Composite type which includes both a FirebaseError object and an index which can be used to get the errored item.

Signature:

export interface FirebaseArrayIndexError 

Properties

Property	Type	Description
error	FirebaseError	The error object.
index	number	The index of the errored item within the original array passed as part of the called API method.

FirebaseArrayIndexError.error

The error object.

Signature:

error: FirebaseError;

FirebaseArrayIndexError.index

The index of the errored item within the original array passed as part of the called API method.

Signature:

index: number;

Example

var registrationTokens = [token1, token2, token3];
admin.messaging().subscribeToTopic(registrationTokens, 'topic-name')
  .then(function(response) {
    if (response.failureCount > 0) {
      console.log("Following devices unsucessfully subscribed to topic:");
      response.errors.forEach(function(error) {
        var invalidToken = registrationTokens[error.index];
        console.log(invalidToken, error.error);
      });
    } else {
      console.log("All devices successfully subscribed to topic:", response);
    }
  })
  .catch(function(error) {
    console.log("Error subscribing to topic:", error);
  });