AuthenticatorAssertionResponse: authenticatorData property

{{securecontext_header}}{{APIRef("Web Authentication API")}}

The authenticatorData property of the {{domxref("AuthenticatorAssertionResponse")}} interface returns an {{jsxref("ArrayBuffer")}} containing information from the authenticator such as the Relying Party ID Hash (rpIdHash), a signature counter, test of user presence, user verification flags, and any extensions processed by the authenticator.

Value

An {{jsxref("ArrayBuffer")}} with a {{jsxref("ArrayBuffer.byteLength", "byteLength")}} of at least 37 bytes, which contains the data structure explained in Authenticator data.

Examples

See Retrieving a public key credential for a detailed example.

Specifications

{{Specifications}}

Browser compatibility

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