The PublicKeyCredentialCreationOptions dictionary represents the object passed to CredentialsContainer.create() as the value of the publicKey option: that is, when using create() to create a public key credential using the Web Authentication API.| developer.mozilla.org
The create() method of the CredentialsContainer interface creates a new credential, which can then be stored and later retrieved using the navigator.credentials.get() method. The retrieved credential can then be used by a website to authenticate a user.| developer.mozilla.org
The CSS.registerProperty() static method registers custom properties, allowing for property type checking, default values, and properties that do or do not inherit their value.| MDN Web Docs
The HTMLFormElement method requestSubmit() requests that the form be submitted using a specific submit button.| MDN Web Docs