{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "/widget/toc.json",
  "description": "Table of contents widget configurations",
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "toc"
    },
    "index": {
      "type": "boolean",
      "description": "Whether to show the index of each heading",
      "default": true,
      "nullable": true
    },
    "collapsed": {
      "type": "boolean",
      "description": "Whether to collapse sub-headings when they are out-of-view",
      "default": true,
      "nullable": true
    },
    "depth": {
      "type": "integer",
      "description": "Maximum level of headings to show (1-6)",
      "default": 3,
      "nullable": true
    }
  },
  "required": ["type"]
}