Collapsible Radial Reingold–Tilford Tree

CSS

.node {
  cursor: pointer;
}

.node circle {
  fill: #fff;
  stroke: steelblue;
  stroke-width: 1.5px;
}

.node text {
  font: 10px sans-serif;
}

.link {
  fill: none;
  stroke: #ccc;
  stroke-width: 1.5px;
}

JavaScript

var pubs =
{
    "name": "AUT-1",
    "children": [
        {
            "name": "PUB-1","children": [
                {"name": "AUT-11","children": [
                    {"name": "AFF-111"},
                    {"name": "AFF-112"}
                ]},
                {"name": "AUT-12","children": [
                    {"name": "AFF-121"}
                ]},
                {"name": "AUT-13","children": [
                    {"name": "AFF-131"},
                    {"name": "AFF-132"}
                ]},
                {"name": "AUT-14","children": [
                    {"name": "AFF-141"}
                ]}
            ]
        },
        {
            "name": "PUB-2","children": [
                {"name": "AUT-21"},
                {"name": "AUT-22"},
                {"name": "AUT-23"},
                {"name": "AUT-24"},
                {"name": "AUT-25"},
                {"name": "AUT-26"},
                {"name": "AUT-27"},
                {"name": "AUT-28","children":[
                    {"name": "AFF-281"},
                    {"name": "AFF-282"},
                    {"name": "AFF-283"},
                    {"name": "AFF-284"},
                    {"name": "AFF-285"},
                    {"name": "AFF-286"}
                ]}
            ]
        },
        {"name": "PUB-3"},
        {
            "name": "PUB-4","children": [
                {"name": "AUT-41"},
                {"name": "AUT-42"},
                {"name": "AUT-43","children": [
                    {"name": "AFF-431"},
                    {"name": "AFF-432"},
                    {"name": "AFF-433"},
                    {"name": "AFF-434","children":[
                        {"name": "ADD-4341"},
                        {"name": "ADD-4342"},
                    ]}
                ]},
                {"name": "AUT-44"}
            ]
        },
        {
            "name": "PUB-5","children": [
                {"name": "AUT-51","children":[
                    {"name": "AFF-511"},
      ...