How can you know if a system has a registered passkey without entering an email, and if no passkey , do not set up autoComplete with WebAuthn.like the blower image enter image description hereenter image description here enter image description here I know how to autofill the UI for passkeys, but my issue is that in scenarios without a passkey, the dropdown list still displays "use a different passkey," which can confuse users. Especially when the user has not registered a passkey, the drop-down panel displays "use a passkey", which is a bad experience,Therefore, what I want to achieve is to set authcomplete="username webauthn" only when the user has a passkey, and if the device does not have a passkey, set authcomplete="off." My question is how can I determine passkey existence without triggering the passkey interaction panel so that I can set authcomplete accordingly. I want to know if there is any way to determine whether the system has a corresponding passkey. If so, set webauthn. If not, do not set it (only display the account and password),just like picture show ，github implement this feature

How can you know if a system has a registered passkey without entering an email, and if no passkey , do not set up autoComplete with WebAuthn.like the blower image enter image description hereenter image description here enter image description here I know how to autofill the UI for passkeys, but my issue is that in scenarios without a passkey, the dropdown list still displays "use a different passkey," which can confuse users. Especially when the user has not registered a passkey, the drop-down panel displays "use a passkey", which is a bad experience,Therefore, what I want to achieve is to set authcomplete="username webauthn" only when the user has a passkey, and if the device does not have a passkey, set authcomplete="off." My question is how can I determine passkey existence without triggering the passkey interaction panel so that I can set authcomplete accordingly. I want to know if there is any way to determine whether the system has a corresponding passkey. If so, set webauthn. If not, do not set it (only display the account and password),just like picture show ，github implement this feature

• autocomplete
• autofill
• webauthn
• passkey

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The autofill UI is designed to be used for exactly this use case. You call WebAuthn in a conditionally mediated mode on page load, which will offer the autofill UI experience to the user.

https://passkeys.dev/docs/use-cases/bootstrapping/#authenticating-the-user

This is the recommended experience if your login screen has a username / identifier field.