var text = "(A:0.1,B:0.2,(C:0.3,(D:0.4,E:0.6):0.1):0.5);";
var tree = patristic.parseNewick(text);
console.log(tree);

This generates a Branch object with the following contents:

{
  "id": "",
  "length": 0,
  "children": [
    {
      "id": "A",
      "length": 0.1
    },
    {
      "id": "B",
      "length": 0.2
    },
    {
      "id": "",
      "length": 0.5,
      "children": [
        {
          "id": "C",
          "length": 0.3
        },
        {
          "id": "",
          "length": 0.1,
          "children": [
            {
              "id": "D",
              "length": 0.4
            },
            {
              "id": "E",
              "length": 0.6
            }
          ]
        }
      ]
    }
  ]
}

Open your console to mess around with it!