Необработанное отклонение обещания SyntaxError Internet Explorer

Question

Я использую Vuejs, vuex, webpack, babel-polyfill и axios.

Эта ошибка появляется только в Internet Explorer на нашем рабочем сервере.Он работает во всех других браузерах и на локальном хосте.Я не уверен, почему это происходит.

Я пытался найти эту проблему на форумах vuex и axios, но безуспешно.

Я благодарен за помощь.

Вот сообщение из консолиIE11.

Спасибо!

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Unhandled promise rejection SyntaxError
   "Unhandled promise rejection"
   {
      [functions]: ,
      __proto__: { },
      ABORT_ERR: 20,
      code: 12,
      constructor: { },
      DATA_CLONE_ERR: 25,
      DOMSTRING_SIZE_ERR: 2,
      HIERARCHY_REQUEST_ERR: 3,
      INDEX_SIZE_ERR: 1,
      INUSE_ATTRIBUTE_ERR: 10,
      INVALID_ACCESS_ERR: 15,
      INVALID_CHARACTER_ERR: 5,
      INVALID_MODIFICATION_ERR: 13,
      INVALID_NODE_TYPE_ERR: 24,
      INVALID_STATE_ERR: 11,
      message: "SyntaxError",
      name: "SyntaxError",
      NAMESPACE_ERR: 14,
      NETWORK_ERR: 19,
      NO_DATA_ALLOWED_ERR: 6,
      NO_MODIFICATION_ALLOWED_ERR: 7,
      NOT_FOUND_ERR: 8,
      NOT_SUPPORTED_ERR: 9,
      PARSE_ERR: 81,
      QUOTA_EXCEEDED_ERR: 22,
      SECURITY_ERR: 18,
      SERIALIZE_ERR: 82,
      SYNTAX_ERR: 12,
      TIMEOUT_ERR: 23,
      TYPE_MISMATCH_ERR: 17,
      URL_MISMATCH_ERR: 21,
      VALIDATION_ERR: 16,
      WRONG_DOCUMENT_ERR: 4
   }

Answer 1

Эта ошибка появляется, когда созданное вами обещание было отклонено, и для него не было явного .catch.Единственное, что я могу вам предложить, это проверить весь ваш код и убедиться, что все обещания в какой-то момент имеют .catch.

Кроме того, есть прослушиватель событий, который может помочь вам выяснить причинупочему это обещание было отклонено и где именно это произошло в коде:

window.addEventListener("unhandledrejection", function (event) {
  console.warn("WARNING: Unhandled promise rejection. Reason: " + event.reason, event);
});

Ссылки:

• http://2ality.com/2016/04/unhandled-rejections.html
• https://googlechrome.github.io/samples/promise-rejection-events/
• https://developer.mozilla.org/en-US/docs/Web/Events/unhandledrejection