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D3.JS 中的可折叠图:多个根点

我正在寻找使用 d3js 创建一个可折叠图作为这个http://bl.ocks.org/d3noob/8375092但我想添加许多根点(以下示例中的 Top Level_1 和 Top Level_2)

var treeData = [
  {
    "name": "Top Level_1",
    "parent": "null",
    "children": [
      {
        "name": "Level 2: A",
        "parent": "Top Level",
        "children": [
          {
            "name": "Son of A",
            "parent": "Level 2: A"
          },
          {
            "name": "Daughter of A",
            "parent": "Level 2: A"
          }
        ]
      },
      {
        "name": "Level 2: B",
        "parent": "Top Level"
      }
    ],
"name": "Top Level_2",
        "parent": "null",
        "children": [
          {
            "name": "Level 2_2: A",
            "parent": "Top Level",
            "children": …
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javascript graph d3.js

3
推荐指数
1
解决办法
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