Both legends are built with D3 v5 data joins, appending SVG groups, circles, and text elements with configurable spacing and offsets, rendering in a standalone SVG canvas.