This interactive tree diagram visualizes hierarchical data from a JSON file, using rectangular links to connect parent and child nodes. The visualization is built with D3 version 6, employing the `d3.cluster` algorithm for layout and custom SVG path generation for the orthogonal edges. Users can click on individual nodes to expand or collapse their subtrees, triggering smooth animated transitions that reposition the remaining elements. The diagram displays node labels alongside colored rectangles indicating whether each node has children, with the viewport automatically adjusting to fit the current layout through transitions.