web api instance property
ReadableStreamDefaultController: desiredSize property
Available in workers
The desiredSize read-only property of the
ReadableStreamDefaultController interface returns the desired size
required to fill the stream’s internal queue.
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
error() to manually trigger a stream
error if another part of the system it relies on fails.
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.