install.json

{
  "resources": {
    "body": [
      {
        "type": "style",
        "src": "./build/app.css"
      },
      {
        "type": "script",
        "src": "./build/app.js"
      }
    ]
  },
  "preview": {
    "handlers": [
      {
        "options": ["_default"],
        "execute": "INSTALL_SCOPE.setOptions(INSTALL_OPTIONS)"
      }
    ]
  },
  "options": {
    "properties": {
      "location": {
        "title": "Button Location",
        "description": "Where should the button appear?",
        "order": 0,
        "type": "object",
        "format": "element",
        "default": {
          "selector": "body",
          "method": "prepend"
        }
      },
      "theme": {
        "order": 2,
        "title": "Theme",
        "format": "radios",
        "type": "string",
        "default": "dark",
        "enum": [
          "dark",
          "light",
          "blue",
          "lightBlue",
          "indigo",
        ],
        "enumNames": {
          "light": "Light",
          "dark": "Dark",
          "blue": "Blue",
          "green": "Green",
          "indigo": "Indigo",
          "lightBlue": "Light Blue"
        }
      }
    }
  }
}