desiredSize property

double? get desiredSize

The desiredSize read-only property of the ReadableByteStreamController interface returns the number of bytes required to fill the stream's internal queue to its "desired size".

The value is used by the stream to indicate a preferred flow rate to the underlying source. Sources that support throttling or pausing their inflow of data (not all do!) should control the inflow such that desiredSize of the stream buffer is kept positive and as close to zero as possible.

The desiredSize is used to apply backpressure from downstream consumers.

Implementation

external double? get desiredSize;