Baseline Widely available
Note: This feature is available in Web Workers.
The desiredSize
read-only property of the ReadableStreamDefaultController
interface returns the desired size required to fill the stream's internal queue.
An integer. Note that this can be negative if the queue is over-full.
ExamplesThe 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.
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