PublicKeyCredential: isUserVerifyingPlatformAuthenticatorAvailable() static method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.

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

The isUserVerifyingPlatformAuthenticatorAvailable() static method of the PublicKeyCredential interface returns a Promise which resolves to true if a user-verifying platform authenticator is present.

A user-verifying platform authenticator is a kind of multi-factor authenticator that is part of the client device (it is generally not removable) and that involves an action from the user in order to identify them. Common user-verifying platform authenticators include:

  • Touch ID or Face ID (macOS and iOS)
  • Windows Hello (Windows)
  • Device unlock (fingerprint, face, PIN, etc.) on Android

Note: This method may only be used in top-level contexts and will not be available in an <iframe> for example.

Syntax

js
PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable()

Parameters

None.

Return value

A Promise which resolves to a boolean value indicating whether or a not a user-verifying platform authenticator is available.

Note: In earlier versions of the specification, the boolean also conveyed the consent of the user to disclose such an authenticator existed.

Examples

js
PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable()
  .then((available) => {
    if (available) {
      // We can proceed with the creation of a PublicKeyCredential
      // with this authenticator
    } else {
      // Use another kind of authenticator or a classical login/password
      // workflow
    }
  })
  .catch((err) => {
    // Something went wrong
    console.error(err);
  });

Specifications

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

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
isUserVerifyingPlatformAuthenticatorAvailable() static method

Legend

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Full support
Full support
Partial support
Partial support
No support
No support
See implementation notes.
Has more compatibility info.

See also