AuthenticatorAttestationResponse: getAuthenticatorData() method

Baseline 2023

Newly available

Since October 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

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.

Syntax

js
getAuthenticatorData()

Parameters

None.

Return value

An ArrayBuffer with a ArrayBuffer.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.

Examples

See Creating a public key credential using the WebAuthn API for a detailed example.

Specifications

Specification
Web Authentication: An API for accessing Public Key Credentials - Level 3
# dom-authenticatorattestationresponse-getauthenticatordata

Browser compatibility

BCD tables only load in the browser