The LocalMediaStream interface represents a stream of media content fetched from a local data source. This is the interface returned by getUserMedia().

The Network Information API provides information about the system's connection, which is in term of general connection type (e.g., 'wifi', 'cellular', etc.). This can be used to select high definition content or low definition content based on the user's connection. The entire API consists of the addition of the NetworkInformation interface and a single property to the Navigator interface: Navigator.connection.

The noscreen read-only property of the Notification interface specifies whether the notification firing should enable the device's screen or not, as specified in the noscreen option of the Notification() constructor.

The silent read-only property of the Notification interface specifies whether the notification should be silent, i.e. no sounds or vibrations should be issued, regardless of the device settings. This is specified in the renotify option of the Notification() constructor.

The sound read-only property of the Notification interface specifies the URL of an audio file to be played when the notification fires. This is specified in the sound option of the Notification() constructor.

The PromiseResolver interface represents an object controlling the state and the result value of a Promise.