CSS Parser - JavaScript

A port of my C# CSS Parser project (https://bitbucket.org/DanRoberts/cssparser). Started because I'd like to try writing some plugins for Adobe Brackets that will analyse LESS and the plugins are written in JavaScript.

It takes (valid) LESS styles - eg.

div.w1, div.w2 {
  p {
    strong, em { font-weight: bold; }
  }
}

and returns an array of nodes representing the data -

[{
  "FragmentCategorisation": 3,
  "Selectors": [ "div.w1", "div.w2" ],
  "ParentSelectors": [],
  "ChildFragments": [{
      "FragmentCategorisation": 3,
      "Selectors": [ "p" ],
      "ParentSelectors": [ [ "div.w1", "div.w2" ] ],
      "ChildFragments": [{
          "FragmentCategorisation": 3,
          "Selectors": [ "strong", "em" ],
          "ParentSelectors": [ [ "div.w1", "div.w2" ], [ "p" ] ],
          "ChildFragments": [{
              "FragmentCategorisation": 4,
              "Value": "font-weight",
              "SourceLineIndex": 2
          }, {
              "FragmentCategorisation": 5,
              "Property": {
                  "FragmentCategorisation": 4,
                  "Value": "font-weight",
                  "SourceLineIndex": 2
              },
              "Values": [ "bold" ],
              "SourceLineIndex": 2
          }],
          "SourceLineIndex": 2
      }],
      "SourceLineIndex": 1
  }],
  "SourceLineIndex": 0
}];

The "FragmentCategorisation" values are described in an enum-esque reference CssParser.ExtendedLessParser.FragmentCategorisationOptions which has the properties

Comment: 0
Import: 1,
MediaQuery: 2,
Selector: 3,
StylePropertyName: 4,
StylePropertyValue: 5

The call syntax is

var result = CssParserJs.ExtendedLessParser.ParseIntoStructuredData(content);