This fork of a D3.js collapsible tree displays hierarchical data as colored, box-shaped nodes connected by labeled links. Each node is color-coded by its `type` field, and the tree supports collapsing and expanding branches through user interaction. The visualization is built with D3 v3 and jQuery, using SVG rendering and animated transitions to reorganize the layout. It includes zoom and drag functionality via `d3.behavior.zoom`, with tooltips that appear on hover to show additional node information. The example loads its data from a local JSON file.