This interactive tree diagram displays a hierarchical dataset loaded from a local JSON file, showing the root node “Ganne” branching into descendants with clickable nodes. The visualization uses D3.js 3.5.17’s tree layout and SVG rendering with animated transitions. Node positions compute via `d3.layout.tree`, while clicking toggles children visibility using a collapse/expand function. The code employs `d3.svg.diagonal` for curved links, styled with green circular nodes and gray paths, and updates nodes with smooth 1100-millisecond transitions.