The Credential Management API enables a website to create, store, and retrieve navigator.credentials property and provides three main functions:

The API supports four different types of credential, which are all represented as subclasses of Credential:

Type	Interface
Password	`PasswordCredential`
Federated identity	`FederatedCredential` (deprecated)
One-time password (OTP)	`OTPCredential`
Web Authentication	`PublicKeyCredential`

The guide page Credential types gives an overview of the different credential types and how they are used.

Interfaces

Credential: Provides information about an entity as a prerequisite to a trust decision.
CredentialsContainer: Exposes methods to request credentials and notify the user agent when interesting events occur such as successful sign in or sign out. This interface is accessible from navigator.credentials.
FederatedCredential: Provides information about credentials from a federated identity provider, which is an entity that a website trusts to correctly authenticate a user, and which provides an API for that purpose. OpenID Connect is an example of such a framework.
PasswordCredential: Provides information about a username/password pair.

Navigator.credentials Read only: Returns the CredentialsContainer interface which exposes methods to request credentials and notify the user agent when interesting events occur such as successful sign in or sign out.

Specifications

Specification
Credential Management Level 1