d3 collapsible tree demo

Example of displaying data in a collapsible tree using D3.js

Demo

https://kyhau.github.io/d3-collapsible-tree-demo/collapsible_tree.html.

Run locally

1. Copy collapsible_tree.html and input_graph_tree.json to the same folder.

2. Run
   Python 3: python -m http.server 8080
   Python 2: python -m SimpleHTTPServer 8080

3. URL: localhost:8080/collapsible_tree.html