This example shows an interactive family tree visualization built with D3.js (v3) and SVG. It renders hierarchical data from a JSON file as colored, rounded rectangles connected by links, with each node color-coded by generation type. The tree layout uses d3.layout.tree, and users can click nodes to expand or collapse branches. The visualization includes zoom and drag behavior via d3.behavior.zoom, along with tooltips and drop-shadow filters for visual polish.