install.json

{
  "resources": {
    "body": [
      {
        "type": "style",
        "src": "./build/app.css"
      },
      {
        "type": "script",
        "src": "./build/app.js"
      }
    ]
  },
  "preview": {
    "handlers": [
      {
        "options": ["*"],
        "execute": "INSTALL_SCOPE.setOptions(INSTALL_OPTIONS)"
      }
    ]
  },
  "options": {
    "properties": {
      "ie": {
        "order": 0,
        "minimum": 0,
        "default": 9,
        "title": "Internet Explorer",
        "description": "Minimum supported version of Internet Explorer.",
        "placeholder": "0",
        "type": "number"
      },
      "edge": {
        "order": 1,
        "minimum": 0,
        "default": 14.14393,
        "title": "Microsoft Edge",
        "description": "Minimum supported version of Microsoft Edge.",
        "placeholder": "0",
        "type": "number"
      },
      "firefox": {
        "order": 2,
        "minimum": 0,
        "default": 60,
        "title": "Mozilla Firefox",
        "description": "Minimum supported version of Mozilla Firefox.",
        "placeholder": "0",
        "type": "number"
      },
      "chrome": {
        "order": 3,
        "minimum": 0,
        "default": 60,
        "title": "Google Chrome",
        "description": "Minimum supported version of Google Chrome.",
        "placeholder": "0",
        "type": "number"
      },
      "safari": {
        "order": 4,
        "minimum": 0,
        "default": 10,
        "title": "Safari",
        "description": "Minimum supported version of Safari.",
        "placeholder": "0",
        "type": "number"
      }
    }
  }
}