PopState

{
  "type": "object",
  "properties": {
    "action": {
      "const": "popState",
      "default": "popState",
      "type": "string"
    },
    "key": {
      "description": "State key or dot-path to the array",
      "type": "string"
    },
    "index": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "string"
        }
      ],
      "description": "Index to remove (int or template string like `{{ $index }}`)."
    }
  },
  "required": [
    "action",
    "key",
    "index"
  ]
}