install.json

{
  "resources": {
    "head": [
      {
        "type": "style",
        "src": "./source/app.css"
      },
      {
        "type": "script",
        "src": "./source/app.js"
      }
    ]
  },
  "preview": {
    "handlers": [
      {
        "options": ["*"],
        "execute": "INSTALL_SCOPE.setOptions(INSTALL_OPTIONS)"
      }
    ]
  },
  "options": {
    "properties": {
      "blocks": {
        "title": "Rich Text Blocks",
        "order": 1,
        "type": "array",
        "default": [
          {
            "content": "<h1>Live rich text</h1><p>...Embedded directly on your site.</p>",
            "location": {
              "method": "prepend",
              "selector": "body"
            },
            "position": "left"
          }
        ],
        "items": {
          "title": "HTML Block",
          "type": "object",
          "properties": {
            "location": {
              "title": "Location",
              "description": "Where on the page would you like to add your content?",
              "type": "object",
              "format": "element",
              "order": 1,
              "default": {
                "method": "prepend",
                "selector": "body"
              }
            },
            "content": {
              "title": "Content",
              "type": "string",
              "format": "richtext",
              "order": 2
            },
            "position": {
              "order": 3,
              "title": "Horizontal alignment",
              "type": "string",
              "default": "left",
              "enum": [
                "left",
                "center",
                "right"
              ],
              "enumNames": {
                "left": "Left",
                "center": "Center",
                "right": "Right"
              }
            }
          }
        }
      }
    }
  }
}