Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The authenticatorAttachment read-only property of the PublicKeyCredential interface is a string that indicates the general category of authenticator used during the associated navigator.credentials.create() or navigator.credentials.get() call.
A string, which will be one of the following values:
"platform"
The authenticator is part of the device WebAuthn is running on (termed a platform authenticator), therefore WebAuthn will communicate with it using a transport available to that platform, such as a platform-specific API. A public key credential bound to a platform authenticator is called a platform credential.
"cross-platform"
The authenticator is not a part of the device WebAuthn is running on (termed a roaming authenticator as it can roam between different devices), therefore WebAuthn will communicate with it using a cross-platform transport protocol such as Bluetooth or NFC. A public key credential bound to a roaming authenticator is called a roaming credential.
js
const options = {
challenge: new Uint8Array(26) /* from the server */,
rp: {
name: "Example CORP",
id: "login.example.com",
},
user: {
id: new Uint8Array(26) /* To be changed for each user */,
name: "canand@example.com",
displayName: "Carina Anand",
},
pubKeyCredParams: [
{
type: "public-key",
alg: -7,
},
],
};
navigator.credentials
.create({ publicKey: options })
.then((pubKeyCredential) => {
const attachment = pubKeyCredential.authenticatorAttachment;
// Do something with authenticatorAttachment
})
.catch((err) => {
// Deal with any error
});
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
authenticatorAttachment |
98 | 98 | No | No | 84 | 15.5 | No | 98 | No | 68 | 15.5 | 18.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/PublicKeyCredential/authenticatorAttachment