The desiredSize
read-only property of the ReadableStreamDefaultController
interface returns the desired size required to fill the stream's internal queue.
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.
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.
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Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
desiredSize |
≤80 | 80 | 65 | No | 67 | ≤13.1 | 80 | 80 | 65 | 57 | ≤13.4 | 13.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamDefaultController/desiredSize