firebase. FirebaseError
FirebaseError is a subclass of the standard JavaScript Error object. In addition to a message string, it contains a string-valued code.
Properties
code
string
Error codes are strings using the following format:
"service/string-code"
While the message for a given error can change, the code will remain the same between backward-compatible versions of the Firebase SDK.
message
string
An explanatory message for the error that just occurred.
This message is designed to be helpful to you, the developer. It is not intended that you display it to the end user of your application (as it will generally not convey meaningful information to them).
name
string
The name of the class of Errors.
stack
string
A string value containing the execution backtrace when the error originally occurred.
This information can be useful to you and can be sent to Firebase Support to help explain the cause of an error.

