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The getAuthenticatorData() method of the AuthenticatorAttestationResponse interface returns an ArrayBuffer containing the authenticator data contained within the AuthenticatorAttestationResponse.attestationObject property.
This is a convenience function, created to allow easy access to the authenticator data without having to write extra parsing code to extract it from the attestationObject.
getAuthenticatorData()None.
An ArrayBuffer with a byteLength of at least 37 bytes, which contains the data structure explained in Authenticator data.
This will be equivalent to the authenticator data contained within the AuthenticatorAttestationResponse.attestationObject property.
See Creating a public key credential for a detailed example.