Value

An integer. Note that this can be negative if the queue is over-full.

Examples

The A readable stream with an underlying push source and backpressure support example in the spec provides a good example of using desiredSize to manually detect when the stream is full and apply backpressure, and also of using ReadableStreamDefaultController.error() to manually trigger a stream error if another part of the system it relies on fails.

Specifications

Browser compatibility

See also

• Using readable streams
• ReadableStreamDefaultController