Uzir Thapa
Uzir Thapa

Reputation: 29

Unhandled promise rejection SyntaxError Internet Explorer

I am using Vuejs, vuex, webpack, babel-polyfill, and axios.

This error is only appearing in Internet Explorer on our production server. It works on all other browsers and on local host. I am not sure why this is happening.

I have tried to look for this issue on the vuex and axios forums but there is no luck.

I appreciate the help.

Here is the Message from the console of IE11.

Thank you!

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
   }

Upvotes: 1

Views: 12746

Answers (1)

Max Liashuk
Max Liashuk

Reputation: 1053

This error appears when a promise you created was rejected and there was no explicit .catch for it. The only thing I can suggest you is to check all your code and verify that all promises have .catch 'es at some point.

Also, there is an event listener that can help you to figure out a reason why that promise was rejected, and where exactly it happened in the code:

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

Links:

Upvotes: 2

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