This is an experimental technology Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The id property of the Credential interface returns a DOMString containing the credential's identifier. This might be any one of a GUID, username, or email address.
var id = Credential.id;
A a DOMString containing the credential's identifier.
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