This example demonstrates two distinct legend designs for SVG visualizations: a color legend mapping ordinal fruit categories to distinct hues, and a size legend using a square-root scale to represent numeric values through circle radii. The color legend renders four labeled circles with custom spacing, while the size legend generates five ticks with varying circle sizes and text offsets. Both legends are built using D3 v5 data joins, scaleOrdinal, scaleSqrt, and explicit enter/merge/exit patterns, with styling applied through CSS classes on tick groups.