The MediaKeySystemConfiguration interface EncryptedMediaExtensions API provides configuration information about the media key system.
The MediaKeySystemConfiguration.audioCapabilities read-only property returns an array of supported audio type and capability pairs.
The MediaKeySystemConfiguration.distinctiveIdentifier read-only property indicates whether a persistent distinctive identifier is required.
The MediaKeySystemConfiguration.persistentState read-only property indicates whether the ability to persist state is required.
The MediaKeySystemConfiguration.videoCapabilities read-only property returns an array of supported video type and capability pairs.
The MediaKeySystemConfiguration.initDataTypes read-only property returns a list of supported initialization data type names. An initialization data type is a string indicating the format of the initialization data.