QuerySnapshot contains zero or more
representing the results of a query. The documents can be accessed as an
array via the
docs property or enumerated using the
forEach method. The
number of documents can be determined via the
An array of all the documents in the
True if there are no documents in the
Metadata about this snapshot, concerning its source and if it has local modifications.
The query on which you called
onSnapshot in order to get this
The number of documents in the
Returns an array of the documents changes since the last snapshot. If this is the first snapshot, all documents will be in the list as added changes.
Optional options: SnapshotListenOptions
SnapshotListenOptionsthat control whether metadata-only changes (i.e. only
DocumentSnapshot.metadatachanged) should trigger snapshot events.
Enumerates all of the documents in the
A callback to be called with a
QueryDocumentSnapshotfor each document in the snapshot.