Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The createSession() method of the MediaKeys interface returns a new MediaKeySession object, which represents a context for message exchange with a content decryption module (CDM).
createSession()
createSession(mediaKeySessionType)mediaKeySessionType OptionalA string. Either "temporary" or "persistent-license". The default value is "temporary".
A new MediaKeySession object.