This example demonstrates two types of chart legends rendered side-by-side as SVG. A color legend uses `d3.scaleOrdinal` to map fruit names to distinct colors, while a size legend uses `d3.scaleSqrt` to encode numeric values through circle radii. Both legends animate with `transition().duration()`, and the size legend filters out zero values from its ticks. Styling comes from CSS classes applied to the tick groups, with text and circles positioned dynamically.