I am using d3 library to draw system service maps.

This is my code https://jsfiddle.net/buinam3112/xsadpr1y/4/

This is my data:

{
  "name": "root",
  "children": [
    {
      "name": "group 1",
      "children": [
        {
          "name": "child 1",
          "children": [
            {
              "name": "name 1"
            },
            {
              "name": "name 2"
            }
          ]
        }
      ]
    },
    {
      "name": "group 2",
      "children": [
        {
          "name": "child 2",
          "children": [
            {
              "name": "name 3"
            },
            {
              "name": "name 4"
            }
          ]
        }
      ]
    }
  ]
}

My json data is constantly updated with type value, how can my chart automatically update node color based on type value?