Fork of D3.js collapsible tree with boxes
This fork of the D3.js library presents a collapsible tree diagram where each node is a box displaying labels, versions, and link directions. The hierarchy, loaded from a JSON file, is rendered as an SVG with animated expand and collapse transitions on click. The implementation uses `d3.layout.tree`, `d3.behavior.zoom` for pan and zoom, and custom arrow definitions to connect the boxes. Tooltips reveal additional node details, and colored rectangles distinguish the node types.