install.json

{
  "resources": {
    "body": [
      {
        "type": "style",
        "src": "./source/app.css"
      },
      {
        "type": "script",
        "src": "./source/app.js"
      }
    ]
  },
  "preview": {
    "handlers": [
      {
        "options": ["location", "numPosts"],
        "execute": "INSTALL_SCOPE.setOptions(INSTALL_OPTIONS)"
      },
      {
        "options": ["position"],
        "execute": "INSTALL_SCOPE.setPosition(INSTALL_OPTIONS)"
      }
    ]
  },
  "options": {
    "properties": {
      "location": {
        "title": "Location",
        "type": "object",
        "format": "element",
        "description": "Where should the Facebook Comments box appear?",
        "order": 1
      },
      "numPosts": {
        "order": 2,
        "title": "Number of Posts",
        "type": "number",
        "default": 5
      },
      "position": {
        "order": 3,
        "type": "string",
        "default": "center",
        "title": "Position",
        "enum": ["left", "center", "right"],
        "enumNames": {
          "left": "Left",
          "center": "Center",
          "right": "Right"
        }
      }
    }
  }
}