react-chess

{
  "type": "object",
  "properties": {
    "image": {
      "type": "string",
      "description": "PNG, JPEG, WebP, GIF, or BMP as a data URL (data:image/png;base64,...) or raw base64. Prefer a data URL."
    },
    "mimeType": {
      "type": "string",
      "description": "Required when image is raw base64. Example: image/png or image/jpeg."
    },
    "url": {
      "type": "string",
      "description": "http(s) URL of an image, used as the page background instead of base64."
    },
    "clear": {
      "type": "boolean",
      "description": "If true, remove the custom background for the current theme only."
    }
  }
}