ReadonlykeyThe keySystem read-only property of the MediaKeySystemAccess interface returns a string identifying the key system being used.
The MediaKeySystemAccess.createMediaKeys() method returns a Promise that resolves to a new MediaKeys object.
The getConfiguration() method of the MediaKeySystemAccess interface returns an object with the supported combination of the following configuration options:
The
MediaKeySystemAccessinterface of the Encrypted Media Extensions API provides access to a Key System for decryption and/or a content protection provider. You can request an instance of this object using the Navigator.requestMediaKeySystemAccess() method. Available only in secure contexts.MDN Reference